Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Experiments & Modifications



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 07-03-2011, 06:45 PM #17
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

Quote:
Originally Posted by random person View Post
Sorry, got a question for you since i'm very new to PCB design.

When looking at

Apart from the VIAs and the 2 red traces, is that really all the copper you have on the top side of your board? Is there still copper everywhere else on the top layer that is simply not connected to your traces?

Also, isn't it best to make use of copper plates as much as possible? I would assume just using traces would cause more noise? Especially regarding power and ground. When looking at PCB design files on this site generally all I see are just traces and not plates... why is that?

Anyone else care to chime in when its best to use a copper plate versus a trace?
What you are referring to are Ground Planes...
It is always a good idea to use ground planes
when dealing with extreme low level signals and
High gain amplifiers...

This circuit is not using extremely low level signals
and the amplifier has a marginal level of gain.

It would not hurt to put ground planes but the circuit
is simple enough to not really require it..

From the pics of the PCB in the 1st post it is obvious
that the PCB design IS using Ground Planes on both
sides of the PCB...

The reason you can't see them on the 2 sided Artwork
is if they were visible you couldn't see the traces easily...


Jerry


__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-03-2011 at 06:47 PM. Reason: Spelling errors
lasersbee is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 07-03-2011, 07:37 PM #18
Kmor2004's Avatar
Class 2 Laser
 
Join Date: Jun 2011
Location: ohio
Posts: 292
Rep Power: 12
Kmor2004 is just really niceKmor2004 is just really niceKmor2004 is just really niceKmor2004 is just really niceKmor2004 is just really nice
Kmor2004 Kmor2004 is offline
Class 2 Laser
Kmor2004's Avatar
 
Join Date: Jun 2011
Location: ohio
Posts: 292
Rep Power: 12
Kmor2004 is just really niceKmor2004 is just really niceKmor2004 is just really niceKmor2004 is just really niceKmor2004 is just really nice
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

I'd almost say if he's using eagle cad (the most popular one for hobbyists) he might not have re-named the plane to ground hence the dotted line or he used some way of not showing it in the picture can't remember for sure though.

Also using ground planes are especialy nice if you are doing some tightly spaced parts and auto-trace can't get anything and manual tracing is giving you a hard time.
__________________
Pointy=MY 532nm $12 amazon LP overspec 10mw
Lazerer Cyber Black 50mW
Black magic the 445nm 1.242W roaster in for repairs Pill died
LPF monster 445nm 1.132W peak June give away
Hotlights 405nm 100mW
Laser lighter 660nm 360mW

Icon Solo 2x10440 ----deciding on Diode and driver

Thanks JakeGT for LPM'ing my Reference lasers
Kmor2004 is offline   Reply With Quote
Old 07-03-2011, 09:38 PM #19
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,442
Rep Power: 19481
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,442
Rep Power: 19481
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

Quote:
Originally Posted by piferal View Post
@ Benm

Also, the other differences and the main reasons that yours is more cheaper, they are.

The one you say is smaller 8 x 8 x 3.6 mm, the other is 8.4 x 8.4 x 2.3mm

Yours has a much lower number of Couples, only 7 couples (14 pellets, 7 N and 7 P), and this of Jufran88 has 31 Couples (62 pellets, 31 N and 31 P)

Apart from this, the voltage, amperage and temperature, which are also different in the 2 models, and this can be seen easily in the datasheets.
These difference are obvious indeed, perhaps i should have phrased it differently: Is there any good reason the cheaper TEC will perform less in this specific application?

I doubt the temperature maximum of 125 would be a problem unless you fire extremely powerful lasers at it. The number of junctions is another matter: does it greatly affect things like signal noise ratio, or is it just a matter of applying more amplification?
Benm is online now   Reply With Quote
Old 07-03-2011, 10:36 PM #20
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

The Professional Thermopile heads like some Gentec and Scientec
heads use a special TEC that has a very high P/N thermocouple
junction count...
Here is a Gentec....



It makes sense that the higher the count.... the more uniform the
active surface as wellas a higher signal level output...

That does not mean that the less expensive and lower junction cell
will not work...


Jerry
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-03-2011 at 10:36 PM.
lasersbee is offline   Reply With Quote
Old 07-03-2011, 11:03 PM #21
HaloBlu's Avatar
Class 3R Laser
 
Join Date: Dec 2009
Location: 11.69,143.70
Posts: 1,327
Rep Power: 48
HaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond repute
HaloBlu HaloBlu is offline
Class 3R Laser
HaloBlu's Avatar
 
Join Date: Dec 2009
Location: 11.69,143.70
Posts: 1,327
Rep Power: 48
HaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond reputeHaloBlu has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

Whats the size of the Gentec TEC? You wouldn't have more pics of that?
Didn't know professional thermopiles just screw open so easy!
__________________
«Hålø» Openwrt Piranha! Debian on DockStar. 405nm=Crack 445=CrystalMeth RGB=Ecstasy
Custom PCB GB . .Raspberry Pi $25 PC
'If it doesn't burn a hole in the wall then it's okay for my eyes.' *cute little smile* . .Buy Goggles! OEM, Survival
.

Last edited by HaloBlu; 07-03-2011 at 11:07 PM.
HaloBlu is offline   Reply With Quote
Old 07-03-2011, 11:11 PM #22
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

The photo is from this Thread...

http://laserpointerforums.com/f42/gentec-ps-310wb-thermopile-61640.html#post873640


Jerry
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner
lasersbee is offline   Reply With Quote
Old 07-04-2011, 08:16 AM #23
Jufran88's Avatar
Class 2M Laser
 
Join Date: Feb 2011
Location: Southern California
Posts: 573
Rep Power: 81
Jufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond repute
Jufran88 Jufran88 is offline
Class 2M Laser
Jufran88's Avatar
 
Join Date: Feb 2011
Location: Southern California
Posts: 573
Rep Power: 81
Jufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

Quote:
Originally Posted by random person View Post
Sorry, got a question for you since i'm very new to PCB design.

When looking at

Apart from the VIAs and the 2 red traces, is that really all the copper you have on the top side of your board? Is there still copper everywhere else on the top layer that is simply not connected to your traces?

Also, isn't it best to make use of copper plates as much as possible? I would assume just using traces would cause more noise? Especially regarding power and ground. When looking at PCB design files on this site generally all I see are just traces and not plates... why is that?

Anyone else care to chime in when its best to use a copper plate versus a trace?
Actually there are no vias on my PCB, Jib gave me the idea to use through hole pots to do away with the vias I previously had and the use of screw type connectors. They are really handy instead of soldering - desoldering - resoldering.

You can't see the ground planes on that picture because I didn't run the ratsnest when I took that picture. But if you look at the pics I took of the actual PCB you can easily see the ground planes aka "copper pour" areas.

If your etching your board by hand its a lot easier to leave more copper on the board and saves on etchant. They also make the board sturdier giving it more longevity and provides a better thermal relief due to high currents.

There are more technical reasons why the copper pour is important in PCB design because not only are they used to make power/ground planes but also provide EMI shielding for signal paths "traces". Isolation of the copper pour between traces, pads, holes becomes more important when high frequency/high current components are introduced. They create noise interference which can cause problems in some cases, that's why in some PCBs you see some areas of the circuits where there is no copper pour. I'm no PCB expert, but that's from my understanding so hopefully that helps?
__________________
FS: 3A selectable test loads *IN STOCK* - link

405nm 455 mA BDR-S06J GUIDESMAN (G2 Drive) - link
445nm 1500 mA A140 SOLARFORCE L2 GUNMETAL (FLEXDRIVE V5) - link
445nm 1566 mA A140 SIPIK HK21 (G2 Drive) - link
473nm B&W Tek BWB-10-OEM - 10mW
532nm SKY Lasers DPL - 200mW
638nm 1071 mA GUIDESMAN (AMC7135) - link
638nm 1053 mA SS 26650 (AMC7135) - link

LED Maglite 3D DD SST-90 5700K w/ Aspheric lens - link
LED Maglite 3D XM-L U2 bin - link
LED Maglite 2D Triple XM-L U2-1C bin - link

My DIY LPM - link
Jufran88 is offline   Reply With Quote
Old 07-04-2011, 10:50 AM #24
piferal's Avatar
Class 3R Laser
 
Join Date: Apr 2011
Location: Andorra
Posts: 1,280
Rep Power: 184
piferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond repute
piferal piferal is offline
Class 3R Laser
piferal's Avatar
 
Join Date: Apr 2011
Location: Andorra
Posts: 1,280
Rep Power: 184
piferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

@Benm, Sorry for the delay, I need to sleep and work a bit

Besides what Jerry said, who is the specialist,

IMHO the biggest problem can I see with your TEC is that it has a very small voltage range
(only 0.86 V), and with this simple LPM design, it can cause problems.

If the output of the TEC is larger, you need less gain from the op-amp,
and you have less noise and less error possibilities, that if you use a TEC with an output as low as yours.

Can it work? Is possible, but in my opinion not would choose your TEC for this LPM design.

Disadvantage of the other, well, is more expensive, yes, but worth it.

And the response time will be somewhat higher because of their greater mass
(have many more couples) but nothing to note.

Last edited by piferal; 07-04-2011 at 10:52 AM.
piferal is offline   Reply With Quote
Old 07-06-2011, 01:45 AM #25
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,442
Rep Power: 19481
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,442
Rep Power: 19481
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

I dont see a problem in the lower voltage itself - that could be amplified and compensated by a good opmap with a wide input range.

I am a but curious about what would be the most important factor in practical use: a sensor with fewer thermocouples would be faster, but one with more thermocouples could yield a better s/n ratio of the signal to measure.

Perhaps the only way to make sure is to give both a try.
Benm is online now   Reply With Quote
Old 07-06-2011, 06:37 AM #26
Class 1M Laser
 
Join Date: Apr 2011
Location: A random place in north dakota.
Posts: 213
Rep Power: 20
random person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud of
random person random person is offline
Class 1M Laser
 
Join Date: Apr 2011
Location: A random place in north dakota.
Posts: 213
Rep Power: 20
random person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud ofrandom person has much to be proud of
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

Whats wrong with using a thermistor again?
__________________


random person is offline   Reply With Quote
Old 07-06-2011, 09:08 AM #27
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

What do you mean with thermistor, exactly ?

If PTC or NTC sensor, it's not enough sensitive ..... same for "bare" thermocouples, except if you find a way for connect 10 or 20 of them in serie (i tested 10 thermocouples junctions and a small piece of black anodized Alu, once, it was linear enough, but not sensitive, i had to amplify the serie like 400 times, and at this range, the noise was too high and interferring too much)

Also, a thermistor is not a differential device ..... if you want to use thermistors, you can buy a lot of SMD types NTC sensors (there are in 1mmx0.5mm sizes too) and connect like 20 or 30 of them in serie, glued rear a plate ..... but then, you need 2 plates of them, one as laser target, and the other near it, exposed to the same air flows and ambient temperature, but totally light insulated, for use as reference ..... otherwise, each time the ambient temperature change, also a fraction of degree, your unit become uncalibrated.

Same if you want to use diodes ..... there are SMD diodes with very small size, that you can connect in serie and glue rear a small plate, obtaining a sensor with a small (relatively small) mass, but still you need a reference sensor for ambient temperature.

Thermocouples thermopiles and TECs instead are differential sensors ..... they read the difference between the 2 plates, so as long as you provide a decent reference thermal mass (a big block of aluminium or copper, said in poor words ) on the ref plate, once the thermal mass is stabilized with the ambient, the reading don't need to be continuously compensated from the ambient temperature.
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.

Last edited by HIMNL9; 07-06-2011 at 09:10 AM. Reason: typos ..... they're everywhere :p
HIMNL9 is offline   Reply With Quote
Old 07-06-2011, 11:02 AM #28
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

Quote:
Originally Posted by random person View Post
Whats wrong with using a thermistor again?
Your question is a bit vague... What again...
What exactly are you asking....

If you are asking if you could use a thermistor as a Laser
Power Sensor..... Sure you can.... but as H9 explained...
one thermistor is not sensitive enough and you will always
need to a 2nd identical Thermistor as a reference...


Jerry
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-06-2011 at 11:09 AM. Reason: Spelling errors
lasersbee is offline   Reply With Quote
Old 07-06-2011, 02:26 PM #29
piferal's Avatar
Class 3R Laser
 
Join Date: Apr 2011
Location: Andorra
Posts: 1,280
Rep Power: 184
piferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond repute
piferal piferal is offline
Class 3R Laser
piferal's Avatar
 
Join Date: Apr 2011
Location: Andorra
Posts: 1,280
Rep Power: 184
piferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

Quote:
Originally Posted by Benm View Post
I dont see a problem in the lower voltage itself - that could be amplified and compensated by a good opmap with a wide input range.

I am a but curious about what would be the most important factor in practical use: a sensor with fewer thermocouples would be faster, [COLOR="lime"]but one with more thermocouples could yield a better s/n ratio of the signal to measure.

Perhaps the only way to make sure is to give both a try.
Quote:
I dont see a problem in the lower voltage itself - that could be amplified and compensated by a good opmap with a wide input range.
Sure, but I'm talking about this simple LPM design in particular, I still say it would use the other TEC, but is my personal opinion.

Quote:
but one with more thermocouples could yield a better s/n ratio of the signal to measure
That is what I refer.

Moreover, as you say it would be interesting to test the 2 models of TEC and see the results.
piferal is offline   Reply With Quote
Old 07-07-2011, 07:09 AM #30
Wolfman29's Avatar
Class 3B Laser
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Wolfman29 Wolfman29 is offline
Class 3B Laser
Wolfman29's Avatar
 
Join Date: Jan 2011
Location: Davis, CA
Posts: 3,828
Rep Power: 227
Wolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond reputeWolfman29 has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

Nice build! Almost identical to mine, but a bit nicer looking on the interior (well, maybe?). I etched the board myself, and after playing around with the pots on both the panel and the board enough, I think I got it fairly well... reading good power outputs.
Wolfman29 is offline   Reply With Quote
Old 07-27-2011, 05:06 AM #31
Jufran88's Avatar
Class 2M Laser
 
Join Date: Feb 2011
Location: Southern California
Posts: 573
Rep Power: 81
Jufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond repute
Jufran88 Jufran88 is offline
Class 2M Laser
Jufran88's Avatar
 
Join Date: Feb 2011
Location: Southern California
Posts: 573
Rep Power: 81
Jufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond reputeJufran88 has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

I finally had my LPM calibrated from a very reputable member here and it works awesome now!
__________________
FS: 3A selectable test loads *IN STOCK* - link

405nm 455 mA BDR-S06J GUIDESMAN (G2 Drive) - link
445nm 1500 mA A140 SOLARFORCE L2 GUNMETAL (FLEXDRIVE V5) - link
445nm 1566 mA A140 SIPIK HK21 (G2 Drive) - link
473nm B&W Tek BWB-10-OEM - 10mW
532nm SKY Lasers DPL - 200mW
638nm 1071 mA GUIDESMAN (AMC7135) - link
638nm 1053 mA SS 26650 (AMC7135) - link

LED Maglite 3D DD SST-90 5700K w/ Aspheric lens - link
LED Maglite 3D XM-L U2 bin - link
LED Maglite 2D Triple XM-L U2-1C bin - link

My DIY LPM - link
Jufran88 is offline   Reply With Quote
Old 07-29-2011, 12:36 AM #32
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,837
Rep Power: 45117
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: My DIY Laser Power Meter ***PIC HEAVY***

Quote:
Originally Posted by Jufran88 View Post
I finally had my LPM calibrated from a very reputable member here and it works awesome now!
How about a video of your LPM testing a Laser...
What LPM did you calibrate it to...

Jerry
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner
lasersbee is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f42/my-diy-laser-power-meter-pic-heavy-64947.html
Posted By For Type Date
????????? This thread Refback 07-01-2011 02:05 PM










Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 09:40 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC