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 > Tutorials, Help & Repairs



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



Reply
 
LinkBack Thread Tools Display Modes
Old 12-27-2008, 09:41 AM #1
ndrew2505's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
ndrew2505 ndrew2505 is offline
Class 3B Laser
ndrew2505's Avatar
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
Default small help with a circuit

ok so i suck with schematics so can some one help by telling me where the n1 and n2 pins would go in this schematic? i.e. n1 to neg; n2 to pos...

http://www.zen22142.zen.co.uk/Circui...ing/coldsw.htm


ndrew2505 is offline   Reply With Quote







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







Old 12-27-2008, 12:10 PM #2
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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 online now
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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: small help with a circuit

Quote:
Originally Posted by drew
ok so i suck with schematics so can some one help by telling me where the n1 and n2 pins would go in this schematic? i.e. n1 to neg; n2 to pos...

http://www.zen22142.zen.co.uk/Circui...ing/coldsw.htm
Hey Drew...
I can't see any n1 or n2 pins on the schematic.... where did you get (n1) and (n2).. :-?

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 online now   Reply With Quote
Old 12-27-2008, 08:16 PM #3
ndrew2505's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
ndrew2505 ndrew2505 is offline
Class 3B Laser
ndrew2505's Avatar
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
Default Re: small help with a circuit

a friend told me i was supposed to use the 2 offsets(n1 & n2) on the op amp along with along with the vin+&- and the out pin. i suck at schematics so im kinda lost. ive tried building the circuit 4 times and everytime the op amp gets hot so i know im hooking something up wrong just not sure what... :-/
ndrew2505 is offline   Reply With Quote
Old 12-27-2008, 08:42 PM #4
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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 online now
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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: small help with a circuit

Quote:
Originally Posted by drew
a friend told me i was supposed to use the 2 offsets(n1 & n2) on the op amp along with along with the vin+&- and the out pin. i suck at schematics so im kinda lost. ive tried building the circuit 4 times and everytime the op amp gets hot so i know im hooking something up wrong just not sure what... :-/
There is only one offset pin on the LM741 OP Amp... it is pin #1 and you DO NOT need it for this
circuit.

Which exact OP Amp part number are you using... and do you have a copy of the data sheet so you
know the pinouts... :-?

Here is a data sheet... http://www.fairchildsemi.com/ds/LM/LM741.pdf

I think you are referring to the Inverting Input (IN1) Pin #2 of the 8 pin IC and the Non Inverting
Input (IN2) Pin #3 of the IC.

All you need to do is follow the schematic like a road map (Point A to Point B)
The only pins of the OP Amp you need to connect are:

Pin #2 goes to the junction of the 100k Pot and the Thermistor

Pin #3 goes to the junction of the two 10K and one 270K Resistors

Pin#6 goes to the Junction of the 270K and 4K7 Resistor

Pin #7 goes to the Positive Supply

Pin #4 goes to the Ground (the Negative Supply)

No other connections to the OP Amp are required for this circuit...

Since your OP Amp got hot... there is a good chance that it is fried..
Use a new part and try it again... The circuit is simple enough that
you should have no problems if you just follow the road map (schematic).

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 online now   Reply With Quote
Old 12-27-2008, 08:58 PM #5
ndrew2505's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
ndrew2505 ndrew2505 is offline
Class 3B Laser
ndrew2505's Avatar
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
Default Re: small help with a circuit

http://focus.ti.com/lit/ds/symlink/ua741.pdf

this is the opamp im using. i guess i was told wrong about something.. :-? i also think the opamp was getting hot b/c it was hooked up wrong....
ndrew2505 is offline   Reply With Quote
Old 12-27-2008, 09:04 PM #6
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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 online now
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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: small help with a circuit

Quote:
Originally Posted by drew
http://focus.ti.com/lit/ds/symlink/ua741.pdf

this is the opamp im using. i guess i was told wrong about something.. :-? i also think the opamp was getting hot b/c it was hooked up wrong....
Are you using the 14 pin IC or the 8 pin IC... :-?

The pin numbers are NOT the same for the two types... one is a dual Op Amp and
the other is a single Op Amp...
The Pin Numbers I quoted above are for the 8 Pin OP Amp IC.
__________________

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 online now   Reply With Quote
Old 12-27-2008, 09:09 PM #7
ndrew2505's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
ndrew2505 ndrew2505 is offline
Class 3B Laser
ndrew2505's Avatar
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
Default Re: small help with a circuit

oops my bad ;D im using the 8pin ic. :

ill try rebuilding it after work tonight but ive got to leave in a few so i dont have time. i suck at reading schematics.... :
ndrew2505 is offline   Reply With Quote
Old 12-27-2008, 09:17 PM #8
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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 online now
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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: small help with a circuit

Just take it slow a methodically and you'll get it... it's really not that
difficult...

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 online now   Reply With Quote
Old 12-27-2008, 09:27 PM #9
ndrew2505's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
ndrew2505 ndrew2505 is offline
Class 3B Laser
ndrew2505's Avatar
 
Join Date: Feb 2008
Posts: 2,824
Rep Power: 243
ndrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond reputendrew2505 has a reputation beyond repute
Default Re: small help with a circuit

i know its not that difficult but i dont know how to read some schematic details and was told to use the wrong pins. thanks for the clarification jerry.
ndrew2505 is offline   Reply With Quote
Old 12-27-2008, 11:22 PM #10
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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 online now
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,823
Rep Power: 44598
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: small help with a circuit

Quote:
Originally Posted by drew
i know its not that difficult but i dont know how to read some schematic details and was told to use the wrong pins. thanks for the clarification jerry.
If you need an explanation of a part or the way it is connected on this circuit... you can PM me..
__________________

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 online now   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











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 10:13 AM.


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