Old 11-04-2014, 04:03 AM #353
crazyspaz's Avatar
Class 3B Laser
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 10397
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
crazyspaz crazyspaz is offline
Class 3B Laser
crazyspaz's Avatar
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 10397
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by Laser Project View Post
This is what I use for small solder work but the oven sounds better, once parts are placed.

And here I am using a soldering iron. Must be one hot microscope


crazyspaz is offline   Reply With Quote


















Old 11-04-2014, 04:10 AM #354
Alaskan's Avatar
Super Moderator
 
Join Date: Jan 2014
Location: Great White Frozen North
Posts: 9,203
Rep Power: 1081900
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Alaskan Alaskan is offline
Super Moderator
Alaskan's Avatar
 
Join Date: Jan 2014
Location: Great White Frozen North
Posts: 9,203
Rep Power: 1081900
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

I'm close to 60 years old, can't see for crap close up anymore
__________________

Attention new brothers of the collimated light!

Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
Alaskan is offline   Reply With Quote
Old 11-04-2014, 12:49 PM #355
IWIRE's Avatar
Class 2M Laser
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 249
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
IWIRE IWIRE is offline
Class 2M Laser
IWIRE's Avatar
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 249
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
Default

Quote:
Originally Posted by rhd View Post
It's really a simple approach if you don't over complicate it.
What do you put the drive on ? Do you put it on a little sheet or something ? I don't have a toaster oven but will get one if it makes my life easier.

I have a microwave, would that be faster j/k
__________________

He said "Let there be light !",
and there was,
and it was good.
So we amplified it.
IWIRE is offline   Reply With Quote
Old 11-04-2014, 02:53 PM #356
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by IWIRE View Post
What do you put the drive on ? Do you put it on a little sheet or something ? I don't have a toaster oven but will get one if it makes my life easier.

I have a microwave, would that be faster j/k
My toaster oven came with a little removable tray.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 11-04-2014, 03:11 PM #357
IWIRE's Avatar
Class 2M Laser
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 249
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
IWIRE IWIRE is offline
Class 2M Laser
IWIRE's Avatar
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 249
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
Default

Quote:
Originally Posted by rhd View Post

My toaster oven came with a little removable tray.
Thanks. I just happen to have a gift card to Target in my pocket. I'll stop after work and see what I can find. I had actually been wanting a toaster oven, I probably need to make this one just for boards.
Something about fixing food in something used to melt solder doesn't seem right.
I use my oven to bake on enamel paint though.
Hasn't affected me. I'm completely normal.
__________________

He said "Let there be light !",
and there was,
and it was good.
So we amplified it.
IWIRE is offline   Reply With Quote
Old 11-04-2014, 03:15 PM #358
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by IWIRE View Post
Thanks. I just happen to have a gift card to Target in my pocket. I'll stop after work and see what I can find. I had actually been wanting a toaster oven, I probably need to make this one just for boards.
Something about fixing food in something used to melt solder doesn't seem right.
I use my oven to bake on enamel paint though.
Hasn't affected me. I'm completely normal.
Good call. You really don't want to be using an oven that has reflowed lead-based solder, for food
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 11-04-2014, 03:26 PM #359
IWIRE's Avatar
Class 2M Laser
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 249
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
IWIRE IWIRE is offline
Class 2M Laser
IWIRE's Avatar
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 249
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
Default

Quote:
Originally Posted by rhd View Post

Good call. You really don't want to be using an oven that has reflowed lead-based solder, for food
I'll just get a little one for this. My solder paste Paul recommended showed up yesterday, I'm going to try applying it with a toothpick like you suggested in a previous post and using your oven tip.
I'm going to get this reflow thing down yet.
Thanks for the tips !
__________________

He said "Let there be light !",
and there was,
and it was good.
So we amplified it.
IWIRE is offline   Reply With Quote
Old 11-04-2014, 03:36 PM #360
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by IWIRE View Post
I'll just get a little one for this. My solder paste Paul recommended showed up yesterday, I'm going to try applying it with a toothpick like you suggested in a previous post and using your oven tip.
I'm going to get this reflow thing down yet.
Thanks for the tips !
Whatever amount of paste you think you need, halve that.

Best reflow soldering advice anyone ever gave me
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 11-04-2014, 05:50 PM #361
IWIRE's Avatar
Class 2M Laser
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 249
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
IWIRE IWIRE is offline
Class 2M Laser
IWIRE's Avatar
 
Join Date: Dec 2013
Location: Oklahoma
Posts: 630
Rep Power: 249
IWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond reputeIWIRE has a reputation beyond repute
Default

Quote:
Originally Posted by rhd View Post

Whatever amount of paste you think you need, halve that.

Best reflow soldering advice anyone ever gave me
Thanks for passing the advice on. I'm pretty sure that was part of my initial failure. You would have rightfully laughed at me. I even laughed. I had solder paste everywhere. I even watched videos on how to do it. It looked really easy.

Edit: I now have a stainless steel Black & Decker toaster oven. It was on sale ! My electronics bench is becoming rather bizarre, soldering/reflow station, PS, 2 LPM's, 2 battery chargers, Owon scope, Fluke meter, benchtop multi-meter and now a toaster oven. LOL ! My garage looks like a machine shop and one bedroom looks like a mad scientist with an appetite lives there. I haven't even been in this hobby a year yet !
__________________

He said "Let there be light !",
and there was,
and it was good.
So we amplified it.

Last edited by IWIRE; 11-05-2014 at 12:40 AM.
IWIRE is offline   Reply With Quote
Old 11-05-2014, 02:44 AM #362
crazyspaz's Avatar
Class 3B Laser
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 10397
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
crazyspaz crazyspaz is offline
Class 3B Laser
crazyspaz's Avatar
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 10397
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by rhd View Post
Whatever amount of paste you think you need, halve that.

Best reflow soldering advice anyone ever gave me
Yea, no kidding. I went ahead and globbed a big smear of paste on there thinking "Yea, that'll do it" and then was surprised when there was a bunch of paste left over, and the solder masks were nearly caked together with the stuff
crazyspaz is offline   Reply With Quote
Old 11-05-2014, 02:50 AM #363
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by ARG View Post
Awesome! Thanks!

I've got a Fluke DMM that can handle 10A, should be fine
I forgot to mention - I was slow on the mailing, but I finally sent out the 10A buck & test load a couple days ago.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 11-06-2014, 02:39 AM #364
crazyspaz's Avatar
Class 3B Laser
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 10397
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
crazyspaz crazyspaz is offline
Class 3B Laser
crazyspaz's Avatar
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 10397
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Alright, tried again, and realized I hurrdurr'd somethin fierce. I thought my rework station was in Celsius (would make sense, right?) but evidently not....turned up the temp and it worked like a charm. However, when I went to test it with a test load, a few things happened:
1) it emitted a very high pitch tone, even though Vload>Vbattery. Tone lowered in frequency as I increased the current (and thus the load voltage)
2) I fiddled around with the number of diodes (don't have a current&voltage chart handy for them) and when I got it to around 5V (thinking 445) it not only would not increase past ~1700mA (using 2x.15ohm set resistors), but got very, VERY hot very quickly. I am pretty sure I actually burned my finger a bit.
edit: as it heated up, the current output started to drop steadily, and I imagine it would have continued to drop if I would have left it powered on.

Have any clue what this would be due to? There are no shorts anywhere, no broken parts, everything is where it should be.

Last edited by crazyspaz; 11-06-2014 at 02:45 AM.
crazyspaz is offline   Reply With Quote
Old 11-06-2014, 02:55 AM #365
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by crazyspaz View Post
1) it emitted a very high pitch tone, even though Vload>Vbattery. Tone lowered in frequency as I increased the current (and thus the load voltage)
Why would you have been limiting input current ?!? When testing a boost driver from a bench PSU, you want your current unlimited (PSU max) and your voltage set at roughly 3.7V.

Quote:
Originally Posted by crazyspaz View Post
2) I fiddled around with the number of diodes (don't have a current&voltage chart handy for them) and when I got it to around 5V (thinking 445) it not only would not increase past ~1700mA (using 2x.15ohm set resistors), but got very, VERY hot very quickly. I am pretty sure I actually burned my finger a bit.
edit: as it heated up, the current output started to drop steadily, and I imagine it would have continued to drop if I would have left it powered on.
Provide us with the model of the diodes, the diode count, and the resistance of the resistor on your test load (if one was used).
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 11-06-2014 at 02:56 AM.
rhd is offline   Reply With Quote
Old 11-06-2014, 03:17 AM #366
crazyspaz's Avatar
Class 3B Laser
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 10397
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
crazyspaz crazyspaz is offline
Class 3B Laser
crazyspaz's Avatar
 
Join Date: Jul 2012
Location: IN, United States
Posts: 2,863
Rep Power: 10397
crazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond reputecrazyspaz has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by rhd View Post
Why would you have been limiting input current ?!? When testing a boost driver from a bench PSU, you want your current unlimited (PSU max) and your voltage set at roughly 3.7V.



Provide us with the model of the diodes, the diode count, and the resistance of the resistor on your test load (if one was used).
Nonono, I meant as I increased output current. Sorry 'bout the wording there.

The test load is one of Jufrans 3A test loads, so 1N5404 diodes and a 1 ohm resistor. I used 4 diodes, which gave a total Vdrop of ~5.2ish volts @ 1.8ishA. And 1.8A was/is the max current it will output with this Vdrop- it won't go any higher. Faulty pot, maybe, or something else? Also, and I just went and tested this again, the driver starts heating up as soon as I power it (using the above config on my test load). The inductor heats up which rapidly heats the rest of the driver.

Last edited by crazyspaz; 11-06-2014 at 03:19 AM.
crazyspaz is offline   Reply With Quote
Old 11-06-2014, 03:26 AM #367
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 3580
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Quote:
Originally Posted by crazyspaz View Post
Nonono, I meant as I increased output current. Sorry 'bout the wording there.

The test load is one of Jufrans 3A test loads, so 1N5404 diodes and a 1 ohm resistor. I used 4 diodes, which gave a total Vdrop of ~5.2ish volts @ 1.8ishA. And 1.8A was/is the max current it will output with this Vdrop- it won't go any higher. Faulty pot, maybe, or something else? Also, and I just went and tested this again, the driver starts heating up as soon as I power it (using the above config on my test load). The inductor heats up which rapidly heats the rest of the driver.
I don't know. Frankly, I hate pots, and never use them, for pretty much this reason. My perspective (and I've held it for a long time) is that people should set the currents they need, and not rely on a crappy 40 cent component to control the current to their diodes. I have never liked the behavior of pots on drivers, with the possible exception of the $5 multi-turn pot I put on the 10A buck driver I sent ARG. That one behaved fairly well, and gave me the range I was expecting.

That said, I'm pretty sure the cheap single turn pots have ginormous +/- tolerances... maybe even as high as 10%?

EDIT: I was wrong about tolerance... lol... I wasn't ginermous enough. Turns out those single turn pots have +/- tolerances of 25% !
http://www.digikey.ca/product-detail...1ECT-ND/612891

So I'm basically no help to you on this point, sorry Someone who uses the pot-version may be able to help. But I would suggest just ditching them and setting fixed current properly.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 11-06-2014 at 03:28 AM.
rhd is offline   Reply With Quote
Old 11-06-2014, 03:39 AM #368
ARG's Avatar
ARG ARG is offline
Class 4 Laser
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 7764
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
ARG ARG is offline
Class 4 Laser
ARG's Avatar
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 7764
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
Default Re: OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

Agreed with RHD. Set it and forget it. Unless there is no other way I try and avoid pots.

Try replacing the pot with a resistor and see if it works? The pads should be close enough for an 0603 replacement.
ARG 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

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 11:00 AM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC