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The Tale of the Ghetto Driver

Toaster

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Did you watch where i tested that the resistance is 2.1 at no load. They are all working. The test load, Is working, all the components are at least
 





Vaporizer

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In your tutorial thread, the pic of the dummy load...you should be able to measure voltage at the + & - points where it says "driver". Not resistance. With it connected to the battery you have to have a voltage output there. Since it's regulating the current, not voltage, I'd say you should see 9v there or abt because the dummy load hasn't stepped it down yet to simulate the diode.
 
Toaster

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I was testing the mV across the Resistor Which is how you test the mA Through the driver. The problem is the All or nothing current I am getting. I dont understand what You are even talking about tbh.
 
Vaporizer

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Yes, I saw that. You need to test the voltage + & - right at the driver output where it goes to the test load. The LD + & - points. It should read abt 9v. Set the pot to mid range on the driver.
 
Vaporizer

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If you have no voltage reading there, there is no way the dummy load can work. It's a method of troubleshooting a circuit.
 
Toaster

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I will try tomorrow but I dont see how I wouldn't as I am reading volts some times
 
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Across the battery there is ~8volts across the test load I am getting ~2.5v Does that Sound good?
 
Vaporizer

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I'll watch the vid agn. I don't know if I have that exact driver or not. You've mentioned, AixiZ, O-Like and your tutorial has a boost drive on it. Doesn't look like a boost.
If you have 2.5v at the test load where it connects to the driver, 4 diodes are gonna drop it 2.8v at the resistor. That seems like you have nothing left to measure.
 
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Toaster

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No, its the one from Aixiz_lasers ebay, it is identical to the O-like one with the TTL. The boost is for the project I am.tutorializing
 
Vaporizer

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Toaster,
I looked at mine and I didn't get a spec sheet? Emailed them and they are supposed to send one and Chuck is supposed to call me.
It's not exactly like the O-Like one. It is identical to this one:
New 650-980nm 20-250mW TTL Laser Diode Driver 4.0-5.0V - eBay (item 260633237615 end time Oct-08-10 00:42:08 PDT)
If you enlarge the green picture you can read it says when adjusting the current "Watch Null". In your vid you used the "not Null" LD-. That would indicate the adjustable output LD- is the Null one. Also this page shows operating voltage as 1ea 3.7-4.2 Li-Ion. I hope thats wrong or your 9v may have blown the driver. Hopefully it didn't have enough current. At this point I can't say whats right till Chuck calls or emails me the data spec sheet.

Chuck was out to lunch when I called AixiZ. I hope he can answers my questions, email me a copy of the spec/connection sheet and they need to correct the ebay ad on the TTL off & on. It shows in the pic that if the TTL isn't used "beam on". The description below says 0 - 2.5v Beam off! WTH?

Hope that is some help, I'll post after Chuck calls.
 
DTR

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I put together a 635 with a 5mW diode just to see the color. These diodes max somewhere near 70mA. I set mine to 60mA and got 11mW out of it. Neat color but I lost interest rather quickly. 11mW was not that fun.


This thread has some relevant info.

http://laserpointerforums.com/f50/troubleshooting-635nm-diode-44249.html#post587898

ndrew2505 said:
it is the same pinout as most reds. did you discharge the cap? i have similar diodes at modwerx for ~4$ if you need another...
Click to expand...

daguin said:
Did you try switching it to case positive? They come both ways.

I have a batch here that is case positive

Peace,
dave
Click to expand...

Krutz said:
mine are case positive. exact same diodes from same seller. they go up to 20mw consistently, then stay there independently from current. at around 70mA they reach 20mW. even at 80mA they didnt burn out. i tested 6 of 10, all exact the same.

if someone has case negative or case neutral 635nm diodes i'd really like to trade. either a few of mine case positive diodes or some other laser-parts. anyone?
(i simply dont have common positive drivers here and only have 3.7v for the diode)

manuel
Click to expand...

I used this pinout as it is to set the 635nm that I got from modwerx LINK So these must be case negative.
redpinoutwd9.jpg
 
Toaster

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Vaporizer said:
Toaster,
I looked at mine and I didn't get a spec sheet? Emailed them and they are supposed to send one and Chuck is supposed to call me.
It's not exactly like the O-Like one. It is identical to this one:
New 650-980nm 20-250mW TTL Laser Diode Driver 4.0-5.0V - eBay (item 260633237615 end time Oct-08-10 00:42:08 PDT)
If you enlarge the green picture you can read it says when adjusting the current "Watch Null". In your vid you used the "not Null" LD-. That would indicate the adjustable output LD- is the Null one. Also this page shows operating voltage as 1ea 3.7-4.2 Li-Ion. I hope thats wrong or your 9v may have blown the driver. Hopefully it didn't have enough current. At this point I can't say whats right till Chuck calls or emails me the data spec sheet.

Chuck was out to lunch when I called AixiZ. I hope he can answers my questions, email me a copy of the spec/connection sheet and they need to correct the ebay ad on the TTL off & on. It shows in the pic that if the TTL isn't used "beam on". The description below says 0 - 2.5v Beam off! WTH?

Hope that is some help, I'll post after Chuck calls.
Click to expand...

I didnt say it was an o-like, I said it was like an o-like. I have the link to the driver I bought on the first post. mine are from 80 mA to 500 mA. You have different drivers from me so it doesnt matter That much. I will try it using 2 AAAs and the null port for now. Then see what Is up with it there.
 
Vaporizer

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Toaster said:
No, its the one from Aixiz_lasers ebay, it is identical to the O-like one with the TTL. The boost is for the project I am.tutorializing
Click to expand...

I have the AixiZ driver from ebay too. I bought the 2 for $8 and I'm sorry to say it is NOT identical to the O-Like. The part and pad arrangement are totally different.
The link I provided IS identical to the Aixiz Driver , in appearence, and even uses the same green picture Aixiz does. They give different specs though.
I was just trying to help since you asked. I will quit since "it doesnt matter".
 
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