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The ABSOLUTE Cheapest Proper Diode driver

icecruncher

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Fooling around with some old LOC reds and some of the $2.50 reds off Ebay. I didn't want to spend for a pricey driver. SO, here is the minimum AMC7135 driver. It will give 350ma on a 10440 AAA or any single cell rechargeable. It doesn't need heatsink and although the diode will get warm after a few minutes it is not pushing the Long Open Can or the cheap Ebay reds to the max so they should last a long time. But it is still very capable of burning.

I haven't seen this posted as assembled this way, they are always shown as a board, when in reality its not needed if you can solder decently. It fits nicely In the back of the aixiz module also, but keep in mind these are VERY SMALL parts. I soldered to the back of the amc7135 for the center post, which makes it a touch easier.

1. Red wire is attached from the Diode positive the right pin of the amc7135 (covered in yellow heat shrink tubing) and to the positive battery terminal
2. First Blue wire goes from the diode negative to the left pin of the amc7135 (covered in yellow heat shrink tubing)
3. Second Blue wire goes from the center pin of the amc7135 to the negative battery terminal.
Cover the connections and DONE
 

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RA_pierce

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I've seen this before. It is a nice solution especially where small size is concerned.
You could also string a couple in parallel to drive something like the Sharp 638 nm multimode diodes at 0.7 A.
Now that I think of it... Maybe I'll try that if I still have some AMC7135s in my spare parts box...
 

Mattronium

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That AMC7135 also come in a special version for 380mA. I think the AMC7135 is an obsolete part by now, so it might be hard to find.
 




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