Weird behaviour during and after flashing

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kelsey
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Weird behaviour during and after flashing

Another question about flashing firmware.. I recently ordered some Oshpark boards and thought I would try my hand at building my own drivers from components purchased myself (at Digikey in this case). The driver in question is this one: http://budgetlightforum.com/node/46159 I have tried flashing a number of firmwares onto it, namely "bistro" by ToyKeeper. (Love the firmware BTW.) I guess my question is this: since this driver is a dual channel driver but uses 7135 chips on both channels, is that a problem for using firmware such as bistro which is a dual channel firmware but is designed for a 7135+FET layout? If it is an issue, how might the firmware be tweaked to make it work? Back to the issue at hand, I have flashed the hex file (confirmed to be working on a 7135+FET driver) which flashed successfully, but when connecting the driver to power, nothing happens. Also, when hooking up the MCU to the clip, the led lights up. I have never had that happen when flashing the 7135+FET drivers.

Here is a shot of the driver:

d76J5P.md.jpg

Perhaps someone can identify if any of the components are wrong. 

Any help would be greatly appreciated.

Edited by: kelsey on 07/31/2020 - 11:45
ryansoh3
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The solder joints look good. Did you use solder paste and hot air?

This is the Attiny pinout from here: http://toykeeper.net/torches/x6v2/manker/bistro.c

If you have a multimeter, try probing the MCU pins while the driver is powered and see if everything is okay.

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kelsey
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I seem to have soldered the diode on backwards…

kelsey
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To answer your question, ryansoh3, I did use paste and hot air. Were you just curious, or does it make some kind of a difference? I always use solder paste for pcb work.

ryansoh3
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kelsey wrote:
To answer your question, ryansoh3, I did use paste and hot air. Were you just curious, or does it make some kind of a difference? I always use solder paste for pcb work.

Glad you fixed it.

I thought the solder job was done very well and was wondering how you did it. A soldering iron wouldn’t have turned out as nice.

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