I got both sides of the driver populated yesterday and soldered on some small wire to the programming pads.
Tried testing the 841 but avrdude gave me errors. I knew this could be a problem since avrdude doesn’t support the 841.
Found someone who had a config patch file for avrdude that claimed to work with 841. I installed the patch file and now I get
error : program enable : target doesn’t answer. 1
initialization failed, rc=–1
double check your connections and try again. or use -f to override this check.
I’m trying to get this to work with a USBASP which most everyone has. I’m going to go through my wiring again.
All I can tell about what pad is what on the driver is by loneoceans PogoProg. I found vcc and ground and assuming all the others are correct as on the PogoProg I should have it wired correctly but I will check again anyway.
I used a heated lab stirrer with a chunk of aluminum setting on top of the hot plate to help spread the heat and drop the temp some. I used a old pcb board and tested at what setting my reflow solder began to melt, noted how long it took to get to that temp and ran a few test that were very repeatable. When I felt confident with the settings I placed the coil and the boost converter on the board and began to reflow. Worked like a charm. Populated the coil side of the pcb with all the other components and used the hot plate again.
Flipped the board over and started working in 1/4’s (like a slice of pizza) of the board. Set 5 or 6 components and used the hot air station to reflow them. Then began another 1/4 until I was done. I tried to always watch what component I was setting next so as I didn’t make it difficult on me setting the next one (nobody in the way).
The only problem if you wanna call it that, I had was setting the temp sensor. This thing is tiny and has four legs that point straight down. Its hard to see if its reflowed on all the legs, it’s tiny and I had a magnifying headband on. I actually didn’t even see it beside the huge coil when I populated the coil side the first time.
Glad you got it working schizobovine, at least I know now it can be done. Great job .
What programmer are you using.
Edited: I see in your post USBTiny ISP