jpmorris
Tape Wolf
Just short out the trimmer. The voltage will be low but you can 'tack in' various values until you hit 5V +-say 5%. In fact the only reason a trimmer was used I guess was to save this process in production? Much better to find a fixed value. Try 3 values, do a graph!
Dave.
The trimmer seems to be working correctly. However, pin 2 of the STK772B just popped off the solder pad. Whether it was intermittent before and that has caused it to go screwy, or whether it has just broken from being handled too much over the last few days, I couldn't say. The chip is weighed down by a massive heatsink and is just dangling off the pins and I was afraid something like this might happen. I already have a DC-DC converter due to arrive, so at this point I'm more interested in replacing it, though it might make an interesting project for the future.