--- In Sumovore@yahoogroups.com, Bob Cook <bob@...> wrote:
>
> I've regularly run my Sumvore with rechargeable batteries without
> the sort of problems you are experiencing. Sounds like you have a
> different sort of problem, maybe a short on the brainboard?

Thanks. I just thought last night that the manual made no reference to
recharageable batteries, and I didn't want to chase stupid user
mistakes with a DMM and a soldering iron.

So tonight I went back with the soldering iron (brute force approach
to debugging), and I couldn't see any obvious faults, so I removes the
ICs and reheated all the soldering joints. I didn't notice any missing
soldering joints, or solder bridges, but I was suspicious of a couple
of IC pins, that I may have over bent the during the original
assembly, so I gently straightened them and reseated the ICs. After
doing this, my Sumovore strung to life with all the usual sanity.

I was also very glad my DMM had a simple frequency counter because I
was having a hard time setting the 555 timer to 38 kHz blindly. But
once tuned, it seems to be almost too sensitive, easily getting flase
triggers from itself (IR directly from the IR diodes).

Thank you.