after a lot of of reading and studying, I came up with a schematic that I
think will work.
It's a current limiter that limits the current at about 100mA, with a
control transistor (Q3), so that a microcontroller can turn the circuit on
what do you think about this?
I think that if you'd have been reading and studying (even if you
learned nothing) before the 1st post and the lazy while we work
comment, you'd have gotten more action than my flame and this, dude
Please view this totally cool (read appropriate) circuit in a
fixed-width font such as Courier.
I gave you a perfectly good link you can hack to control it on and
off but it goes to trickle mode when it's done anyway. What did you
think of that? It can be stripped down to a 7805 in current source
config and you just turn it on and off or use the VMOSFET.
You want to charge what from a 9V batt? Your robot or your fuzz
Bob Monson's circuit can be turned on and off also.
OK, your link. it's a 120mA approx current source that you can turn
off and will run off a 9V batt for a couple hours until you need to
charge the 9V batt. You're not serious, are you? You couldn't find
the V source part, right? Your resistor values are non standard.
decades of 5.1 and 8.2 are available.