Found it! Was looking for this thread..... Mike, if you're still around - I've been using the circuit you provided and it's been working for two years or so now. I'm re-doing the whole sculpture, improving the power supply circuitry and replacing the SLA with a 58F 16V capacitor. I'm making pcboards for everything and would like to use this low voltage disconnect circuit to save the charge on the supercap overnight. I wondered if you could give me new resistor values to drop the low and high voltages to 7 and 9? I remain grateful for your help last time around!
thanks/best
Mark M.