Sounds to me like you are driving the whole receiver with the
backup battery.
Typically, memory backup circuitry uses a pair of diodes to
isolate the +5V supply and the backup battery from each other.
Perhaps when they left the super cap off of the circuit board,
they installed a jumper wire where the +5V isolation diode would
need to be?
-Chuck Harris
jmfranke wrote:
Has anyone successfully used the onboard super capacitor or external
battery backup? I added the capacitor, but I still lose the memory
contents when I repower the receiver. I tried connecting a 4-5V
external supply to the battery backup (pin 3), but the pin draws 100mA.
John
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
