I've assembled this Ethernet Link Tester using a 23A (12v) battery and momentary switch and it works great. Now I'd like to add a timer circuit to it so that the transceiver is on 2-3 seconds then off 2-3 seconds. I mounted the battery, switch and female DB15 plug in a Radio Shack 270-283 project box so that I have room for the timer circuit.
The timer circuit will be connected to an on/off switch but I'd also like to use the momentary switch to bypass the circuit and power the transceiver directly.
I'm assuming I'll need a 555 chip and a relay (which would power the transceiver) but beyond that I don't have a clue how to proceed. I'd like to have both the timer circuit and the transceiver be powered by a single 23A battery, but I don't know what the duty life of the battery would be.
Any help with this would be greatly appreciated.
Mez
The timer circuit will be connected to an on/off switch but I'd also like to use the momentary switch to bypass the circuit and power the transceiver directly.
I'm assuming I'll need a 555 chip and a relay (which would power the transceiver) but beyond that I don't have a clue how to proceed. I'd like to have both the timer circuit and the transceiver be powered by a single 23A battery, but I don't know what the duty life of the battery would be.
Any help with this would be greatly appreciated.
Mez