I am very new to electronics (but hopefully learning fast) and am looking for a way of turning off a pump (via the water bridging a simple pair of probes at the top of the tank) in a timed flood and drain hydroponics irrigation set up, where the tank is dry between pumping periods.
The required repeat timer I have found (courtesy of Ron) at **broken link removed** but the override turn off I cannot work out. Could anyone help me please?
The required repeat timer I have found (courtesy of Ron) at **broken link removed** but the override turn off I cannot work out. Could anyone help me please?