I was hoping to help a workmate out with a simple grey water pump
control using a cheap 12v DC bilge pump.
Starting with a 555 circuit and relay just to get the initial part
working, thought it'd be easy to find a way to switch the 555 off
using current feedback when the pump was 'dry running'.
No luck there in finding a 'simple' solution (and I Googled till my
fingers bled).
BTW, although I could use a microcontroller didn't really want to add
a 5v power supply to the board.
His missus doesn't want any extra wires hanging around, so float
switches etc. are out.
Any ideas on the best way to do this?
control using a cheap 12v DC bilge pump.
Starting with a 555 circuit and relay just to get the initial part
working, thought it'd be easy to find a way to switch the 555 off
using current feedback when the pump was 'dry running'.
No luck there in finding a 'simple' solution (and I Googled till my
fingers bled).
BTW, although I could use a microcontroller didn't really want to add
a 5v power supply to the board.
His missus doesn't want any extra wires hanging around, so float
switches etc. are out.
Any ideas on the best way to do this?