This circuit controls 6 LEDs in two sets with the phase change cycles controlled by a 555 oscillator. The circuit can be powered by voltages between 6 and 12 V.
This circuit activates a relay when the water reaches the sensors. The circuit is from a magazine...
The circuit, from Motorola's 1993 Linear Interface ICs, uses an unusual operating system today....
Decade counters, such as the 4017, can be cascaded as sourcing signals with the frequency divided...