Water pump controller circuit for you
You may like phototransistor light switch controller circuit. Use photo transistor-light sensor and Schmitt Trigger CMOS as output driver to load and more.
You should build Simple Differential temperature controller circuit diagram. It will turn on the relay switch, when both temperature sensor is different.
This is simple automatic water level controller circuit. It will make you more comfortable Because it enables open - close water pump automatically[...]
This is first mini emergency light of my son. It is very small, use LED display when power outage,use transistor instead relay use AA battery charger.
This is IC 4060 Timer circuit. When rises time that is set, Suppose set 5 minutes time. after all time to 5 minutes. the circuit will emit a sound of buzzer once. [...]
The OFF After Delay circuit on Breadboard using MOSFET
For learn about MOSFET. I recommend Time Delay circuit easy to make and long time and a few parts than normal transistor