This circuit triggers a small water pump when the humidity detected by the sensor is reduced in a flower bed or potted plant. The circuit must use a source according to the driven water pump.
Found in a 90’s Popular Electronics, this circuit uses two CMOS inverters to generate a signal of...
This 1965 Electronic Design circuit has short-circuit protection and is suitable for 20 V sources....
This filter was found in an American publication from the 1980s. The circuit can be implemented with...