Found in an American documentation from the 90s, this circuit uses small low voltage lamps (6 to 12 V0. The circuit can be adapted to use LED indicators.
Originally intended to detect EMPs produced by tests or atomic blasts, this interesting circuit...
This circuit triggers a small water pump when the humidity detected by the sensor is reduced in a...
This circuit was found in Maxim's documentation from the 90's. The configuration uses components...