This circuit is the digital indicator for the previous circuit and can be used with similar circuits. The circuit is from an article in Radio Electronics magazine, June 1987.
The circuit presented is a 10 MHz oscillator with crystal, which already has several splitters for...
This circuit uses a sensitive vibrator that can be made with a reed-switch to activate a relay from...
The sensor of this circuit is an NTC with a resistance between 200 and 1000 ohms. The resistor R1 must...