Found in a 90s Hands On Electronics, this small preamp finds applications like microphones and other sources. Its gain is 3 dB with a response of 120 to 20 000 Hz.
For trigger high power loads connected to the power grid, nothing better than using a TRIAC. For...
This circuit with 1% regulation aims at replacing mercury cells. We found it in a 1967...
With this circuit it is possible to control a relay up to 100 mA with an extremely low input...