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.
This circuit is from Motorola documentation from the 70s. The transistors support modern...
We found this shield circuit in a 1991 technical documentation. The phototransistor can be...
This sonic control circuit for a small robot turtle was obtained in an American documentation from 1967....