We found this good amplifier in a Japanese publication of 1966. Transformers are uncommon nowadays and the power supply is included. Power is a few watts.
This circuit is designed to activate an automotive alarm after 8 minutes of activation. Of course...
We found this complementary simetry configuration in a1980s documentation. Transistors, which are...
Servo motors operate from the changes in the pulse width in a range between 1 and 2 ms. The...