This circuit is used in magnetic tape recorders, having been found in documentation in the 1960s. The circuit uses Japanese transistors, and the critical components are transformers.
In the circuit that uses a PIC16F84, the audio present at the input will have its level controlled by...
August 2017 - STMicroelectronics' new T850 switches with triacs up to 8 A can be obtained from...
This circuit was found in an American documentation from 1969. The circuit is a multi-indicator with...