1E)
This circuit was found in a Popular Electronics from the 90s. The circuit generates different control signals over the same line. The transistors are from the era.
This circuit has an interesting application. If a device with the selector switch in the 110 V...
The basic idea of this circuit is to convert the indication of a magnetic sensor to an audio tone...
This circuit can control the power from 0 to 70% of the maximum power on a load. The circuit was...