This circuit uses a transistor as a sensor and operates in the range of 0 to 50º C. We found it in old documentation. Operational equivalents can be used.
This small transmitter can send its signals to a receiver placed at distances up to 100 m. The...
This transistorized siren was found in Popular Electronics from April 1967. The signal must be...
We show only one of the channels of an excellent audio preamplifier with the LM382 integrated...