This circuit triggers an LED when the input signal exceeds the peak, or the value set in RV1. The transistors can be the modern equivalents BC549.
This powerful source is indicated for FM transmitters above 2 W. It provides 18.2 V of output with...
This simple circuit is designed to charger AA or AAA Nicad batteries. Current can be changed...
This amplifier uses hybrid modules Sanken and can provide powers of 10 W or 20, depending on the...