We found this circuit in American documentation from the 1980s. Transistors can be of general use. The frequency range of the generated signals ranges from 500 kHz to 10 MHz.
Found in an English Maplin magazine in 1983, this circuit has an RIAA equalization. We suggest its...
We found this circuit in a 1991s PE Hobbyst Handbook. The circuit fires 10 LEDs that can control...
This alarm with NO and NC sensors was found in the January 1975 Radio Electronics magazine. The...