Found in a 90s Popular Electronics, this transistorized circuit generates pulses from 2 Hz to 50 kHz in three selectable ranges. The circuit has both AC and DC outputs.
The L1 coil is formed by 5 turns of 16 AWG wire in the form of 4 cm without core. Capacitors are...
Found in RCA documentation two years 70, this circuit triggers an incandescent lamp at dusk. The...
We found this circuit in a Popular Electronics of the 90s. Its purpose is to detect when it locks...