This interesting transistor circuit has several effects and an included amplifier. The circuit is monophonic and powered by standard batteries. The number of keys can be changed.
This 3-digit code switch was obtained from an old American documentation. The capacitor is 470 uF...
This antenna or booster amplifier operates with signals from the midband (MW) range up to the VHF...
The circuit presented here shows how two flip-flops of a 4027 can be connected to perform a...