This receiver uses old transistors that are equivalent to BC548 and BC558. The photo diode is of any type. The receiver can be used on a highly sensitive audio link.
This circuit makes use of an uncommon integrated circuit. It can provide a power of 6 W when...
Found on Popular Electronics from the 1990s, this oscillator uses a general purpose transistor. The...
This circuit operates at a frequency of 80 KHz and modulation up to 60 kHz. The circuit is from...