NAND Astable Multivibrator Circuit with Adjustable Frequency

The circuit can be explained like this. Let us say output is 0 (pin 3) to start with. Hence output at pin no. 6 (the other NAND gate) will h...

Tuned Radio Frequency TRF Receiver

Tuned Radio Frequency (TRF) Receiver Circuit diagram. Super heterodyne receivers have been mass-produced since around 1924, but for reasons...