Simple Mini FM Receiver Schematic



Simple Mini FM Receiver Schematic

This schematic shows mini fm radio receiver with good performances and works great even if the sensitivity is not too high.

Wideband RF Preamplifier



Wideband RF Preamplifier

This circuit can be made in two ways: 

(1) with a non-linear element operating with negative feed-back. 

Stepper motor controller

motor-driver-circuit

Stepper Motor controller

The circuit is very simple and inexpensive. This is good thing because most commercial stepper motor controller ICs are quite expensive.