Using the NE5205 integrated circuit this circuit was found in the May 1987 issue of Radio Electronics magazine. It can amplify signals up to 450MHz.
This is the normal configuration for the TDA2003 integrated circuit, an amplifier that can provide 10...
Found in an English publication from 1977, this circuit uses only 1 LED. Unlit means heads and lit...
In the figure we have the transmitter and the receiver for an optical audio link via infrared. The...