Remote control tester (CB7823E)

This circuit from a 90s Electronics Now, uses a 4010 gate as a signal amplifier. The circuit triggers an indicator LED.

18V x 5A Step-Down DC/DC Converter (CB23589E)
This circuit consists of a Step-Down converter (voltage reducer) that can provide a 5 A output with...
Burst Generator (CB19528E)
The frequencies and intervals of the signals generated by this circuit are determined by the...
Stereo indicator MC1310 (CB22122E)
In the figure we show how to add an indicator LED to an MC1310 stereo decoder. The circuit is from...