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.

Mini Animatronic (CB20429E)
This circuit was originally designed to drive an engine with a small flower that dances when the...
Amplifier for tunnel diode (CB23848E)
In the figure we have an RF amplifier for tunnel diode. The frequency range will depend on the...
Middle Control (CB955E)
Using two common operationals, such as 741, this circuit serves as a medium control in an...