Antenna Amplifier (CB26118E)

This circuit for analog VHF televisions was found in the 1989 Radio Electronics Experimenter magazine. It also works for FM receivers.

| Clique na imagem para ampliar |

High voltage source for Geiger counter (CB8478E)
Found in a 90s Popular Electronics, this circuit generates high voltage for radiation detecting...
Light Alarm (CB24237E)
In this circuit found in the December 1972 Radio Electronics magazine. R can be from 1k to 22k,...
555 with duty cycle (CB24905E)
This circuit allows you to vary the duty cycle without changing the frequency. An interesting...