144 MHz Frequency Doubler (CB4675E)

This circuit is from an old American amateur radio manual. The circuit shows how to use a Varicap on a high power frequency doubler circuit.

| Clique na imagem para ampliar |

Receiver for Heart Rate Monitor (CB25407E)
This is the receiver for the previous circuit found in the November 1991 Radio Electronics...
Proximity Sensor 1 (CB5036E)
This interesting circuit was obtained from a Poptronics of February 2001. The American magazine no...
Controlled Voltage Regulator (CB1333E)
With this circuit a logic output signal from a microcontroller or other digital TTL configuration can...