LED Flasher Unijunction (CB22144E)

The frequency of this circuit depends on the capacitor. The unijunction transistor can be the 2N2646.

Lamp (CB911E)
This circuit produces fast light pulses in na incandescent lamp. Pulse rate is adjusted by P1. The...
PFM Optical Transmitter (CB15960E)
In the figure we have the circuit of a pulse transmitter modulated in frequency (PFM) in the range...
Tube Filament Voltage Stabilizer (CB13359E)
In the figure we show how to obtain a stabilized voltage for the filament of a 6.3 V x 100 mA...