Extended Band Oscillator (T1670E)

This bench circuit was found in Radio Electronics magazine from December 1957. The circuit generates signals in bands that depend on the coils.

| Clique na imagem para ampliar |

SCR and LDR Light Alarm (CB16416E)
This circuit triggers a relay when a pulse of light hits the LDR. The potentiometer serves as a...
NOR Gate with Operational (CB19837E)
In the figure we have the way to implement a NO OR or NOR gate with an operational amplifier. The...
Fluorescent Lamps Test (CB18603E)
The presented circuit is used to test ordinary fluorescent lamps. This circuit also has a mains...