Reminder (CB9548E)

This circuit maintains on a flashing LED at a frequency determined by the capacitor. The unijunction transistor can be 2N2646.

| Clique na imagem para ampliar |

Telephone dialer (CB21268E)
This circuit was found in Electronics Now. With it the dialing signals of a telephone are...
Noise Generator with the 741 (CB12176E)
This traditional configuration of a white noise generator that uses the junction of a transistor with a...
1 Hz clock (CB17060E)
This circuit generates an accurate 1 Hz signal controlled by a crystal. The circuit is from 1995...