SCR trigger (CB21461E)

This simple SCR trigger was found in a 1965 General Electric SCR manual. The circuit makes use of a diac, and the transistor supports an equivalent.

| Clique na imagem para ampliar |

Tuned Ultrasonic Receiver (CB24920E)
In the figure we have a way of receiving ultrasonic signals of a single frequency using a PLL 567....
Comparator (CB5090E)
The HA2620 integrated circuit used in this comparator is from the 80's, but the setting can be...
Electronic Shot (CB15939E)
The UM3562 integrated circuit (not very easy to find) synthesizes three types of sound that...