10 A NC Relay Shield (CB6015E)

This 10 A solid state relay was found in a 1980s documentation. It can work as a shield and implemented with modern equivalent transistors.

| Clique na imagem para ampliar |

Transistor Tester (CB1409E )
The indicator instrument of this transistor tester, from an Argentine publication of the 1970s,...
Electronic Ring Bell using an UJT (CB439)
This circuit uses two oscillators to produce a sound that seems the sound of a ring-bell. The...
Compact Multimeter (CB3871E)
The accuracy of this multimeter depends on the accuracy of the used resistors. The circuit uses a...