Adder with the 741 (CB25794E)

More inputs can be added to this adder that we found in the January 1995 Electronics Now magazine. Other operational ones can be used.

| Clique na imagem para ampliar |

Projector control (CB8299E)
This old slide projector control circuit was found in an 80s Hands On. The circuit uses modern...
SUS Frequency Divider (CB19903E)
In the figure we have a circuit that uses unusual components, being indicated for low frequency...
Rain alarm (CB6955E)
The sensor of this circuit found in Popular Electronics can be formed by a piece of fabric between two...