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 |

DC Motor Control (CB12292E)
This circuit is from 1977 documentation, but can be assembled with BC548 for Q1, Q2 and Q4, BC558...
FET caracteristic curve plotter (CB20730E)
Found in American documentation from the 90s, this circuit uses components that are still common...
Piezoelectric Mike Preamplifier (CB786E)
This high impedance input amplifier is suitable for the use with piezoelectric sources such as...