Bicycle speedometer (CB7382E)

This circuit appears in other versions on this site. obtained from other publications. This is from American documentation from the 90s.

| Clique na imagem para ampliar |

Voltage Controlled Function Generator (CB18882E)
This circuit uses unusual operational amplifiers, but equivalents can be tried. FETs can also be...
Inverter with the CA3140 and Reinforced Output (CB12308E)
This circuit was obtained in a 1991 publication. What it does is to amplify a signal with unit...
Coilless MW Digital Transmitter (CB19048E)
This small digital transmitter uses a 1 MHz crystal, or another nearby frequency, to produce a...