Red alert (CB9082E)

This is another of the Star Trek red alert circuit that you can find on this site. We took this version from an English publication from the 80s.

| Clique na imagem para ampliar |

Remote control receiver (CB21914E)
The frequency depends on the coil and is not found in the original documentation but should be...
Digital Do Nothing (CB26218E)
This is a device for those who need to show that they know how to use digital electronics but have...
Sinusoidal generator CA3130 (CB21987E)
Using an operational amplifier with FET, this circuit from a 1977 publication can generate...