Garage Timer (CB21432E)

Found in General Electric and 1967 documentation, this circuit automatically turns off the lighting in a garage after the time set in R1.

| Clique na imagem para ampliar |

Low Impedance Preamplifier (CB13209E)
The integrated circuit can be replaced by more modern operational amplifiers like the 741. The...
Second order high pass filter (CB7522E)
Using a 741 op amp with symmetrical source, this circuit was found in a 1982 documentation. The...
50W Amplifier (CB23930E)
50 This transistorized guitar amplifier was featured in the November 1968 issue of Radio...