Clock alarm timer (CB21290E)

Found in Popular Electronics from the 90's, this circuit uses common components and can be easily implemented.

| Clique na imagem para ampliar |

800 Hz Sinusoidal Oscillator (CB13572E)
This circuit is from an old publication from 1977 and can be implemented with more modern...
Gain 100 buffer (CB9558E)
This basic buffer circuit can be implemented with other operational amplifiers. The circuit is...
5V x 3A Regulator (CB5468E)
This circuit can be applied to other 3-terminal regulators and equivalent transistors can be used....