Car alarm (CB23933E)

We found this circuit in Radio Electronics from October 1968. The circuit drives headlight bulbs and can be adapted for current applications.

| Clique na imagem para ampliar |

555 Code Practice Oscillator (CB25530E)
This circuit was found in the November 1992 issue of Radio Electronics magazine. It uses...
XTAL Astable Multivibrator (CB12000E)
This multivibrator has its frequency controlled by a crystal. Other frequencies can be generated by...
High Input Resistance Amplifier (CB19902E)
We found this preamplifier circuit with high input resistance, on the order of 30 M ohms, in an...