This is the version of the previous circuit for vehicles with positive ground. The circuit is from a Radio Electronics from December 1976. A siren is included.
The NCX2220 circuit from NXP consists of a voltage comparator with low supply voltage and can...
This 3-decade operating range VCO was found in a 90s Popular Electronics. The circuit uses...
This circuit controls a fan in the car, according to the temperature, activating it automatically when the...