This circuit was found in 1980s Radio Electronics. The circuit includes the power supply. The ICL8038 circuit was very common at the time in this type of application.
This circuit is designed to activate an automotive alarm after 8 minutes of activation. Of course...
This 200 kHz oscillator was found on a 90's EDN. It consumes only 2.8 mW and has CMOS compatible...
This circuit was found in the October 1989 issue of Radio Electronics magazine. It drives an...