Found in American documentation from the 90s, this circuit triggers a buzzer with a Sonalert-type oscillator when the temperature of the sensor reaches a certain value set in R2.
This simple timer based on unijunction and SCR transistors is from 1995 documentation. The maximum...
A non-sinusoidal 120 V voltage can be obtained with this circuit found in the December 1992 Radio...
This circuit uses an LM339 and was found in the July 1995 Electronics Now magazine. The LED lights...