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 circuit was found in a 1980s American documentation. Operational amplifiers are from that...
Pressing S1 by a moment L1 glows up, remaining by a time interval depending on C1. This time...
This circuit causes a bicolor LED or two LEDs of different colors to alternately flash at a...