Found in an Electronic Design from the 90's, this circuit uses common components. The circuit is calibrated at 50º C.
This circuit was obtained in a 1964 magazine, but it can be easily assembled today, as the...
The A3906 integrated circuit from Allegro Microsystems (www.allegromicro.com) consists of a PWM...
Found in a Popular Electronics from the 90s, this circuit can be used as an electrifier. T1 can be...