This circuit can be used to obtain a zener voltage from a common zener of another value, adjusting in a multimeter. The circuit is from an American documentation of the 1970s.
This circuit makes use of an old Texas Instruments component. The buzzer is also from the era. The...
The resistors R determine the frequencies of the oscillator together with C. The circuit is from a...
In this oscillator circuit using 3 TTL inverters we have all the conditions for the frequency...