This timing circuit was found in old documentation. The technology is CMOS. The supply can be made with voltages from 3 to 12 V. The time depends on R1 and C1.
This circuit that generates a special sound was found in a Popular Electronics from the 90s. The...
This bridge amplifier (BTL) is from the SGS linear integrated circuit manual. The circuit is...
In the figure we have a simple way to produce tone in a piezoelectric transducer. The frequency depends...