This amplified metronome was found in a 90s Popular Electronics. The circuit is powered by a 9 V battery but will also work with 6 V of 4 standard batteries.
We found this circuit in an American documentation from the 90s. Through an LED it indicates the...
August 2016 - It can be purchased from Mouser Electronics the new digital isolators ADuM120N and...
In this circuit, from a documentation from the 70's, we have the way to control the active cycle of...