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.
This simple CMOS touch switch was obtained in a 1987 publication. All components are common and the...
We found this transistor circuit in a 1967 General Electric documentation. The circuit makes use of...
Following the American FCC rules, this 90s Radio Electronics circuit shows how to use a...