This circuit with three transistors was suggested in a Radio Electronics magazine from February 1963. The transistors are types of the time. Power comes from a 12 V battery.
This 555 timed touch switch was found in a 90s Hands-On Electronics. It triggers a buzzer, but a...
This RF amplifier step has a dynamic range of 140 dB and can amplify signals from 0.5 to 40 MHz....
From a 90s Popular Electronics, this circuit emits pulsating signals for different types of...