The original application of this 1967 Ferranti circuit can be changed so that it functions as a pass sensor shield for gears and other moving objects.
Suggested by Motorola documentation from the 1980s, this circuit uses power transistors from the...
This 27mW transmitter was found in documentation from the 60's. The transistor is germanium of the...
This CMOS oscillator circuit generates signals up to a few megahertz, depending on the capacitor value....