This traditional signal injector configuration was obtained in a 1977 amateur radio manual. The frequency is given by the capacitors and the supply can be made with 1.5 or 3 V.
Using three gates of t4011 this oscillator produces a rectangular signal with frequency given by...
This small voltage regulator was found in a 1969 EEE. More powerful transistors can be used to...
This classic windscreen wiper interval setup was found in American documentation from the 90s. The...