This circuit was found in the December 1982 Radio Electronics magazine. The components are of types that are still commonly found. The power supply is not included.
In the figure we have the way to obtain a monostable TTL based on 74121. The circuit appears in...
With good filtration, a battery charger can be used as a power source. The filter shock can be the...
This oscillator has an output power of 20 mW. We found it in a Mullard transistor manual from...