This is a mains 230V AC voltage indicator and is a LIVE
CIRCUIT, so take care. The Resistor has to be a fusible
ceramic wire wound and the capacitor 630V AC or higher
Earthing Prevents Shocks
This circuit has been drawn from my memory and i have not tried it out again, just see if it is ok and then try. You should use the fuse of 100mA a slow blow if you want but it is very important. This circuit has to be enclosed in a fire retardant plastic sealed enclosure to avoid contact.
People learning Electricity and Magnetism or
Hobby Electronics, should start with battery circuits. Use DC
Power Supplies to power your projects in the second stage.
Mains powered experiments needs qualified supervision of an
Capacitor Powered Industrial Timers were first
designed by me around late 80s. These proved a bit expensive
to manufacture but were smaller in size. There was no heating
of any parts. SSR or high impedance relays were used as
20th May 2020
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