Zapper for a FET timer for Brushed 6/7mm Pager Motors
Ian Middlemiss produced his "zapper" in 2010 as part of his
very simple FET timer for brushed 6/7mm pager motors."
I'm not sure that low cost "circuit board" voltmeters were
easily available in 2010 but Chris Grant made use of one in 2018 for his
zapper. Chris said "I used a meter that I had which has a current readout which
is not used. Small voltmeters can be obtained for about £3 online. I also
used 2 switches (1 for the zapper and 1 for the meter) but both can be powered
from one switch as shown on the circuit diagram."
A rather less neat version from Tony Beckett, it does have a
stop watch and a "storage area" for Bluetac, whilst the front edges are metal
lined so that the timer can be shorted out and so stop a motor run early if