When I started making arcade machines I had the fantasy
that it would encourage other people to make their own. I deliberately
tried to make the early ones look home made. Sadly hardly anyone else did
try making one so I gave up the idea and my machines have since become
better finished and more complicated. Today, people seem amazed that its
possible to have all the skills required – woodwork, sheet metal and
machining, plastic forming, sculpting, graphics, electrics and software.
In the past many people were multiskilled and it was not seen as unusual.
Anyway, I was pleased to revisit the school mistress,
realising that this is a relatively simple idea that is not too hard to copy.
(My original uses a mains motor and PIR switch, but it will work with low
voltage components instead).
Geared motor, 40 -100rpm, with a a strong shaft
5-6mm diameter, from Ebay
12volt PIR switch from Ebay
2 roller microswitches
12 volt changeover relay
12volt, 1 amp power supply
4 x 3mm bolts and nuts to fix motor
20mm diameter x 300mm long dowel to support head
The hardest part is the mounting plate for the motor and microswitches
and also the disk that switches them on and off. For a school project, the disk
and mounting plate can be cut out of acrylic with a laser cutter. For a
home project the parts could be cut out of plywood.