Okay I have now finally gotten into the sync/speed circuitry side of things
. Harry has kindly been helping me with valuable info in constructing a sync circuit involving an encoder disc and an opto-fork circuit type arrangement involving an IR LED and phototransistor.
I've constructed his circuit and have tested it out with the encoder disc and it works like a charm as I get pulses on the oscilloscope when passing it over the opto fork, the white strips on the disc will reflect IR light and the black strips will absorb the IR light, hence pulse on, pulse off!
I then stuck the encoder disc to the Nipkow record disc and rigged up the sync circuit to test it out while the Nipkow disc is spinning and it works very nicely and I'm getting a nice consistent set of pulses which can be seen in one of the pictures below
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Now that I've perfected the sync circuit I have been pondering on a suitable speed control circuit for my 2Kyosho RC car motor that needs 2.67A to drive it and it didn't take me long to find a feasible circuit to try which is the motor speed control portion of this circuit
http://www.nbtv.wyenet.co.uk/speedctrlckt.gif . So I made only the motor portion of the circuit on my breadboard for testing and voila it works great!!!
So I now have a suitable speed control circuit for my high powered RC car motor.
Just got message from Harry that there is another stage to the sync circuitry I need to still construct which is the monostable with filter, so will be working on that next.
Anyways here's my latest construction pictures: