Optical sensor... blasted EMI :(

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i have optical interrupter triggering interrupt on arduino part of miniature rolling road slotcars. interruptor triggered in turn small dc motor turning on via wheels of slotcar. code works great. in fact worked great until...

i put more powerful cars onto , road speed jumped 10 fold other cars. not cars super performance i'm sorry emi coming these motors generating spurious signals. i've knocked circuit down single piece of wire, i've put scope on wire, i've wrapped wiring tin foil, i've put brass plate , lead plate between motor , wiring , still getting these pesky blips on signal. if move motor 6 inches away settles down.

but can't move sensor further motor :(. stuck. hope there sort of electronic cleverness can setup. please.


cheers alan

have tried putting capacitors across terminals of motors on cars.


Arduino Forum > Using Arduino > Sensors > Optical sensor... blasted EMI :(


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