In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Johnson Rod wrote:

your coils could be producing a flyback voltage. try placing a diode across the dc coils; anode to negative, cathode to positive.

also your coils could be producing an emf. if the flyback diode does not suffice, try placing the control circuitry farther from the coils and/or in a grounded metal enclosure.


its good to be back...
nickB

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