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« on: January 04, 2009, 04:28:32 PM »
Sage, Hood,
Thank you for your previous advice, the 4K7 resistors gives a max 2.89 v Hi at the pin and .2v Low, and the unit works OK. but after checking the Hi / low volts as suggested, I tried using a transistor to replace the resistor. I used a CBC327 (TO-92h) semi-conductor, (sorry I really dont what the correct terrms are), connected the emmitter(E pin) to the 5v and the Common(C pin) to the board 13 /15 pins, the A & B MPG signal wires connected to the central (B pin). When I checked the Hi / Low volts I got 4.84v hi and .21v low at the board.
The MPG works the machine so I think this appears to be an answer to finding the correct resistor to raise the Hi v to over 3v.
Please advise me if you can see any problems with this set up.
rogerbsstt