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FAQs / Re: Motor drive pulses
« on: January 23, 2014, 12:53:48 PM »
Ended up modifying the original old Minitech controller by adding a small circuit board with 3 monostable pulse generators to lengthen the 40 micro-second motor pulses to 4 milli seconds. Used a conventional circuit configuration with 555 IC timer ICs. Worked just fine. All parts are available at Radio Shack, or your favorite supplier.
The original circuit board seems to be the same as made by Minitech, but I have no original diagrams to go by. However, I have made a drawing of the whole controller, including the added monstables. If you would like a copy, email me at AG4ZA@ARRL.net for an electronic copy.
The original circuit board seems to be the same as made by Minitech, but I have no original diagrams to go by. However, I have made a drawing of the whole controller, including the added monstables. If you would like a copy, email me at AG4ZA@ARRL.net for an electronic copy.