JimDaldry.com

This is the final schematic, for the controller. Items from the left edge to the middle are in the control box, and those to the right are in the tuner unit in the other room.The 6 upper-most switches on the left are used to move the capacitors and the roller inductor, with position feedback showing on the ohmmeter.The 2 LED's at the top center are used to set the mid and high voltages, approximately 2 and 4 volts. The resistor below the LED's sets the motor direction line to mid voltage. The LED's connected to the relay 1 and 2 switches indicate when the relays are live, and are powered "for free" by base current from the relay driver transistors.The 3 variable resistors on the right are each attached to a tuning device, and they are connected to the ohmmeter through FET's that are switched by the motor logic signals.The ohmmeter is a DVM that is sold at Harbor Freight that, a couple times a year, sells for about $2.00 US. A typical panel meter sells for ten times that. I have 3 more of them just waiting to go into projects.

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