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Introduction

The DMR-203 may be used with Pro-150 controllers. There are two ways of doing this. One involves a slight modification if the DMR but has simpler wiring. The second does not involve modifying the DMR, but has slightly more complicated wiring.

This page describes the first method - modifying the DMR.

The alternative wiring is shown elsewhere.

To use with the standard wiring as shown in the DMR instructions for use with VTX or Pro-120 controllers, the DMR needs a small modification: the 5v regulator in the DMR must be removed so it will operate from the 5v supplied by the controller to the pot top.

DMR modification

This modification is easily done by anyone competent with a soldering iron. The regulator is identified in the drawing below, left. Remove it and link the outer two pins as indicated, right, with a piece of copper wire.

Notes

Programming. The Pro-150 will need to be reprogrammed suitably. Although the default program works, its unlikely to be what you need and the DMR will not give full speed with the default programming.

Failsafes. If the DMR goes into Failsafe mode, it causes the Pro-150 relays to chatter.

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