mm-rec.htm; updated: 01 January 2007


MicroMag Receiver

Not Available anymore

The mMag Receiver, here with the ESC, is small 16 x 18 x 4 mm3 and light, 1.8 gram.

A 3 Channel FM Receiver with SMD micro crystal and integrated electronics for the truly proportional control of two magnet actuators. All electronics integrated on one tiny PC board weighting not more than 1.8 grams including antenna. With the only 250 mm. long antenna it still has a range of far more than 100 meter when used with any normal FM transmitter. More than enough for the small models for which it is intended. The electronics work down to 2.2 Volt, so two NiCd, NiMH cells or one Lithium cell is enough. For use with electric propulsion a minmum of 3 cells is recommended, see Speedcontroller.

The receiver bandwidth is not quite as narrow as that of a standard receiver, so the operation in a 20 kHz grid is recommended.


The receiver has a microprocessor that automatically detects the motor channel and the neutral stick positions during the first second of start-up. This allows the use of any brand of standard FM model control transmitter without any adjustments. On these functions patents are pending. Switch on the transmitter with the throttle closed then switch on the receiver. It is important that low throttle yields a short pulse time as required by all ESC’s to get a fail safe when the transmitter signal drops out.

When the receiver/motor battery is plugged this should be done without hesitation. When not the microprocessor can hang in its boot phase. When the system does not start-up properly: simply remove the battery wait for 5 seconds and plug-in again.


The receiver has one output that can accept the mSpeedcontroller that has been developed in conjunction with this receiver. A standard speedcontroller can not be used with this receiver as the output also contains the neutral information and is thus not compatible with standard speedcontrollers or servo’s.

Copyright © 1999 Ruijsink Dynamic Engineering. All trademarks shown are trademarks of their respective owners. All rights reserved., designed by Rick Ruijsink