mm-esc.htm; updated: 01 January 2007


MicroMag Electronic Speedcontroller

MicroMag is not available anymore

The mMag ESC, here with the Receiver, is small 10 x 10 x 4 mm3 and light, 0.5 gram.

The tiny 1.5 Amp Electronic Speed Controller (ESC) is not integrated on the PC-board of the receiver. The speedcontroller is best placed close to the motor, this reduces cable length and chances of HF interference.

The high operating frequency of the ESC yields smooth control characteristics and high motor efficiency. The 然ag ESC can safely handle the 1.5 Amp. More than this is not required for a micro model. The force of the actuators will not allow higher powered models unless they fall in the Radio Assist Free Flight catagory. When someting special is required mail us at maybe we can help you.

The radio will operate on 2.2 to 4.8 volts. Because 1.1 volts per cell (NiCd/NiMH) is reached quickly on motor power, operation on 3 or 4 NiCd or NiMH cells, or one 3.0 or 3.6 Volt Lithium cell is recommended.
With a trick 2 cells for the motor can be used together with one additional alkaline to beef-up the radio voltage. This is not recommended for your first microflight experiences. For the more proficient modellers the procedure is described in

The speedcontroller is specifically designed for the MicroMag system. It will operate at low voltage, has a special decoupling to allow the NoDrop BEC. The automatic detection of the closed throttle stick position is built in the receiver microprocessor. All this means this 然ag ESC can only be used with the 然ag Receiver and the 然ag Receiver can only be operated with this speed controller (or without speedcontroller in a CO2 model or glider).

ESC is Electronic Speed Controller.

BEC is the term for Battery Eliminator Circuit and means the receiver/servo's run on the same battery as the electric propulsion motor. normally with conventional sets the motor battery needs to count 6 cells minimum to generate a stable 5 volts for the radio.

No Drop means that the receiver voltage is equal to the battery voltage. This is only reliable with the MicroMag system! Normal good BEC's feature a Low Drop circuit, dropping a minimum of about 0.3 volts. Simpler ones drop even 1.2 volts minimum.

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