CH-1092 Belmont, Switzerland
Tel +41 21 728-6156, Fax 728-6157
Email info@didel.com, www.didel.com
File www.didel.com/slow/mirted/Mir.doc
MIR and TED – The solution for 10 grams ULS
This document was posted in March 2003. We progressed a lot since then, and we
have a new MIR family, documentation in French for the moment (with many pictures).
See www.didel.com/Ir/Mir.pdf for the new documentation
MIR is a family of ultralight (0.6g) low power multichannel ESC (electronic speed control) circuits that
decodes IR signals and are optimized for the single-cell Li-Poly accumulators. They are controlled by
a TED3 or TED4 handle ot TedRa adapter to your radio (see www.didel.com/slow/tedmir/TED.doc).
The infrared receiver circuit adds a weight of 0.38g (0.28g after sanding down). MIR is a 1 gram
complete IR solution.
MIR receivers are provided with the DIDEL ultralight connectors. The IR receiver can be sanded down
from 0.47g to 0.25g and less. Weight with connectors and wires goes up to 1.3grams. For more
information, see www.didel.com/slow/wiring/Plugs.doc
MIR3 MIR5 3 channels, MIR4 MIR6 4 channels
TED3 3 channels
MIR3 (0.60g) can control one propeller motor (up to 1 Amp) and two BIRD circuits (min 70 Ohm).
MIR3 is optimized for ultralight slow flyers.
MIR4 (0.61g) can control one propeller motor (up to 1 Amp) and three BIRD circuits (min 100
Ohm). MIR4 is optimized for less than 10 grams aerobatic flyers.
Mir3 and Mir4 are low cost due to avoiding additional components besides the processor. Several
processor outputs are bridged to drive Birda down to 70 Ohm resistance with a correct efficiency.
See www.didel.com/slow/mirted/Mir4.doc for the output resistance analysis and other specifications
of MIR3 and MIR4.
MIR5 (0.62g) can control one or two propeller motors (up to 0.5 Amp each) and two BIRD circuits (min
10 Ohm). It can also control three Birds or bidirectionnal propeller motors (min 10 Ohms or 0.5Amp).
MIR5 can be used on larger slowflyers and on miniature three propellers blimps.
MIR5 exists in three varaints: MIR5, MIR5a, MIR5b.
Channels 1 and 2 control a bidirectionnal bridge, and the software will send +/- 100% of PWM to a
connected magnetic actuator (BIRD).
Channel 4 controls a third bidirectionnal bridge in the case of MIR5. Channel 3 (thrust) is available as
a servo output, and a ESC circuit must power the motor propeller. MIR6 includes an additional power
transistor (16 PWM levels) for the prop motor.
On MIR5a and MIR5b, the third bridge has separate control for its two halves, and it can be used to
control two motors with 16 PWM levels each. Since it is a bridge, and not simple N-FET in open
collector mode, it is not possible to use a higher voltage for the motor.
MIR6 (0.62g) can control one propeller motor (up to Amp) and three BIRD circuits (min 10 Ohm). MIR6
can be used on larger aerobatic.
See www.didel.com/slow/mirted/Mir5.doc for more detailed specifications
TED one-hand IR transmitters
Controlling a slow flyers with one hand gives the pilot
more freedom to catch the plane when required, and
stay in equilibrium when moving through the home,
following the plane.
TED3 handle weights 100 grams and fits comfortably in
the palm of the hand. It consists of a joystick for pitch
and yaw control, and a lever for the throttle. In a large
room, the LED array must point the plane or the ground
in front of the plane. Direct maximum distance is 6 to 10
meters. At home, reflexions allows to point almost
anywhere.
A 9-V battery provides hours of operation. Ted software
tests the battery at power up: 5 bips for a good battery,
one bip if only 8 Volts left, and TED will do a siren noise
until the battery is completely exhausted. TED has two
modes of operation. The normal mode is for the usual
control of a rudder and elevator. The Led is blinking fast
in this mode (2 Hz).
When the joystick is depressed at power-up, the LED
blinks slowly and the yaw (com0) and pitch (com1) are
mixed to control the two ailerons of a V-Tail.
TED4 has an additional knob in front for roll control. That
return-to-zero knob is controlled by the other hand when
required.
TedRa
TedRa is the naked PC board of the TED3 handle, directly
connected to any radio. The controller decodes the PPM signal of
the transmitter before radio frequency modulation.
Interfacing is easy if the radio has a training connector. See
documentation on
http://www.didel.com/slow/mirted/TedRa.doc.
MIR Power 3-5V 4 mA
Weight 0.6g plus 0.3g IR circuit
MIR3
90 CHF
MIR4
90 CHF
MIR5
112 CHF
MIR6
120 CHF
Pricelist
TED Power 9V 40 mA
Weight 50g plus 9V battery
~ 60 USD
TED3
220 CHF
TED4
250 CHF
~ 60 USD
TedRa
60 CHF
~ 75USD
~ 80USD
~ 150 USD
~ 170 USD
~ 40 USD
JDN 030303/091129