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Operating instructions
Version 02/09
Carbon Series Speed Control "Micro"
Item no. 20 73 69
Intended use
The product is connected to the radio controlled receiver of a model vehicle and serves as a continuous
RPM control of an electric motor of model vehicles.
This product complies with the applicable national and European specifications. Any company or product
names are trademarks of their respective owners. All rights reserved.
Scope of delivery
• Speed control
• Operating instructions
Safety instructions
The guarantee will be void if damage is incurred resulting from non-compliance with
these operating instructions! We assume no liability for any consequential damage!
We do not assume liability for personal injury or material damage resulting from
improper use or disregarding the safety instructions! In such cases the warranty/
guarantee is voided.
• The unauthorized conversion and/or modification of the product is inadmissible for safety and approval
reasons (CE). Never cut off the cable/plug from the cruise control, this will void the warranty/guarantee.
• The product is not a toy and must be kept out of the reach of children!
• The speed control must not become damp or wet.
• Do not short-circuit the connecting cables, as this would destroy the speed control. The same applies
to overload (e.g. when using an unsuitable motor) or when the polarity is not correct. Never connect a
Schottky diode to the motor. Only use an electric motor with interference suppression. Connect only one
electric motor to the speed control.
• Disconnect the battery from the speed control when the speed control is not needed. The speed control
can be temporarily switched off using the on/off switch.
• Always turn on the transmitter first before connecting the speed control with the battery and switching
it on!
• Before turning off the transmitter, turn off the speed control and, if necessary, disconnect it from the
battery.
• The speed control is designed for NiMH/NiCd batteries (6-7 cells).
It can also be used with 2-cell LiPo rechargeable battery packs, however in this case there is
no undervoltage safety shutdown. If a LiPo battery pack is used with the speed control, the LiPo
battery pack will be damaged if totally discharged!
• The heat sink becomes very hot during operation, risk of burns!
• Handle the product with care. It can be damaged through impact, blows or when dropped even from a
low height.
• Do not leave the packaging material lying around carelessly, as it can become a dangerous toy for
children.
Installation
Install the speed control with double-sided tape (or with a Velcro strip) as far away from the receiver as
possible. The engine power cable, the battery cable and the thin control cables must be installed as far
away from the aerial cable as possible (the aerial cable should run directly from the receiver to the aerial
holder). Otherwise the model can show malfunctions or the radio range might be reduced.
Make sure sufficient cooling is provided for the speed control!
The cables must not get into moving parts, secure them with cable ties. The cooling fins must not be
covered.
Connection
• Connect the green plug to the motor. If necessary, install a suitable socket on the motor. Should the
rotational direction of the engine not be correct, swap the two motor cables or set the servo reverse
function correctly on the remote control.
To not swap the cables connected to the battery - this will destroy the speed control. Warranty/
guarantee void!
• Connect the three-pole plug to your receiver. Make sure the assignment on the receiver is correct (see
operating instructions of the receiver as well as the information on the receiver).
Yellow/white/orange cable:
Control signal
Red cable:
Operating voltage
Brown/black cable:
Earth
• As the speed control is equipped with a BEC, no receiver battery or rechargeable battery may be used!
The receiver is powered by the vehicle battery directly through the speed control.
• Install the on-off switch of the speed control in the vehicle. Put the switch in the "OFF" position.
All manuals and user guides at all-guides.com
• Turn on your transmitter. (Check battery state!) Put the trim control in centre position. Put the throttle in
• The switch on the speed control must be set to the "OFF" position.
• Insert the battery pack in the vehicle and connect it to the speed control.
• Let go of the throttle or put it in neutral position. Put the acceleration/brake trim control in centre position.
• Switch on the speed control (put switch in the "ON" position).
• The motor responds with a confirmation tone and the two LEDs on the speed control flash quickly
• The speed control is now ready for operation, you can steer the vehicle using the remote control.
• The LED lights up green in neutral position. It flashes quickly when driving forward and slowly when
• First switch off the speed control (put switch in the "OFF" position).
• Disconnect the battery from the speed control.
• Turn off the transmitter.
Number of NiCd/NiMH cells: .... 6 or 7 (7.2V / 8.4V)
Number of LiPo cells: ............... 2 (7.4V), but there is no integrated LiPo low voltage protection!
BEC: .......................................... 5V=, 1A
Constant current: ...................... 5 minutes/25A, 30 seconds/35A, 1 second/54A
Motor type: ................................ 380
Motor limit: ................................. 20T
Clock signal: .............................. 1kHz
Battery connection: ................... Microcar (red plug)
Receiver connection: ................ JR
Functions: .................................. Proportional forward, break, proportional reverse
Weight: ...................................... Approx. 19g (with cables and heat sink)
Dimensions (L x W x H) ............ Approx. 29 x 27 x 20mm (with heat sink)
Overheating protection: ............ > +93°C
Operating the vehicle
neutral position.
Caution!
Place the model car so that the drive wheels do not touch the ground or any objects. Do not
touch the drive mechanism and do not block it! Risk of injury!
Do not move the throttle.
(approx. 2 seconds). Then motor plays another confirmation tone "DO-RE-MI" and neutral position is
saved. The greed LED on the speed control is lit permanently (the red LED is off).
Please note:
When changing between forward and reverse drive, the throttle must be put in neutral position
for a short time.
If the throttle lever is moved directly from forward to reverse drive, the brake of the speed
control is activated (vehicle does NOT reverse!)
Should the vehicle respond exactly opposite to your input, swap the two motor cables or set the servo
reverse function correctly on the remote control.
reversing. If the LED is lit red permanently when driving forward, the end position has been reached (full
throttle).
If the transmitter signal is lost, the speed control turns off the motor for safety reasons (the
steering servo will vibrate, however, if no failsafe is installed).
If the speed control overheats, the motor will be turned off as well. In this case, check the drive
transmission or the motor type.
End of operation
Disposal
Please dispose of the unserviceable device according to the current statutory requirements.
Specifications
These operating instructions are a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1,
D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming,
or the capture in electronic data processing systems require the prior written approval by the editor.
Reprinting, also in part, is prohibited.
These operating instructions represent the technical status at the time of printing. Changes in
technology and equipment reserved.
© Copyright 2009 by Conrad Electronic SE.
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