r/c buddy box plugs/ pin assignment - hobbyking · upgrade exampe 2 - graupner fm 314 a low priced,...

R/C buddy box plugs/ pin assignment

For running a R/C transmitter with the R/C Interface the transmitter has to be equipped with a buddy box, that makesthe PPM-Signal accessible from outside. Unfortunately, each manufacturer uses its own type of buddy box connector:

Multiplex Futaba Robbe Graupner/ JR

all

DIN female plug 5-pin 45°

(180°), mating faceGND: 3Signal: 4

short-circuit 3 with 5(1: Bat+, 2: Bat+, 5: NC)

(DIN female plug 7-pin:additional pins 6, 7 for

copying, 5-pin male plugalso fits the 7-pin female

plug)

appropriate male plug forfemale plug

Hitec

9ZAP/9ZHP, FF8/8UAP,FF7/7UAP, FC16, FC18,

FC28, ..

DIN female plug 6-pin 60°,mating face

GND: 0 = shieldingSignal: 4

short-circuit 3 with 5( 1: Bat+, 2: Signal in, 5:

Bat+, 6 : +5V )

3PJ, T3PJ, ..

female plug for 3.5 mm monojack

GND: 1Signal: 2

3.5 mm mono jack connector

FX15, FX18, ..

CM-Rex, Terra TopFMSS/PCMS, ..

DIN female plug 5-pin 45°

(180°), mating faceGND: 2Signal: 1

(3: Bat+, 4: Signal in, 5:Bat+)

Sanwa

RD8000, RD6000, VG400,VG600, Radiant, Vanguard

PPM, ..

FM 314, mc-10, mc-12, mc-14, mc-15, mc-16, mc-16/20,mc-18, mc-20, mc-22, mc-24,

FM4014, ..

European RF part and buddybox: JR Quattro, JR 9x, X-

347, X-387, X-388, X-756, X-3810, ..

female plug for 3.5 mm stereojack connector

Signal: 1GND: 2NC: 3

3.5 mm st. jack connector

all MX transmitters with DSCconnector: MX-12, MX-16,MX-22, mc-19 (with DSC-

connector only)

American RF part and buddybox: X-347, X-387, X-388, X-

756, X-3810, ..

female plug for 3.5 mm monojack

GND: 1Signal: 2

Page 2 of 7

Fokus 4, Eclipse 7, Flash

5, ..

DIN female plug 6-pin

60°, mating faceGND: 0 = shielding

Signal: 4short-circuit 3 with 5

( 1: Bat+, 2: Signal in, 5:Bat+, 6 : GND)

Jamara

Compa x4+1 Trainer

DIN female plug 6-pin

60°, mating faceGND: 0 = shielding

Signal: 4short-circuit 3 with 5

( 1: Bat+, 2: Signal in, 5:Bat+, 6 : GND)

transmitter of model"Calisto"

female plug for 2.5 mm monojack

GND: 1Signal: 2

2.5 mm mono jack connector

4C, 7C, 9C, FF 4, FF 7, FF 9,T6EXA, Skysport T4YF

female plug, square 6-pin,mating face

GND: 2Signal: 1

short-circuit 5 with 6(3: NC, 4: Signal in, 5: Bat in,

6: Bat+)

Walkera

WK-0701

4 pin female mini DIN plug,default colors of the cord

GND: 3

WK-701 PCM Signal: 2

Walkera 4-channel

DIN female plug 5-pin 45°(180°), mating face

GND: 2Signal: 3

(4: Bat+, 5: Signal in)

Stylus, M 11, ..

4 pin female mini DINplug (without blue

contacts)

GND: shieldingSignal: 7

1+2 trough for plastic pin

4 pin male mini DINconnector

M Zechs, ..

female plug for 3.5 mmstereo jack connector

Signal: 1GND: 2NC: 3

3.5 mm st. jack connector

Kyosho

Caliber M24 transmitter

3.5 mm mono jack connector

Micro 47G

4 pin female mini DIN plug(without blue contacts)

GND: shielding

Signal: 71+2 trough for plastic pin

4 pin male mini DINconnector

Spektrum 2.4 GHz

DX 7

female plug for 3.5 mm monojack

GND: 1Signal: 2

3.5 mm mono jack connector

Lexors

Nova 4, Nova 6

female plug for 3.5 mm stereojack connector

9/10/13 1:23 PM

4 pin female mini DINplug (without blue

contacts)

GND: 9Signal: 3

1+2 trough for plastic pin

4 pin male mini DINconnector

Awesome R/C Productby Model Engines

Transmitter E8 of model"Twister CP"

4 pin female mini DINplug, default colors of the

cord

GND: 5

PPM Signal: 1

E-Flite

Transmitter 6-channelCCPM E8 of model"Blade CP", Belt CP

4 pin female mini DINplug, default colors of the

cord

4 pin female mini DIN plug,default colors of the cord

GND: 3

short-circuit 3 with 4UART PCM Signal: 2

connect 2 with 1 temporarilyto activate the signal output

or

PPM-Signal: connector forcrystal oscillator with crystal

unpluggedGND: 3 or charging connector

Walkera 22 E (35, 36, 39)

4 pin female mini DIN plug,default colors of the cord

GND: 3PPM Signal: 2

Walkera transmitter of model"Dragonfly R7C"

female plug, square 6-pin,mating face

GND: 2Signal: 1

short-circuit 5 with 6(3: NC, 4: Signal in, 5: Bat

in, 6: Bat+)

jack connectorSignal: 2GND: 1NC: 3

3.5 mm st. jack connector

T2M

transmitter E-Fly

female plug for 3.5 mm monojack

GND: 1Signal: 2

3.5 mm mono jack connector

GND: 5

PPM Signal: 1

PPM-Signal: connector for

crystal oscillator with crystalunplugged

GND: other crystal pin orcharging connector

All female plugs viewed from mating face/ outside = view on solder side of the corresponding male plugs; blue bridgesare used for deactivation of the RF-part. The RF-part should be switched off in pupil/master mode because nodisturbing antenna is plugged into the transmitter and, therefore, the generated energy is not emitted, that can lead toheating and destruction of the RF-part.

Your transmitter is not equipped with a buddy box..

.. is not intented to be used in pupil/master mode, but it should be connected to the PC. That is possible anyway, if thetransmitter uses PPM. With following steps, one can find out this and can upgrade the transmitter:

Choose microphone as input for your sound card. Test the setting with a real microphone.

Solder 2 wires at a 3.5 mm stereo jack connector (to contact 1 and 3, see figure of Graupner connector).

Plug the cord into the soundcard, open the case of your transmitter and switch it on. Touch the ends of the cordwith contacts inside the transmitter. If you hear a buzzing noise that changes while moving the sticks, you havefound the signal. Commonly, GND is the negative pole of the battery and PPM signal one of the wires leadingfrom the main board to the RF part.

Drill a small hole in the R/C transmitter casing and attach e.g. a 3,5 mm female stereo jack plug at the casing andconnect it with GND and PPM signal.

Further information:

more detailed information about buddy boxes http://users.belgacom.net/TX2TX/tx2tx/english/tx2txgb1.htmfree oscilloscope program using sound card http://polly.phys.msu.su/~zeld/oscill.htmlExperiments with the PC sound card (German) publikationen

traced PPM-Signal of Graupner/JR mc22 visualized with Oscilloscope program

hints:

Upgrade your transmitter at your own risk.

Be careful while seeking the PPM-Signal in the activated R/C transmitter, cause no short-circuits.

The self-made buddy box may work well with the RC-Interface, but not in the pupil/ master operation withanother transmitter as master. Without further knowledge both transmitters can be damaged.

upgrade example 1 - Graupner mc 15

Since a buddy box is offered for mc15, upgrading should be no problem. The PPM-Siganal is detected fast:

A matching self-made buddy box looks like this, the prefabricated parts are easily to get from the direct mail selling or alocal electronics store:

The protection resistances are important if a short-circuit happens through a faulty plug.

upgrade exampe 2 - Graupner FM 314

A low priced, used FM314 is optimally suitable for flight simulators and for buddy box operation. Unfortunately, themanufacturer doesn't offer any body boxes, however, it can be upgraded easily with the same parts as with the mc15. There is the FM314 in 2 different versions, that don't differ externally however.

v1: used signals are 2 GND and 1 PPMOUT on the transmitter's circuit board

v2: used signals are 1 GND and 4 (or 5) PPM OUT on the transmitter's circuitboard, right beside the connections for the axis resistors

The signals are connected though the same two resistors with the female stereo jack plug: If the male jack connector isplugged in, its top is connected with PPM-Signal and the middle with GND.

This is FM314 v2.On the circuit board right beside the connectors for the axis resistors is the 5-pin row. GND is the most upper pen,PPM-Signal of the 4th. GND is connected through a 100 ohm resistor with the middle contact and the PPM-Signal