Robbe Decoder

[Tim CooperParticipant @timcooper90034]

I have just started rewiring a Robbe Dusseldorf I built 15+ years ago. It's a bit of a rat's nest of wiring, as I (then) didn't think to label very much or route the wiring neatly.

The RX is an 8 channel Futaba with a Futaba Decoder for the auxiliary functions. The RX is powered from one of the Esc and the Decoder from a separate battery. The RX will be powered from an Action Distribution Board.

My question is can the Decoder be powered from the Esc or am I better to use one of the small BEC units for power from the main batteries. The Decoder does run 2 servos, 4 small motors and a number of lights, so I leaning towards a separate Bec unit, there seems to be a number rated at 3 or 5 amps.

Thanks

Tim

[Tim CooperParticipant @timcooper90034]

[Dave MilbournParticipant @davemilbourn48782]

Tim

The 5v regulator on the ACTion D/B is good only for 1A so leave that one alone. I would suggest either a UBEC (3A+) or a separate battery pack, if you have the space. Don't forget that running several amps through the decoder is quite a drain on whatever battery you use; if it's the same one as the main motor then that could affect the running time significantly.

Dave M

[Tim CooperParticipant @timcooper90034]

Thanks Dave

I have to have a separate battery for the 12v pump for the water monitors so I will run the BEC for the Decoder off that to save the motor batteries.

Thanks again

Tim

[Dave MilbournParticipant @davemilbourn48782]

Sounds like a good idea, Tim. Don't forget to put suppressor capacitors on the pump motors; you want a nice clean voltage to the decoder.

Dave M

[Dave MilbournParticipant @davemilbourn48782]

Tim

I've just reminded myself of the the various different decoders and their operating voltages. Which model decoder do you have (e.g. #8370 Multi Switch + Prop; 12 + 2) and what voltages are the lights and small motors? It may well be that you don't need a BEC to power it at all. They are quite difficult beasts to fathom until you get the hang of them!

Dave M

Edited By Dave Milbourn on 21/02/2016 09:45:37

[Tim CooperParticipant @timcooper90034]

Dave

The Decoder is the 8370 12 +2, the motors are the small geared Robbe 6v ones (4 of them) and the lights are 6v bulbs (9 of them). I'm sure that I must have the instructions for the Decoder somewhere, if I can just remember where I put it 15 years ago!

Tim

[Dave MilbournParticipant @davemilbourn48782]

Tim

Please PM me your regular E-Mail address and I'll send you what information I have. The motors and lighting circuits must be wired in parallel. The two servo outputs presumably get their power from the connection between the decoder and the receiver. The power supply to the decoder should be the same voltage as the switched devices, so a 6v UBEC will do the job. You could probably get one from China for a quid including delivery, that's if you don't mind waiting three weeks for something that's never been through QC. Personally I'd get this one – by return post from North Wales and with a guarantee **LINK**

Dave M

[Tim CooperParticipant @timcooper90034]

Thanks Dave

Not sure if my PM reply was sent.

Tim.j

[Dave MilbournParticipant @davemilbourn48782]

Tim

Nope, but you're welcome and that's fine as long as you have what you need. Here's a link to a drawing I did which includes one of those very gizmos. **LINK**

Dave M

[KEVIN DUGUIDParticipant @kevinduguid52417]

question what is the difference between the switch decoder and a prop decoder?

[Tim CooperParticipant @timcooper90034]

Kevin

Prop means proportional I.e. the Decoder gives you more proportional channels, switch means the Decoder gives you more switch operated channels. For example the 8370 decoder I have gives me 2 proportional channels and up to 12 switched functions.

Hope that helps.

[email protected]

[KEVIN DUGUIDParticipant @kevinduguid52417]

a little bit ,but can a multi prop decoder be used with multi switch module as I have 8switch module and a 8 prop decoder

[Dave MilbournParticipant @davemilbourn48782]

One decodes the signal from a Multi Prop encoder (proportional rotary knobs on the Tx) and provides the necessary output for direct connection to servos. The other serves to decode a Multi Switch encoder (a bank of 2- and 3-way switches on the Tx) and has switched outputs suitable for lights, small motors etc. There is a third type which combines both switched and proportional outputs for the 12+2 Multi Prop Switch Encoder.

(Serves you right for asking!!)

Dave M

[KEVIN DUGUIDParticipant @kevinduguid52417]

not to clear in the photo , 2 f-14 one has 4+4 multi prop module the other has multi switch 8 module, have 2 decoders

both multi prop 8, no-8042.

will the decoder work the switch module as there not easy to get a hold of now

[Dave MilbournParticipant @davemilbourn48782]

Here is a copy of the F14 manual page which shows all the modules. There are (or were) five different Tx encoders and the on-board decoder for each type is shown directly below it. It seems that the 8042 will operate with the 4+4 encoder but not with the Multiswitch. If you visit my "Dave's Stuff" album and click on the image there it will appear in a larger size. If it's still too small then PM me your regular E-Mail address and I'll send you thje original PDF, which is A4.

If

[Dave MilbournParticipant @davemilbourn48782]

I've just found that if you hover the cursor over the image above (to get a pointing finger) and left-click once you'll get a full-screen image anyway. Clever things, these 'pooters.

DM

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