Posted by ivanc |
Nov 06, 2015 @ 05:55 PM | 1,221 Views
I started working on this project a couple of years ago but shelved it due to lack of time and enough interest in it. The original idea was to "decode" the data in a model backup file from the Futaba 8FG and 14SG transmitters and create a utility which would allow me to enter the data through a PC. I still have models not transferred from a Futaba 9C I was using in the past to the 8FG and later to the 14SG. I did have most of my models in the 8FG though and because the 14SG reads directly models from the 8FG I ended up shelving the project without completely "deciphering" the memory mapping of the 8FG and 14SG.
As the new Futaba 18SZ transmitter can not read model files from any other transmitter but another 18SZ, I decided to get the project going again, but this time the main goal would be reading data from 8FG and 14SG model files, converting and saving it to an 18SZ model file.
This is a very tedious process as using trial and error, changing one or two model parameters at a time, moving the SD cards between the transmitters and the PC card reader, then trying to figure out what each byte of changed data means takes a lot of time.
So far only several features in the Function menu work as this is a work in progress. No conversion yet, hitting Convert and save would only save the file in its current format, so it is not very useful so far. Currently I'm emphasizing on reading and displaying the model data from these three transmitter models....Continue Reading
Posted by ivanc |
Feb 09, 2015 @ 11:20 PM | 6,711 Views
I recently got this 6FN. As it was on the no longer legal 72.240MHz frequency and has a broken throttle trim tab but had otherwise clean good sticks and pots I decided to convert it to DSM2 using a Spektrum DM8 module:
There were several issues using the 6FN as is for a DSM conversion:
1. Futaba uses opposite servo movement to stick deflection compared to Spektrum.
2. Old Futaba transmitters use 1310Ás as center pulse length, Spektrum uses 1500Ás.
3. The "half-shot" chain encoder uses pots which are offset from their center position.
4. Switch operated channel 6 would provide too much throw when re-centered for 1500Ás pulse width.
5. Futaba uses ATER channel sequencing while the module expects AETR which it converts to TAER.
6. Provide positive pulse PPM with open collector output for the DSM2 RF board from a Spektrum DM8 module.
7. Limited space inside the transmitter case for the DSM2 RF boards.
Well, the whole idea behind the conversion is to be able to use the transmitter to fly the BNF aircraft under the Horizon Hobby brands - HobbyZone, ParkZone, Blade and E-flite. To be able to do that I decided to convert the transmitter so it emulates a Spektrum DX5e transmitter while retaining most of the electronics and all control inputs. For that I had to do a couple of substitutions - the DX5e uses a 3-position switch for mode select on channel 3 and the spring loaded 2-position trainer/bind switch for panic/bail-out/SAFE mode on channel 6. To maintain...Continue Reading
Posted by ivanc |
Nov 01, 2014 @ 11:47 PM | 6,144 Views
This was another request from Tim S (Warjet1950). Tim didn't want to use the internal module hack to the Evo so I made an adapter board which plugs into the Evo trainer port and a Spektrum DM8 DSM2 or OrangeRX DSM2/DSMX module plugs into the adapter. This is not limited to the DSM modules - any RF module for Futaba 7U, 8U and 9C will work with this adapter, including the Futaba FASST TM-7 and TM-8, the S-FHSS TM-FH, the OrangeRX 433MHz modules.
The board is similar to the one I make for Futaba but it has the s-video style trainer port connector. Because the SD-10G does not provide enough voltage at the trainer port (only 3.3V) an external battery has to be used to power the module. In this regard the adapter is very similar to the Futaba "Z" style adapter. Binding and using the modules is identical as described in that thread but I'll provide links to those posts further down.
The SD-10G adapter board has a separate servo type connector (Futaba style) used to connect an external battery which powers the module. This battery can be a 2S LiPo or LiFe or even a 5- to 8-cell NiCd or NiMH. The adapter board provides protection from battery reverse polarity.
I can provide the adapter board with or without a 2.4GHz antenna and with or without a 2S LiFe external module battery. The antenna is used with the Spektrum DM8 DSM2 module as the antenna the module comes with is big and bulky and intended to go on top of a Futaba 72MHz transmitter using a plastic post. When using an OrangeRX module the antenna that comes with the module is used so you do not need the...Continue Reading
I received several requests to make a version of the adapter board which converts the signal from the trainer port of Futaba radios to the Spektrum DSM2 module to work with the Futaba "Z" transmitters. These are the 12Z, 14MZ and 18MZ and 18SZ.
The issue with the "non-Z" adapter board and the Futaba 12Z, 14MZ, 18MZ or 18SZ is that the adapter board takes power from the trainer port and sends it to the module. The module has a built-in voltage regulator for 3.3V which in order to work properly needs at least 5.0-5.2V. The trainer port of the "Z" transmitters does not provide battery voltage so an external battery power source is needed.
The "Z" adapter board has a separate servo type connector (Futaba style) used to connect an external battery which powers the module. This battery can be a 2S LiPo or LiFe or even a 5- to 8-cell NiCd or NiMH. The adapter board provides protection from battery reverse polarity.
Testing with a 2S LiFe pack:
I also tested the adapter board and module with a 5-cell NiMH pack and it worked without an issue.
This adapter board works also with all other Futaba transmitters with the micro (square) trainer port like the 4YF, 4YBF, 6EX, 6J, 7C, 8FG, 8J, 9C, 10C, 12FG and 14SG but it still requires the use of the external battery as a power source because it is not connected to the power output of the trainer port - the red wire between the trainer port connector and the adapter board is not...Continue Reading
If you decide to use the OrangeRX module you will need to re-flash it using this USB Firmware Update Kit. This allows the module to remap the channel assignment from Futaba's AETR to Spektrum/JR's TAER which is important if you want to fly Spektrum's UMX BNF models and your transmitter does not support channel remapping (4YF, 4YBF, 6EX, 7C, 9C).
What you need to do to use the adapter board with your compatible Futaba radio and the module:
Note that the power switch on the module works only with the higher end transmitters - the 8FG, 9C, 10C, 12FG, 14SG and 18SZ and will not work with the rest from the above list as they do not provide unswitched battery power to the trainer port.
Here is a picture of the finished product:
Here's the prototype I made originally for the Futaba 8FG transmitter - this was before the 14SG, 18SZ, 10J and 8J had come out:
S.A.D. stands for Society of Aircraft Demolishers . Each month our club elects a crasher of the month and he is given a S.A.D. patch. I've got 3 - one for my Hobbistar 60, one for the Cap 580 inverted "landing" at WOT and one for a spectacular midair between my Combat SPAD #1 and another Combat SPAD (the other guy won a S.A.D. patch too ).
BTW, these are not all the crashes I've had - the others were not so "spectacular" so I didn't win the Crasher of the Month patch . And I keep crashing...
I just received another patch (#4). For crashing the Cap 580... again.