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Dec 04, 2004, 10:00 AM
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Transmitter to joystick interface - any ideas


I've been looking for a CCt to build a transmitter interface that simulates a joystick when connected either by the comm port or game port on the PC. There are loads of PIC-Serial interfaces units for FMS, but this limits the user to FMS and all attempst to get an FMS PIC serial interface to work with Realflight using PPJOY or PPPIC virtualy joy pads fail, and my Son is getting bored with FMS

Whilst I know that there are commercial interfaces that do this for around 30 (I use a USB version from I'm really looking for something I can build myself, but all attempts to locate a working diagram and or HEX code (if a PIC is required) have been in vien

Any help would be welcome
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Dec 04, 2004, 12:45 PM
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Mr.RC-CAM's Avatar
Joystick project:

I believe this site sells the programmed PIC (the hex file not available).

Dec 04, 2004, 12:54 PM
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Originally Posted by Malc C
I've been looking for a CCt to build a transmitter interface that simulates a joystick when connected either by the comm port or game port on the PC.

I achieved excellent results using PPJoy and audio interface. Cable for audio interface is described here: I think the idea for audio interface originally came from CRRCSIM-F3F.

PPJoy is available here:

I have seen installation problems under XP, let me know if you have problems I will dig out my modified INF files.

PPM mode was quite unstable because very precise timing is required and it cannot be done very well under Windows, or perhaps the driver was just poorly written. But the PCM mode worked very well. You can also map sticks to buttons. I used my TX to play Colin McRae Rally and NFS

Dec 04, 2004, 01:43 PM
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Here's another site (in french) how to build one
Dec 04, 2004, 02:44 PM
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RC - Ken lives just down the road from me so I might try and arrange an appointment to collect one of his PICs..

Arne - That looks really interesting, but a bit of a hassel to have all that video dubing software running and having to mod an INI file each time for different TX's - but thanks anyway, I've certainly bookmarked the site

Luap - Thats just what I was looking for - only one problem, it has the schematics, parts list, pictures etc but I'll be Bu99ered if I can find the HEX or ASM codes to program the PIC !! - my French is very basic which don't help !
Dec 04, 2004, 03:02 PM
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You have to pay to get the programmed chip.
Dec 04, 2004, 03:09 PM
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How much ?? - I can't find it anywhere (site does jump about a bit !)
Dec 04, 2004, 03:14 PM
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9 Eur if you send the 16F84 PIC or 22 including it.
Dec 04, 2004, 03:46 PM
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Ouch - I can get a TX to USB interface readymade for around 35 euro, which would be plug and play rather than build, plug and pray
Dec 04, 2004, 05:01 PM
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Fredovitch's Avatar

Maybe what you are looking for...

Hi MalC,

Check out this design by a russian enthusiast modeler:

As far as low cost is involved, this design uses a trick to 'cheat' the game port and so doesn't use any costly digital pots you find in other designs

I must say though that I haven't tested it. See here what seems to be an improvement of this design by a czech developper
it's a pity - no english version!

hope it helps
Dec 04, 2004, 05:33 PM
Registered User
I found the first site earlier this evening, but both my programmers only support Microchip PICs and nothing else..

That latter Czech site looks good, but again same problem... I clicked on some of the links and it took me to another site which has a update to a manual in english for a TX to USB PC interface, but I couldn't find an details as to schematics or if the unit was for purchase only.

Thanks for the links though, more sites to bookmark
Dec 04, 2004, 06:04 PM
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Fredovitch's Avatar


TX to USB interface... with a PIC and .hex files here

(in french, click on 'on-line translation' for english or german)
Dec 04, 2004, 06:19 PM
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Fredovitch's Avatar


By the way there seems to be a little mistake in the schematics. The PIC is labeled 16C645 but this reference is not a valid Microchip part number.
Fortunately, you can read on the pictures that the PIC is a 16C745.
Didn't test it though.
Dec 04, 2004, 07:02 PM
Registered User
That'll teach me to read the e-mail first rather than the full thread first - just spent ages searching for a PIC16C645 !!!

Thanks for all your help, my bookmarks has increased, and I've something that is very workable (assuming the code works).
Dec 05, 2004, 07:41 AM
Registered User

Using Bablefish I got the following translation

"The Pic microphone-controller must be with the precondition programmed with the binary file simpic.hex.

For the programming of the Peak, you can contact me in Francois."

I've sent an e-mail to ask for the programming details, but what do you make of the "pre-conditioning" of the PIC.

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