There is a yahoo group dedicated to modding the VEX controller: http://tech.groups.yahoo.com/group/VEX_Modders/
All of this has been discussed in that forum. Also there is some discussion on the AllElectronics site: https://www.allelectronics.com/index.php?&page=item&id=JS-6&index=1 Receivers to go with this transmitter. This is a great 6 channel transmitter for the price. It needs to be paired with a proper 75 MHZ (ground) receiver. You can get an inexpensive 6 channel receiver from HobbyPeople.net. It's the Cirrus MRX-6. http://www.hobbypeople.net/gallery/443536.asp The Cirrus receiver says 72 MHZ but also works on 75 MHZ. Just plug in your VEX crystal. You can also get a receiver from Tower Hobbies that will work. Futaba R168DF 75mhz Receiver. http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXLSX5&P=7 However, you do need a special Dual Conversion crystal for this Futaba receiver that's on the same channel as the transmitter (FUTL59**). The VEX crystal won't work. Dont be afraid to get this transmitter. I have several Standard Futaba receivers that were Plug and play. Herer is a link to a really cool mod: http://kronosrobotics.com/Projects/remote.shtml Andy ________________________________ From: Tom Lum <[email protected]> To: R/C Tank Combat <[email protected]> Sent: Wednesday, February 18, 2009 12:48:54 PM Subject: [TANKS] Re: Surplus Vex Radio and Surplus Linear Actuator I emailed Hitec to see if they thought the receiver Steve mentioned would work on 75Mhz, they had this to say... Hi Tom, Unfortunately, the mini 6 will only work on 72mhz. Regards, Tony Ohm Hitec /Multiplex USA 12115 Paine St Poway, CA 92040 858.748.8440 So, unless someone is wiling to try one, a micro-controller will have to be used to receive the signal. Tom Lum Topic changed again back to Vex Radio On Feb 16, 5:49 pm, SteveH <[email protected]> wrote: > Yo, tankers! > I've just received one of the remarkably cheap Vex radios that are > going for $9.99 on the surplus market (this one's from Marlin P. Jones > (www.mpja.com, item number 17044 MI). You did NOT misread that. > > NOTE: The receivers for these units DO NOT demultiplex the individual > PWM channel signals, you must do this externally with a > microcontroller or a simple logic circuit. Otherwise, it's a "normal" > R/C unit. > > Since I do microcontrollers for fun, this is not a barrier to me. > > I am blown away by the excellent build quality and functionality of > this radio system, folks. The 6-channel transmitter has plug-in TX and > RX crystals, programmable servo mixing, exponential throws, 6 storable > control configurations, battery voltage display, a "tether" output > that bypasses the receiver to test the circuitry the receiver > controls; all the sorts of things you'd want in a mid-range R/C > transmitter. It is VERY solidly made, and has 4 actuator buttons on > the back that are suitable for fire or traverse functions. Vex did a > VERY nice job on these units; it suggests that their other products > are also well made. > > At $10, this is an incredible bargain. MPJA have 31 in stock as of > this writing, down from 61 last week. > > Downsides: 1) No charger jack for the tranny, gotta use AA NiCd or > NiMH cells and charge'em separately. 2) Radio range is unknown as yet, > but given the obvious high quality of the unit, I'd be amazed if the > range is anything less than the 1/4 mile common to R/C units. 3) Ya > gotta do your own demux. > > It occurs to me that, if there were sufficient interest, this > transmitter/receiver would combine excellently well with Anvilus' Mini > Relay Controller or SSR controller (requiring a 5V regulator for power > and a fairly minor tweak to the Anvilus controller's firmware) and > Voila! Complete tank control system. (It will also work well with a > Gumstix Robostix controller, which has lotsa I/O for R/C servos.) > Since I'll be doing most of this anyway for myself, I would be > entirely willing to provide the necessary tech data, and probably the > microcontroller code, to accomplish this feat. Of course, once the > supply of surplus TX/RX units goes, the design will be an orphan (or > maybe not; I happen to know that the 3-pin power connector on > Airtronics VG series receivers outputs the same kind of multiplexed > pulse stream as the Vex receiver, and other radios may do similarly.) > > Now for the other item: I notice on the back page of the MPJA catalog > item #17265-MD; this is a lead screw assembly with a DC motor and > incremental feedback encoder, much like one I cobbled together for > Sancho Panzer's main gun elevate mechanism. At $30, it's not way > cheap, but it's still well worth considering as an elevate mechanism. > > Regards, Steve --~--~---------~--~----~------------~-------~--~----~ You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat -~----------~----~----~----~------~----~------~--~---
