Add two more TX/RX Channels to your LXX Bit
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Original credits go to Kamikaze and Microsash of http://www.bit-racer.de/ for the original idea, http://www.universalhost.de/html_bit/1moreTX.htm.
This mod basically gives shows you that there are two more channels available on the LXX bits. You can do with them what you want. This is not limited to LXX bits. Basically if your car/controller uses the 6C chipsets, that is TX6C in the controller and RX6C in the car then you can do this mod.
The LXX perfection series is a good series to start with because they have the TX/RX6C chipsets AND the controller already has an extra button not being used at all. This mod I have based on the LXX perfection series for this very reason.
From the datasheets for these chips you can get the pin for pin functional layouts. I have cirlced in red the two extra functions:
TX6c – In the Controller
RX6c – In the Car
Finding these pins is quite easy.
On the LXX transmitter PCB we look for pins 9 & 15. They are the pins circled in yellow.
On the LXX receiver PCB we look for pins 6 & 8. They are the pins circled in yellow.
To activate these two channels you need to short the input pins on the TX6C chip to ground/earth/neg, whatever you want to call it. When this happens there will be on output of 3V on the respective pin on the RX6C chip.
In an example of this mod (mainly for proof of concept) I am going use one of the channels to light up a blue LED. This is very simple but the mod has many exciting opportunities for use….
So I m going to use only one of the two extra functions available to me. First of all I want to wire up the extra button on the LXX perfection controller. All I need to do is solder two wires. No stuffing around with drilling holes, adding switches or anything….
Then I connect this button to one of the extra channels, in this case I m using the function F1 channel on pin 15 of the TX6C chip. I connect it between pin 15 and the ground/earth ( in this case the -VE battery terminal).
On the car I ve soldered a blue LED from pin 6 of the RX6C chip to ground/earth. There s no pic of this, it s pretty straight forward.
And here s an animated GIF showing that when I press this extra button now the LED on the car lights up.
Pretty cool huh? 🙂
This mod has many exciting applications and you ll see me utilising this mod a lot in the future. Now time to go off and buy 100 LXX perfection kits, lol……
ph2t.
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as micro amps mentioned f1 is available on tomy booster pcb’s, but not connected. i got ph2t to show me how to connect it and it’s simple to do.
for the tomy controller, the same chip is used so wire up a switch to f1 as explained by ph2t. (and you can wire up f2 on a tomy tx which will control f2 on lxx booster rx’s of the same frequency.)in the pic below i’ve marked 5 solder pads with yellow dots which have nothing connected. i’m told the left 2 are for a resistor and the remaining 3 are for a transistor (any ideas as to exactly what sort?). solder a short piece of wire across the 2 pads which are circled in red.
so if you want to connect an led to f1, you would connect + to f1 (circled in red) and – to v- (GND)
if you’re getting the red x treatment http://www.geocities.com/bettyksprivatestash/tomyboosterf1.htmlit’s only 1 extra channel but that’s 1 more than none!:8ball:
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as micro amps mentioned f1 is available on tomy booster pcb’s, but not connected. i got ph2t to show me how to connect it and it’s simple to do.
for the tomy controller, the same chip is used so wire up a switch to f1 as explained by ph2t. (and you can wire up f2 on a tomy tx which will control f2 on lxx booster rx’s of the same frequency.)in the pic below i’ve marked 5 solder pads with yellow dots which have nothing connected. i’m told the left 2 are for a resistor and the remaining 3 are for a transistor (any ideas as to exactly what sort?). solder a short piece of wire across the 2 pads which are circled in red.
so if you want to connect an led to f1, you would connect + to f1 (circled in red) and – to v- (GND)
if you’re getting the red x treatment http://www.geocities.com/bettyksprivatestash/tomyboosterf1.htmlit’s only 1 extra channel but that’s 1 more than none!:8ball:
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