[Mr_DJT]

Hi all,
i've been searching the forum for an answer but i'm unable to find 1.

What i want to do is run the SCx light from a soloon digi chip, head, tail and brake.

I was going to just wire the light pcb's directly to the chip but after reading some posts regarding blown light as scaly has more power, i'm now unsure.
Also i have a 3rd pcb conected to the lights which i'm not sure what its function is.

I was ready about adding resistors but their doesn't seem to be any definitive answers.

The red circle is the 3rd pcb in question and the blue circles are where i was planning to connect to the scaly chip. (sorry about the pic quality i took it with an old mobile)

Thanks
Darren

 

[GregK]

Hi Darren,
Simple enough ..... here's a LINK

All the best - Greg

 

[Mr_DJT]

Thanks for the reply Greg, I found that 1 but it doesn't explain the 3rd pcb as I think that's for the older SCX cars.

 

[GregK]

Without a better picture, I would say that the third PCB is a lighting board with resistors, LEDs and possibly diodes.

 

[MrFlippant]

The photo looks a lot like that car is a newer model that comes with the "analog chip". It's a piece that is taken out and replaced by their SCXD chip for quick and easy digital conversion. If needed, I can pop one out of one of my cars and slap it on the scanner, but I believe Greg is right that it has a couple resistors and diodes on it. Although I didn't do anything special to the SCX car with lights that I chipped, and they haven't burnt out, they don't seem to like the direct rail power so much, and they flicker a lot. I think it's still a good idea to follow the guide in that link as Greg suggested. Run your wires from the SSD chip to the resistors as stated in the guide, and then to wherever the contact "tines" on the body are, the ones that touch the pads on the analog chip.

Oh, and I had some cars that the lights were really bad on, just analog cars in analog mode. No surprise, but a quick INOX treatment on those contact pads fixed it right up, and the lights were nice and bright and constant ever since.

I was hoping to find some time to use one of those SCX analog chips to make an SSD chip that powers the light pads and motor pads so that the same chip could be installed into any recent SCX car without any special work to the car itself. The DPR chip is probably the way to go for that idea.

 

[Mr_DJT]

ok i've scanned all the bits in question.
I dont think its an analog chip as it sits ontop of the contacts going to the motor the only thing connected to this are the lights.

All i'm after doing to wiring the lights directly to the scaly digital chip, and having brake and tail lights. but im not sure if this board in question needs to stay in the circuit.

Board Front:

Board Back:

Light board it connects to via the front of the main board (x2):

Main board in housing with connectors:

Housing without board:

 

[MrFlippant]

Great photos. The housing plus main (lighting) board is what I refer to as the "analog chip". I call it that because it's a unit with which the car will not work in analog mode. It passes the power from the pickups to the lights and motor. It's like the digital chip, except for analog use.

While cleaning up my work bench, I saw the light board. I had forgotten that I removed it and have the lights connected to the "housing" directly. The lights still work great in analog mode. I guess depending on voltage, you risk blowing the LEDs, but we never race at that level, so it wasn't a problem. On SCX systems, running at 15v, it would probably be a problem over time.