Shift Light Issues

[Vpgts076]

Hi Guys,

Hope some can help with my issue.

I brought a cheap eBay shift light to utilise the circuit to place into a commodore cluster....

The issue is that it will not read the signal that I am creating on my signal generator.

I have tried a V8 and V6 signal and gauge works but shift light doesn't.

Shift light does illuminate if set to under 1K even when green signal wire is disconnect.

V8 Signal = K1 & K2 looped
6 Cylinder = K1 Loop cut
4 Cylinder = K1 & K2 Loop cut.

Please Note at back of circuit orange and brown wire is to indicate loop that it contained from factory. NOT UTILSED.

IMG_0369.JPG

IMG_0368.JPG

Any ideas?

Thanks
Daniel

[antus]

I cant speak for that circuit, but you could run a shift light from the '808, or more than one via the flex outputs.

[Vpgts076]

I cant speak for that circuit, but you could run a shift light from the '808, or more than one via the flex outputs.

Yeah I agree but I am supplying change over clusters with shift lights as per below... PLUG and PLAY.

Custom 250km cluster with shiftlight.jpg

[Vpgts076]

I have done some homework and as the circuit sits it doesn't work IE signal into A.

but if you plug the signal into B or C it works but led is delayed.

and ideas what the 10K, 820 & 3.9K resistors do?

[Holden202T]

if you can get better pictures showing the pcb underneath and the top with numbers on stuff someone with electronics skills might be able to assist you more.

[Vpgts076]

Thanks for the tip Holden202T

[antus]

That picture doesnt seem to be working, but I think it looks like a voltage divider to bring the volts down, and as the size of the resistors is so large it looks like its meant to be driven from a coil rather than a logic level signal from a coil pack. But im sure someone else can describe it better or may see it differently.

[Vpgts076]

That picture doesnt seem to be working, but I think it looks like a voltage divider to bring the volts down, and as the size of the resistors is so large it looks like its meant to be driven from a coil rather than a logic level signal from a coil pack. But im sure someone else can describe it better or may see it differently.

LMAO...... You are the man.. set my signal generator to 50/60 model for coil signal and worked but there is a massive lag between rpm and led.

Both videos shift light is set at 3K

Slow ramp up.


real life test.


ANY IDEAS? or just a cheap circuit?

Thanks
Daniel.

[vlad01]

That picture doesnt seem to be working, but I think it looks like a voltage divider to bring the volts down, and as the size of the resistors is so large it looks like its meant to be driven from a coil rather than a logic level signal from a coil pack. But im sure someone else can describe it better or may see it differently.

sounds right to me.

[j_ds_au]

antus is right, looks like a voltage divider (on the green wire) to suit 12V signals or higher.

Not sure about scale/size, but think the resistors look like 1/4W and 1W types.

Beware, you risk blowing things up feeding signals to B and/or C, the input is definitely A (green wire).

Finally, speed of response will be a function of the PIC firmware.

Joe.