Ericmck2000

So, as the title suggests, I need to split a 5v signal.

Reason, I have an holley EFI, and a Fast EZ TCU. Both need a TPS signal.

Right now, I have a splice in the line, but, this is introducing a lot of noise causing odd behavior such as... Holley EFI not "Learning" as much as it should, and erratic shifting / Lockup in the transmission.

For the EE majors here,

How can a 0-5v signal be effectively split, without introducing a lot of noise.


And, before somebody says it, Yes, I am well aware there are remote-mount TPS systems, and other solutions involving a second TPS. However- there is a simple method to accomplish splitting the signal, using electronical components. I just don't know it.

Ericmck2000

Oh, and before somebody links other pages...

https://ls1tech.com/forums/automatic...ignal-dbw.html
https://ls1tech.com/forums/generatio...e-jumping.html
https://forums.holley.com/showthread...ectronic-trans
https://forums.holley.com/showthread...4139#post84139
https://forums.holley.com/showthread...-transmissions
https://forums.holley.com/showthread...ntroller/page2

None of those answer my question.

svslow

You could use a 12V source with a 5V voltage regulator from an electronics store. But splitting the 5V source shouldn't be causing you any issues, there is likely something else going on. Most people with aftermarket ECU's have to split the 5V source 5-10 different ways, and have no issues.

NSFW

You might try a shielded wire, and ground the shield to the ground reference at the sensor.

And try to avoid running your wire near the spark plugs or plug wires.

8.Lug

Twist the pair of wires. This is even more effective than shielded coax type wiring. This is how ABS sensor wiring is routed, it’s also what’s inside Ethernet cable. If you only have one wire, then run a ground wire with it that connects directly to both and twist them together, it’s called a “signal ground”

LSX Power Tuning

iTrader: (4)

pdxmotorhead

I believe the gadget you need is a 5V SIGNAL optical splitter/isolator is a 6 or 8 pin chip that gets a signal in+sig ground and a pair of signal out + grounds, your trying to isolate a dynamic signal.

I would have thought the Holley could repeat a signal for one input to another output but haven't messed with one. Your. other option is a couple of the TPS sensors have shafts that can be made to pass through the sensor, just stack 2 of them one for each black box.