I did read on the speeduino forum that 1 wire sensors don't work well. I think just getting a later thermostat body with more holes would be best option. 

On 2/23/2021 at 5:19 PM, Zed Head said:

What do you mean by "digital" signal?  You'll need some sort of converter to use a thermistor or thermocouple reading.

That might determine the type of sensor you need which could determine where you put it.

He doesn't. He mentioned a stock GM coolant sensor (like most standalone ECU's use) which is a standard thermistor type sensor with an analog signal (a variable resistor whose resistance changes with heat) - he just doesn't realize it's not digital... The stock Datsun coolant sensor has very close to the same characteristics as the GM sensor. I don't fault him for using the GM sensor - it's cheap, plentiful, standard, and well supported - even though it's not digital...

Edited February 28, 20214 yr by cgsheen1

44 minutes ago, cgsheen1 said:

He doesn't. He mentioned a stock GM coolant sensor (like most standalone ECU's use) which is a standard thermistor type sensor with an analog signal (a variable resistor whose resistance changes with heat) - he just doesn't realize it's not digital... The stock Datsun coolant sensor has very close to the same characteristics as the GM sensor. I don't fault him for using the GM sensor - it's cheap, plentiful, standard, and well supported - even though it's not digital...

Not sure why you're responding to me.  Digital signals are possible.  He said that he didn't think the GM sensor would work but he didn't say why.

You've extrapolated quite a bit, from the whole thread.  I had one post to work from.  Still, an interesting discussion...

Edited February 28, 20214 yr by Zed Head

Right, I know the sensors don't give a digital signal themselves. I meant to ask how to get a clean signal for my digital ECU.