Myself and some pals have built a DIY Inertia Dyno it works rather well but I want to take it to the next level.
Currently it works by connecting a 55505 hall effect mag sensor to the LPT port of a PC running Dynomec software. The Inertia wheel weighs 200+Kg and can easily take 150bhp at the wheel.
The dynomec software can also analyse the air/ fuel mixture using a wide band lamda sensor through an analogue digital convertor into another pin out on the LPT port.
I know the lamda has 4 connectors, power, earth, signal and heating element but I need to take the feed from the signal line through the ADC.
Anyone got an idea what I can use for the ADC?
In the meantime I will stick a dynorun on youtube and post the link on here
Our new software can measure Air / Fuel mixture but we dont have the hardware box of tricks to support it.
The wide band lambda sensor is put into the exhaust pipe and reads the particulates coming out. This comes out as an analogue signal which is converted to digital (the bit I need) and is fed into the PC via the LPT port and the software interprets the digital signal and displays it on the screen.
If the lambda sensor (exhaust gas analyzer) is being read by the PC LPT port, it's already been converted to a digital signal. Why not read the digital output? But, you've still not said what you want to achieve. You've got significantly more processing power with a PC, it makes no sense to bring that data into a pea-brained Arduino.
Stating you don't have a hardware box full of tricks is zero help. People are going to lose interest real fast unless you stop with the metaphors and start sounding like you know what you want to create.
I dont think you understand what I'm after, I have an analogue signal (the signal from the exhaust gas analyser) and NO its not being read by the LPT port thats how it gets into the PC. Before it gets into the PC it needs to be converted to a digital signal.
I need a way of taking an analogue signal and converting it to a digital signal.
I love great, famous movie lines. That's what this thread has become, a movie line.
"What we have here is a failure to communicate"
I know the lamda has 4 connectors, power, earth, signal and heating element but I need to take the feed from the signal line through the ADC.
Without detailed knowledge of the probe in question, there are zero people in the universe that can spec an ADC from the above data and get it right. I can guess and give you one but it's not going to work. Period.
What's the probe power input voltage and current?
What's the sensor output voltage range?
What's the heating element resistance? How hot does it need to be? How is it controlled?
What ADC sample rate do you need?
What ADC resolution do you need?
What accuracy do you need?
I can keep going but that should be enough for starters. My point is you don't know the above data and even with some research, you probably will not find all the answers. You've said the sensor already has its own analog to digital converter. It feeds a pc. Do you think you're going to replace a pc with an Arduino?
Cheers Tom I havent done electronics and programming in a very long time back in the day 20-30 years ago I had an ONC in electronics with programming Nanocomp micros also programmed in VBasic, C, DCL and SQL scripting but I have forgotten everything now. I have zero knowledge of Arduino and I only came across it googling ADC's
All i know there's a some sort of "DynomecWT-6288i data acquisition box" available from Dynomec. It has 8 analog channels supported. Surely its expensive and you could make your own if you know how their software work..
I did my own motorbike dyno with SimpleDyno software. That's free software and there is a ready program for arduino to support few analog signals. I had also PLX wideband hooked to that and it worked pretty well. The program itself is not good as dynomec i think. But have a look at it to get an idea if you can program arduino to work with dynomec too
