HOME made digital display for Injectors duty cycle?!?!
04-09-03, 05:56 PM
#1
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
HOME made digital display for Injectors duty cycle?!?!
I was looking to make somthing that i could hook up to my injector signal on the ECU. I want to monitor my injector duty cycle... I was wondering if anyone made some kind of digital display or know someone who has the schematics for this??
04-09-03, 08:31 PM
#4
Senior Member
Join Date: Mar 2003
Location: Seattle, WA
Posts: 519
Likes: 0
Received 0 Likes
on
0 Posts
i bet aaron cake might be able to give you a good answer. his site www.aaroncake.net has a forum that includes a section on electronics where you can ask questions.
04-09-03, 09:26 PM
#5
The mystery of the prize.
all you need is a ADC (analog to digital converter), theres a really simple one for PC's available from http://www.picotech.com that can connect to a parallel or serial port. So you could datalog and plot in realtime any analog signal, including your injectors.
04-10-03, 11:29 AM
#6
Why am I here ?
Join Date: May 2002
Location: Boston, MA
Posts: 671
Likes: 0
Received 0 Likes
on
0 Posts
there is one here:
www.ggimages.com/rx7/pwm.html
It needs to be calibrated with a scope and a signal generator, though.
Hugues -
www.ggimages.com/rx7/pwm.html
It needs to be calibrated with a scope and a signal generator, though.
Hugues -
Trending Topics
04-10-03, 01:02 PM
#8
Eats, Sleeps, Dreams Rotary
iTrader: (1)
Join Date: Jun 2001
Location: London, Ontario, Canada
Posts: 3,106
Likes: 0
Received 0 Likes
on
0 Posts
Easiest way would be to find someone who has an oscilloscope that you can borrow. Another option is to purchase a legacy oscilloscope. I have one on loan from someone to help with a project I was doing. (we're talking circa WWII) Apparently vintage oscilloscopes are quiet cheap and fairly easy to come by. It would be more than sufficient for your applications, but you're going to need a second person and it won't be as robust as your typical gauge.
That picotech thing is quiet cool. You could also hook up a run of the mill ADC and measure the output voltage with an oscilloscope. This solution would likely be a lot harder than that picotech, but cost a lot less.
The problem is with just building a conventional gauge is that the pulse width changes rapidly. Even with a oscilloscope you'd have to try to hold the conditions for a brief period or get a more modern one with hold capabilities. A system like that picotech would be the most informative.
That picotech thing is quiet cool. You could also hook up a run of the mill ADC and measure the output voltage with an oscilloscope. This solution would likely be a lot harder than that picotech, but cost a lot less.
The problem is with just building a conventional gauge is that the pulse width changes rapidly. Even with a oscilloscope you'd have to try to hold the conditions for a brief period or get a more modern one with hold capabilities. A system like that picotech would be the most informative.
Last edited by Snrub; 04-10-03 at 01:05 PM.
04-11-03, 01:33 PM
#9
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
i found this.... EFI Systems Air Fuel Ratio/Injector Duty Cycle Meter does anyone know anything about this unit? good, bad?
http://www.extrememotorsports.com/ggcat/efiafm-l.jpg
http://www.extrememotorsports.com/ggcat/efiafm-l.jpg
04-11-03, 01:35 PM
#10
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
Thread
Thread Starter
Forum
Replies
Last Post
sherff
Adaptronic Engine Mgmt - AUS
9
02-24-19 12:09 PM
Skeese
Adaptronic Engine Mgmt - AUS
65
03-28-17 03:30 PM
