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How to wire a relay to come on at 3000rpm
Moderator: -Scott-
How to wire a relay to come on at 3000rpm
I want to wire an injector to spray at 3000rpm's . Im going to have two extra injectors. One will come on at 1.5lb boost the other at 3000 rpm. I need to know how to wire the second injector up please.....
Remember some days your the pigeon and other days your the statue
Get something like this:
http://cgi.ebay.com/ebaymotors/ADJUSTAB ... 06.c0.m245
... and hack it to operate a relay instead of (or as well as) the lamp.
Easiest bodgy method I can think of.
http://cgi.ebay.com/ebaymotors/ADJUSTAB ... 06.c0.m245
... and hack it to operate a relay instead of (or as well as) the lamp.
Easiest bodgy method I can think of.
This is not legal advice.
Not really sure. Tacho with a shift light? Use the shift light output to trigger the relay?
It's probably possible to find some form of process controller with a frequency input; I would expect them to start around $200.
If you're into electronics, some form of high-pass filter feeding into a voltage sensing circuit. Sized appropriately, voltage would increase with frequency (i.e. from ignition circuit), then adjust the trigger for the relay to come on somewhere around 3000rpm.
Edit: the Chimp beat me. Looks like the cheapest & simplest option.
It's probably possible to find some form of process controller with a frequency input; I would expect them to start around $200.
If you're into electronics, some form of high-pass filter feeding into a voltage sensing circuit. Sized appropriately, voltage would increase with frequency (i.e. from ignition circuit), then adjust the trigger for the relay to come on somewhere around 3000rpm.
Edit: the Chimp beat me. Looks like the cheapest & simplest option.
That's a real possibility - but there are some simple workarounds. I've had to install a simple transistor circuit so an electronic pressure switch can switch a solenoid. Four years later, still going strong.chimpboy wrote:If you did go the el cheapo shift light option, I think you'd want to make sure it runs an incandescent globe not an LED, if it runs an LED it might not be able to trip a relay... not sure.
The Jaycar kit looks the goods.
led
Thats exactly what I need. Thanks a heap
Remember some days your the pigeon and other days your the statue
For those interested in all the electronics kits jaycar do for cars then check out:
http://www.jaycar.com.au/productView.as ... BCATID=662
I got given one for free when I bought a heap of stuff there. Quite a handy book. Goes over how each kit works and in what way it can be used. Worth the money IMO if you like tinkering with you car.
http://www.jaycar.com.au/productView.as ... BCATID=662
I got given one for free when I bought a heap of stuff there. Quite a handy book. Goes over how each kit works and in what way it can be used. Worth the money IMO if you like tinkering with you car.
-Scott- wrote:Isn't it a bit early in the day to be pissed?
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