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1  Using Arduino / General Electronics / Re: RPM input circuit from coil on: February 17, 2012, 02:05:15 am
Thanx Magician,
I had a look at the link you posted.
Thay use an inductive pickup on the HT lead.

However I want to pick up the signal directlu from the negative side of the coil.

Any suggestions?
2  Community / Website and Forum / Re: How to change login password on: February 16, 2012, 06:46:36 am
Thanx!

Sorted.
3  Using Arduino / General Electronics / RPM input circuit from coil on: February 16, 2012, 06:45:45 am
I want to build a RPM counter for my car using an Arduino.

The rpm signal need to be picked up from the negative side of the ignition coil.

Now I know there are some nasty spikes being generated.

I need help with a circuit diagram and components to be able to input the rpm signal to the Arduino without damaging it.
4  Community / Website and Forum / How to change login password on: February 14, 2012, 11:45:04 am
As per topic, how do I change my login password?
I've looked through the profile, but don't see an option to change password.
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