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Phill

Analogue Lambda Gauge

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Any micro electronics engineers here?

I am following a thread on Pelican where a chap is making an analogue Lambda Gauge which looks like the Porsche dials and fits where the clock goes. It is very clever stuff and I would like to do the same.

Now, I think it would be straightforward to take an Innovate analogue Lambda Gauge and rip the internals out and insert them into the donor clock. However, if I spend over £100 on a gauge and ruin it I would be very upset. Plus, I wouldn't be learning anything. So I want to figure out how it works and understand the differences between stepper motors and their control.

What I have learned so far is that there two types of stepper motor, unipolar and bipolar. The stepper motor is controlled by a controller and the controller is fed by the signal, in this case, from the Lambda controller. The lambda controller signal is 0-5v which represents circa 7-18afr. 

But, clearly there is some programming involved to convert the 0-5v to a signal the stepper motor understands, via the stepper controller.

I need to know what stepper motor to use, what controller to use, how to wire/program that controller based on the feed from the lambda controller.

Clear as mud :D

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Arduino for the controller Phill ? 

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I have considered Arduino and do have one but its the programming that is the issue. There may well be an open source program but I haven't been able to find one as yet.

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Just use a fast servo + Arduino - job jobbed.

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1 hour ago, Phill said:

I have considered Arduino and do have one but its the programming that is the issue. There may well be an open source program but I haven't been able to find one as yet.

Programming, how hard can it be ;)

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