Caterham tacho - possible use to show RPM

One of the many items acquired at auction sale for little outlay was Caterham tacho - EET3-1A32-00B marked as 0-8000 rrm (dial just 0-80) 4cyl - it as a strange to me 6 pin connector - I can find no info as to how to drive it - my idea is to use a cheap arduino to interface - can anyone advise - it looks undamaged and case is marked ok but I have no guarantee it still works sorry title should be RPM of my mill

Edited By Frances IoM on 15/11/2020 14:46:38

Fixed the title typo for you! Dave

Edited By SillyOldDuffer on 15/11/2020 14:54:42

I would start by looking here: **LINK**

https://www.lotus7.club/forum/techtalk/random-rev-counter

and continue by wondering if it’s worth more to them than you could buy an alternative for.

MichaelG.

If it says 4 cyl on it then it's probably an electronic one triggered by the coil low tension side or even an inductive pickup. When you buy after-market ones they usually have a selector switch to set the number of cylinders so that it reads true, because different number of cylinders usually means different number of pulses per rpm.

.

Sorry to have wasted your time ... I presumed that, as they were discussing the existence of two different pin-outs, it might be worth contacting them.

MichaelG.

Ditto, i would have thought that to be the perfect place to get info.

Hi, this might be useful. **LINK**

Maurice

Hi ,this link gives you the name of the maker .Put name in google ,to find website ,this has instructions for gauges .

I think you might be able to drive it direct from a Hall sensor

Maurice

Edited By Maurice Taylor on 15/11/2020 21:51:20

I'd be tempted to sell it and use the money to buy something more fit for purpose.

Hi ,Have you had a look at makers website and downloaded instructions ? Why do you need to get it out of case,connections and switches should be on back.

Maurice