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Switching based on steering wheel voltage/resistance
garyo - 17/7/14 at 03:40 PM

Hi Chaps,

I'm looking for a simple solution to a problem I have. It's a typical tin-top set up where I have steering wheel with horn/shift-up/shift-down buttons, all feeding through a single clock-spring cable via a resistance ladder, and from those variable resistances (or voltages) I need to switch one of three relays.

I'd rather not have to try to home-roll a mini Atmel or microprocessor based solution, does anyone know of anything simple/analogue, or even off the shelf, that can give me a head start?

Cheers

Gary

SteveWalker - 17/7/14 at 04:44 PM

LM3914 ?

dave r - 17/7/14 at 05:24 PM

a friend of mine is running his indicators and horn via a bluetooth connection and no cables from the steering wheel....
runs on a 3v battery and goes to sleep after the button is pressed.....

garyo - 17/7/14 at 09:33 PM

quote:

LM3914



I like it - could be on to a winner there Steve!

02GF74 - 25/7/14 at 08:50 PM

Are the resistors in the steering wheel so that the coiled cable has 2 wires (or even 1 wire if the steering wheel is earthed)

If that is the case lm3914 is a simple solution.

[Edited on 25/7/14 by 02GF74]