Hi, I’ve bought some glowshift gauges (USA)for my MNR build, and I thought I could run it from my mark3 mx5 gearbox. However, it seems these gearboxes
don’t have a speedo take off, so now I presume I need to fit something that will read the propshaft . Glowshift say they only do a gps sensor, and
that’s not acceptable for IVA.
Can anyone shed any light on this please.
Andy
a quick look at
http://glowshift.com/instructions/Accessories/7-8-18-Mechanical-Speedometer-Adapter.pdf
suggests their sensor for the mechanical take off is just a hall sensor, (switching to ground)
and the green wire on the speedo being the sense input.
edit:
http://www.glowshift.com/instructions/7-Color-Series/GS-717_speedometer334.pdf
shows this is the 'normal' operation of the units!
[Edited on 11/6/18 by gremlin1234]
Thanks for the reply,
I did an online chat with them today, they basically said they couldnt help.
So, what do I need to make this speedo work, The mx5 mark3 gearbox speed sensor reads off the abs trigger wheel I believe, which I dont have.
Will this work?
https://www.healtech-electronics.com/wp-content/uploads/SpeedoHealer_v4_with_harness_kit.jpg
Andy
quote:
Originally posted by andyhaase1
Thanks for the reply,
I did an online chat with them today, they basically said they couldnt help.
So, what do I need to make this speedo work, The mx5 mark3 gearbox speed sensor reads off the abs trigger wheel I believe, which I dont have.
Will this work?
https://www.healtech-electronics.com/wp-content/uploads/SpeedoHealer_v4_with_harness_kit.jpg
Andy
Ok, funnily enough I’d just googled magnetic sensors and that demon tweeks page was the top hit.
So does it matter wether I get a magnetic or hall sensor?
hall effect are magnetic sensors.
technically, you could use a reed switch, but thats 'old technology'
Hall effect is a magnetic sensor, but an electronic one, rather than a reed switch. I use a proximity sensor, mounted so as to count the propshaft
bolt heads (at the diff end), without any magnets.
Once you can work out the pulses per mile, I presume that your gauges can be configured for that (as my Caerbont speedo can).
Sorry, but I can't give you any part numbers - it was fitted 19 years ago!
SteveW
[Edited on 11/6/18 by SteveWalker]
That’s fine, I’ll order the Hall effect one from Demon Tweeks.
Cheers for the help.
quote:yes there are many types of hall sensor, some that 'induce' a magnetic field (often the abs sensor type), and some where they use an external magnet.
Originally posted by SteveWalker
Hall effect is a magnetic sensor, but an electronic one, rather than a reed switch. I use a hall effect sensor, mounted so as to count the propshaft bolt heads (at the diff end), without any magnets.
I've just edited my previous post before finding that it had been quoted - I changed "hall-effect" to "proximity" - to cover the fact that it is the type that works without a magnet.
quote:
Originally posted by SteveWalker
Hall effect is a magnetic sensor, but an electronic one, rather than a reed switch.
quote:
Originally posted by gremlin1234
quote:yes there are many types of hall sensor, some that 'induce' a magnetic field (often the abs sensor type), and some where they use an external magnet.
Originally posted by SteveWalker
Hall effect is a magnetic sensor, but an electronic one, rather than a reed switch. I use a hall effect sensor, mounted so as to count the propshaft bolt heads (at the diff end), without any magnets.
quote:
Originally posted by 02GF74
quote:
Originally posted by gremlin1234
quote:yes there are many types of hall sensor, some that 'induce' a magnetic field (often the abs sensor type), and some where they use an external magnet.
Originally posted by SteveWalker
Hall effect is a magnetic sensor, but an electronic one, rather than a reed switch. I use a hall effect sensor, mounted so as to count the propshaft bolt heads (at the diff end), without any magnets.
.
I may be wrong but I don't believe those are hall effect.
They work by having a coil around a magnet, bringing an iron object disturbs the magnetic field inducing a voltage in the coil. They do not require a power supply wherea's Hall effect does at it is semiconductor device usually with a built amplifier.