Any Experiece With A Hall Speed Sensor?

Has anyone ever used a universal hall magnet sensor to convert their speedo to any electric unit?

Seems to me a few magnets on the ujoint of the rear prop shaft could make for some better accurate speeds than a jumpy needle on the old mechanical gauge.

 

I have remedied the jumpy speedo by straightening out the inner cable at the transfer case. Take out the whole cable and lube it , make sure its not in poor condition or buy a new one. I have looked at GPS speedo systems, but they are not cheap.

The rpm of the pickup would have to be calibrated to make it have the pulses it needs to indicate the desired interval, speed.

 

What 47v6 said. If everything is in good working order you won't have a jumpy needle. Might also do a search as this has been covered a lot with different fixes.
Old school aftermarket cruise control kits used magnets like you describe. Very problematic. Not accurate enough for a speedometer in any case. If you want to go to an electronic speedometer either a gps unit or one that uses a sensor, commonly hall effect, that hooks directly where the cable would on the transfer case are much better options.

 

I'm wondering why extreme accurracy is even needed.

 

x2.

 

Because when I do something, I want it to be right. Im not happy if its half-assed.

 

Yea, I believe the Autometer universal sensor calls for a 2 mile calibration and counting revolutions during that distance. Then its set. Curious on how accurate it is. Hard to find reviews on it.

I may give it a go and make a writeup on it.

 

For a school project, I used a hall effect sensor and an Arduino to make a speedometer. I first used a LCD display, but then decided to use a servo instead to move the needle of a traditional speedometer. So what you suggest is possible. However, I think it would be easier to just fix the original system.

 

Bicycle speedometer works well and is accurate. There are also speedo gauges for ATV and such that work well.
Trail tech is one of them that works good.

 

The Autometer sensor / speedometer calibration calls for a 1 mile calibration. At least the one that I am using in my '45 GPW does. There is no need to count revolutions. The installation couldn't be any simpler. Install speedometer and sensor, wire the unit per enclosed diagram, find a measured mile and calibrate per instructions. Based on the highway mile markers and the speed of the others cars in traffic, it appears to be very accurate.

 

I agree, but in general that is easier if one keeps the stock conformation.

 

I have been looking into this as well, I have replaced my speedo head 3 times, the original lasted from 1978 to 95. the replacement lasted until 2013 and the current one just died on my last Socal trip in April. I don't want to make a digital dash, I just want to stop buying speedometer heads.

Jay