Hall effect sensor question.

Other Hardware Sensors
1

Hi all,

I have been using a reed switch to measure wheelspeed on a bicycle. It works fine as a digital input but at higher speeds the reading is not excellent.

I would like to sub the reed switches out and use hall effect sensors.

I have some of these sensors: http://australia.rs-online.com/web/p/hall-effect-sensors/1811441/

I thought I would be able to use these sensors as a digital input, but can not get it reading LOW to HIGH.

Can I do it with this sensor?

Any advice would be greatly appreciated.

2

Yes you can do it with that sensor. How have you connected it to the Arduino? Do you have the magnet and the sensor in the correct relative orientation?

3

I get 10k rpm on powetballs (hand gyro thing) and it uses a reed switch...

Of the 2 kinds of hall sensors, you need the cheaper of the kind which simply gived a low/high value depending on the magnets polarity as it passes the hall sensor the more expensive hall sensors give a value of how strong/near the magnet is.

4

but can not get it reading LOW to HIGH.

You need either an external pull up resistor or to enable the internal ones on the digital input you use.

5

These give a low high out...

6

cjdelphi:
http://pages.ebay.com/link/?nav=item.view&id=171071959045

These give a low high out...

There is nothing wrong with the sensor he has got.

7

Grumpy_Mike:

cjdelphi:
http://pages.ebay.com/link/?nav=item.view&id=171071959045

These give a low high out...

There is nothing wrong with the sensor he has got.

Never suggested he should switch...... just merely pointing out there's several kinds of hall sensors on market.

8

cjdelphi:
Never suggested he should switch...... just merely pointing out there's several kinds of hall sensors on market.

You know one day you might actually post something useful to someone. But I won't hold my breath.

9

So much hostility from a grumpy wumpy mikey