hi,

i opened an old cd-rom and got three hall effect sensors.these are having 4 terminals.i tried finding the datasheet but i could'nt.so anyone please post the datasheet or tell me the circuit connections of the sensor?

 

Is there a part number marked on the device? If you can porvide a part number then we may be able to locate a datasheet.

hgmjr

 

no there is'nt.its very small and has nothing written on it.

 

Try tracing out the circuit board that you removed them from.

One lead is going to go to ground, and one to +V. A third lead will be the output signal. Hard to say what the 4th lead will be; it may be that ground or +V is on two of the leads.

 

Hello,

On this page of the EDUCYPEDIA you will find some links with information on hall sensors:
http://www.educypedia.be/electronics/sensorshall.htm

I have also attached a datasheet for the KMZ10 hallsensor of Philips.

Greetings,
Bertus