Date: Mon, 24 Feb 2003 11:16:07 -0600

Author: Jack Boparai

Subject: Re: Homemade Hall Effect Sensor


Hi Gerald:

Some instructions on making Hall measurements from a doped wafer are in the
following literature:
1. Adrian C. Melisinos, "Experiments in Modern Physics", page 90, Academic
Press, 1966.
2. Daryl W. Preston, Eric R. Dietz, "The Art of Experimental Physics", page
312, John Wiley & Sons, 1991.
I hope that is what your are looking for. Many years ago, when I had to
make doped germanium samples, I used to follow the procedure from
Melisinos. The trickiest part is making the contacts to the doped wafer
If you could not find the books, please let me know. I could fax or email
information from those 3-4 pages. Jack

At 09:13 AM 2/24/2003 -0500, you wrote:
>Thanks to all for the good help so far on this matter of making a homemade
>Hall Sensor.
>What I need is info on how to make the chip itself. I do not need the
>info about the electronics used to sample the Hall voltage from chip. Has
>anyone actually made the chip from a doped silicon wafer?
>This demo listed in the PIRA 200. Has someone made a Hall sensor chip? It
>is PIRA reference number 5M10.10, a Meiners article that says "A
>rectangular strip of n-doped germanium with a resistance of 35 Ohms per cm."
>Any body have experience to share on how to make the Hall Effect chip? Jerry
>At 08:33 PM 2/22/2003 +0000, you wrote:
>>since we are all asking me too
>>>From: Andy Graham
>>>Subject: Re: Homemade Hall Effect Sensor
>>>Date: Sat, 22 Feb 2003 15:02:05 -0500
>>>Hello Lawrence,
>>>Yes I would like to receive a copy. How about an apparatus note to The
>>>Physics Teacher?
>>>(Associate Editor TPT)
>>>"Lawrence B. Golden" wrote:
>>> > If you are interested in using a Hall Effect IC chip to measure
>>> > magnetic fields, here's another Am.J. Phys. article.
>>> > Lawrence B. Golden, James R. Klein, and Luisito Tongson ; Am. J. Phys.
>>> > 56, 846 (1988) ,
>>> >
>>> > "An introductory low-cost magnetic field experiment"
>>> >
>>> > The chips referenced in this article and the earlier Bender article,
>>> > however, are no longer available. During the Fall semester, I had to
>>> > update our set-ups and had to use a new chip and a revised circuit. I
>>> > can forward the circuit and specs if anyone is interested. Total cost
>>> > of the electronics was under $25 per set-up.
>>> >
>>> >
>>> > -----------------------------------------------------------------------
>>> > Lawrence B. Golden, Associate Professor of Physics
>>> > Penn State University - Scranton Campus
>>> > 113 Dawson Bldg.
>>> > Dunmore, Pa 18411
>>> >
>>> > (570)963-2554
>>Protect your PC - get VirusScan Online
>Gerald Zani e-mail:
>Manager of Demonstrations phone: (401) 863-3964
>Department of Physics FAX: (401) 863-2024
>Brown University Providence, RI 02912-1843 USA
>Do a little more of that work which you have confessed to be good,
>Which you feel that society and your most Just Judge rightly demand of you.
>Cultivate the tree which you have found to bear fruit in your soil.
>If you have any experiments you would like to try, try them.
>Now's your chance.
>Henry David Thoreau, Journal entry, 1850.

Best regards,

Jack Boparai
Physics Teaching Lab Specialist
Department of Physics, University of Illinois at Urbana-Champaign
Loomis 326, MC-704
1110 West Green Street
Urbana, IL 61801
Tel: 217-333-2208 Fax: 217-333-9819 Email:
Physics Dept web homepage:
From Mon Feb 24 12:37:27 2003