Become a Member
Members Only​
Article

Magnetic Flux Density Meter

with a simple pick-up coil

Magnetic Flux Density Meter
Magnetic Flux Density Meter
How do you know accurately if a magnet is stronger or weaker than one you’ve dubbed your reference device? This simple to build instrument has the answer.
Log in here as a subscriber to read the article.

This is a MEMBER ONLY article. You need a subscription to read this article.

Benefits of a subscription
  • Unlimited access to online Member Only articles
  • 3 new editions Elektor Magazine (digital)
  • More than 5000 Gerber files
  • 20% member discount on e-books (at elektor.com)
  • 10% member discount on Products (at elektor.com)
View the offers
Available from €5.33 per month.
What is Elektor Exclusive?

Materials

Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends the Elektor PCB Service service from its business partner Eurocircuits or AISLER as the best services for its own prototypes and volume production.

The use of our Gerber files is provided under a modified Creative Commons license. Creative Commons offers authors, scientists, educators and other creatives the freedom to handle their copyright in a more free way without losing their ownership.

PCB

Component list

Resistors:
R1 = * Ohm (100 suggested starting value only)
R2,R5 = 2k7 SMD case size 0805
R3,R4 = 2,2 SMD case size 0805 (e.g., Farnell # 310-4515)
R6,R9,R10,R11 = 10 k, SMD, case size 0805
R7,R8 = 100k SMD, case size 0805
R12 = 1k, SMD case size 0805
R13 = 22
R14 = 39k
P1 = 10 preset, Bourns type 3329H (e.g., Farnell # 345-970)
P2 = 10k preset H
Capacitors:
C1,C2 = 2µF2 25V radial
C3,C7 = 100nF, SMD, case size 0805
C4,C5 = 22pF, SMD, case size 0805
C6 = 10µF, 63V, radial
Semiconductors:
D1 = high current Schottky diode, case size SOD-323, e.g., Zetex type ZHCS400 (Farnell # 301-4850)
IC1 = LP2950CZ-5.0
IC2 = MAX4130EUK-T (Maxim) case size 5-lead SOT-23, or MAX4122EUK-T (Farnell # 353-4169)
IC3 = PIC16F876-20/SP, programmed, order code 040258-41 (28-pin narrow DIP case)
Miscellaneous:
K1 = 2-way pinheader
S1 = on/off switch, 1 make contact, chassis mount
S2 = 2-pole, 2-way changeover switch, chassis mount (+ 6-way SIL header if necessary)
S3 = pushbutton, 1 make contact
X1 = 16MHz quartz crystal, HC-49/4H case
LCD1 = LCD, 1 line, 16 characters, with 14-way pinheader
BT1 = battery pack, 4 x 1.5V AA size
Enclosure with battery compartment for 4 AA batteries, e.g. OKW shell-type case V155 (SG155), version III (OKW # A9408338), size approx. 158x95x33 mm
PCB, ref. 040258-1, from ThePCBShop

Discussion (0 comments)

Embed Code