PIC
  • on Test & Measurement
  • Published in issue 7/2010 on page 29
About the article

PIC RJ-45 Cable Tester

(Summer Circuits 2010 article)

This RJ-45 cable tester automatically checks cable continuity and tests the connection configuration. Each of the eight connections is checked independently and short-circuits are detected.
The circuit can be built using either a PIC16C62B or a PIC16F72.

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Products
Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor 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 its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Resistors
R1 = 10 k-ohm
R2,R3R4,R6,R7,R9,R10,R11,R12,R14 = 330 ohm
R5 = 560 ohm
R8 = 2.2 k-ohm
R15 = 10 k-ohm x 8 resistor array
R13 = 56 k-ohm

Capacitors
C1 = 20pF ceramic
C2 = 100nF ceramic

Semiconductors
T1 = BC327
T2 = BC337
D1 = LED bar, 10 LEDs, e.g. Kingbright DC-10EWA
IC1 = PIC16F72, programmed, Elektor # 090643-41

Miscellaneous
BT1 = two 1.5 V AA batteries with holder
K1,K2 = 8-pin RJ45 connector (socket), PCB mount
S1 = pushbutton, 6x6mm, e.g. Omron B3W-100
PCB # 090643-1
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