HardLabs

Cable Test Master

juniperlynx·Cable-Tester·Kicad Files/Master/Cable Test Master.kicad_pcb

Cable Test Master PCB layout, top view — open source AVR/Arduino board by juniperlynx
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About the Cable Test Master PCB

Cable Test Master is an open source AVR/Arduino PCB design by juniperlynx, published on GitHub under the MIT license. It is a 2-layer board measuring 50.8 × 61.6 mm, with 59 components from 16 distinct parts.

Its main chip is the ATTINY24-SS, from the AVR/Arduino family. Other key parts include the 78L05. By type, the board carries 18 transistors, 12 resistors, 10 LEDs, 9 diodes, 4 connectors and 3 capacitors.

From the project

Simple RJ45/RJ12 cable tester using ATtiny24

Schematics and PCB layouts are available for both ends. The current revision of the Gerbers is untested but only contains slight variations from the most recently ordered version. Complete BOMs for both the master and remote ends are now available for both ends along with Digikey shoping carts in .csv format. I haven't been able to find a source for the multi-LED standoffs used to space the strand indicator LEDs so I've modeled a part in OpenSCAD. The OpenSCAD source and a rendered .stl file are available but untested at this time.

Main components on the Cable Test Master

ATTINY24-SS78L05

Cable Test Master bill of materials (BOM)

59 components, 16 distinct parts.

QtyPartRefs
1
ATTINY24-SS
U1
1
78L05
U2
9
BSS84
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +1
9
2N7002
Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17 +1
1
RJ45
J1
1
RJ12
J2
1
PWR
J3
1
ISP
J4
1
DP3T
SW1
10
LED
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +2
9
D
D1, D2, D3, D4, D5, D6, D7, D8 +1
2
1u
C1, C2
1
0.1u
C3
9
200
R1, R2, R3, R4, R5, R6, R7, R8 +1
1
1K
R10
2
10K
R11, R12

Cable Test Master design files

The KiCad project lives in the juniperlynx/Cable-Tester repository on GitHub; these links point at the commit this page was built from.

Cable Test Master: common questions

What microcontroller does the Cable Test Master use?

The Cable Test Master is built around the ATTINY24-SS, from the AVR/Arduino family.

How big is the Cable Test Master PCB?

The Cable Test Master measures 50.8 × 61.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Cable Test Master?

59 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Cable Test Master design files?

From the juniperlynx/Cable-Tester repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Cable Test Master design in my own project?

Yes, under the terms of its MIT license, which juniperlynx chose for the repository.

Can I test firmware for the Cable Test Master without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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