HardLabs

Tem cell

PetteriAimonen·tem-cell·lisn/lisn.kicad_pcb

Tem cell PCB layout, top view — open source board by PetteriAimonen

About the Tem cell PCB

Tem cell is an open source PCB design by PetteriAimonen, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 50 × 49 mm, with 32 components from 15 distinct parts.

By type, the board carries 11 resistors, 6 diodes, 5 capacitors, 4 inductors, 3 connectors and 1 switch.

It belongs with the test & measurement designs in this gallery.

From the project

DIY TEM cell design for EMC measurements

This repository contains FreeCAD and KiCad design files for a TEM cell with integrated LISN.

When combined with a spectrum analyzer, it can be used for EMC pretest measurements.

More construction details are available in my blog article.

The TEM cell consists of three conductive layers: shield on the top and bottom, and septum in the middle. The width and spacing of the conductors determines the characteristic impedance of the transmission line. The default dimensions are designed for an impedance of 50 ohms, matching most measurement equipment.

Tem cell, from the project README
From the project README

Tem cell bill of materials (BOM)

32 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
108-0902-001
IN+
J1
1
108-0902-001
IN-
J2
1
RF2-145A-T-17-50-G-HDW
SMA
J7
1
CM7060M132R-10
CM7060
FL1
1
JS202011JCQN
DPDT
SW1
1
SWB2010-SMLD
SWB2010
T1
4
DSS16U
DSS16
D1, D2, D3, D4
2
BAT54GW
D5, D6
4
SDR0805-220ML
22µH
L1, L2, L3, L4
5
C1210J105K1RAC7800
1µF
C1, C2, C3, C4, C5
4
50
R1, R2, R3, R4
2
82
R5, R6
1
30
R7
2
68
R8, R9
2
100K
100k
R10, R11

Tem cell design files

The KiCad project lives in the PetteriAimonen/tem-cell repository on GitHub; these links point at the commit this page was built from.

Tem cell: common questions

How big is the Tem cell PCB?

The Tem cell measures 50 × 49 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Tem cell?

32 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Tem cell design files?

From the PetteriAimonen/tem-cell repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Tem cell design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which PetteriAimonen chose for the repository.

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