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2 layers68 × 40 mmPolarizing coil driver, the printed circuit board in 3D

Polarizing coil driver

marekpechal/projects-efnmr1
Full screenGitHub.kicad_pcb
Size
68 × 40 mm
Copper layers
2
Thickness
1.6 mm
Parts
39
Nets
17
Pads
100
Tracks, vias
135, 54
Pours
7
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
3 Nov 2024
Updated
6 Jun 2025

Overview

Polarizing coil driver is an open-source printed circuit board by marekpechal, from the marekpechal/projects-efnmr repository on GitHub. It is a 2-layer board of 68 × 40 mm with 39 parts on 17 nets, routed with 135 tracks and 54 vias.

It is built around the BSS84, PMEG045T150EIPD and SIR638ADP-T1-RE3. Its parts include 9 resistors, 4 capacitors, 4 transistors, 4 connectors and 3 ICs.

Main components

3

README

README.md

projects-efnmr

Parts

39
QtyValueFootprintReferences
8MountingHoleMountingHole:MountingHole_2.7mm_M2.5H1, H2, H3, H4, H5, H6, H7, H8
710k 125mW 1%Resistor_SMD:R_0805_2012MetricR1, R3, R4, R5, R6, R7, R8
4TestPointTestPoint:TestPoint_Pad_4.0x4.0mmTP1, TP2, TP3, TP4
3Conn_01x06_SocketConnector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_VerticalJ2, J3, J4
2100n 25V X7RCapacitor_SMD:C_0805_2012MetricC2, C3
2BSS84Package_TO_SOT_SMD:SOT-23Q1, Q2
110u 50V X5RCapacitor_SMD:C_1206_3216MetricC4
12N7002Package_TO_SOT_SMD:SOT-23Q3
1330n 25V X7RCapacitor_SMD:C_1206_3216MetricC1
14k7 125mW 5%Resistor_SMD:R_0805_2012MetricR2
1560R 125mW 0.1%Resistor_SMD:R_0805_2012MetricR9
1Conn_01x02Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_VerticalJ1
1GREEN LEDLED_SMD:LED_0805_2012MetricD1
1L78L09_SOT89Package_TO_SOT_SMD:SOT-89-3U4
1PMEG045T150EIPDPackage_TO_SOT_SMD:Nexperia_CFP15_SOT-1289D3
1RED LEDLED_SMD:LED_0805_2012MetricD2
1SFH617A-3X017TPackage_DIP:SMDIP-4_W9.53mm_Clearance8mmU3
1SIR638ADP-T1-RE3Transformer_SMD:SI7469ADP-T1-RE3_VISQ4
1TL331Package_TO_SOT_SMD:SOT-23-5U2

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Questions

How big is the Polarizing coil driver PCB?

It measures 68 × 40 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Polarizing coil driver use?

39 parts, built around the BSS84, PMEG045T150EIPD and SIR638ADP-T1-RE3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Polarizing coil driver KiCad files?

From the marekpechal/projects-efnmr repository on GitHub, at the commit this page was made from: the board is kicad/polarizing_coil_driver/_ordered_241110/polarizing_coil_driver.kicad_pcb and its schematic kicad/amplifier_board/EFNMR_transmit_amp_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Polarizing coil driver design in my own project?

Its repository states no licence, so its author keeps all rights: ask marekpechal before reusing the design.