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Error Signal

QSUM-UNB·Frequency-Offset-Lock·Error Signal/hardware/Error Signal.kicad_pcb

Error Signal PCB layout, top view — open source board by QSUM-UNB

About the Error Signal PCB

Error Signal is an open source PCB design by QSUM-UNB, published on GitHub. It is a 4-layer board measuring 30 × 30 mm, with 25 components from 11 distinct parts.

Other key parts include the REF02HSA+ and OPA2172. By type, the board carries 9 resistors, 8 capacitors, 4 connectors, 2 ICs and 2 inductors.

From the project

PCB designs for a standalone optical frequency-offset locking system.

- © 2026 by K. Shalaby, P. Trottier, T. Reuschel, and B. Barrett - PCB designs licensed under CC BY-NC-SA 4.0

- This repository contains the PCB designs for a standalone optical frequency-offset locking system. All PCB designs were developed in KiCAD. - Files for each circuit component (or tile) are organized into the directory structure described below. - Details about the locking system and its performance can be found in our publication: - K. Shalaby et al, Standalone optical frequency-offset locking electronics for atomic physics, Rev. Sci. Instrum. 97, 033004 (2026). Pre-print…

Error Signal, from the project README
From the project README

Main components on the Error Signal

REF02HSA+OPA2172

Error Signal bill of materials (BOM)

25 components, 11 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
REF02HSA+
IC1
1
OPA2172
U1
1
Input Power
J1
3
142-1701-626‎
J3, J4, J7
2
MMZ2012Y202BTD25
FB1, FB2
2
10NF
10nF
C1, C3
2
1UF
1uF
C2, C4
2
1UF
1uF
C5, C6
2
100NF
100nF
C7, C8
8
1k
R1, R2, R3, R4, R5, R6, R7, R8
1
3k
R9

Error Signal design files

The KiCad project lives in the QSUM-UNB/Frequency-Offset-Lock repository on GitHub; these links point at the commit this page was built from.

Error Signal: common questions

How big is the Error Signal PCB?

The Error Signal measures 30 × 30 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Error Signal?

25 components, from 11 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 Error Signal design files?

From the QSUM-UNB/Frequency-Offset-Lock 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 Error Signal design in my own project?

The repository has no license, so all rights stay with QSUM-UNB. Use it as a reference, and ask the author before reusing the design.

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