LP Filter
About the LP Filter PCB
LP Filter is an open source PCB design by QSUM-UNB, published on GitHub. It is a 4-layer board measuring 30 × 30 mm, with 17 components from 10 distinct parts.
Other key parts include the TL082CDT. By type, the board carries 8 capacitors, 3 connectors, 3 resistors, 2 inductors and 1 IC.
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…
Main components on the LP Filter
LP Filter bill of materials (BOM)
17 components, 10 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL082CDT | SO-8_3.9x4.9mm_P1.27mm | U1 |
| 2 | 142-1701-626 | SMA-Edge-Generic | J1, J2 |
| 1 | Input Power | Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J3 |
| 2 | MMZ2012Y202BTD25 | L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | FB1, FB2 |
| 2 | 2NF 2nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2 |
| 2 | 1UF 1uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C8 |
| 2 | 100NF 100nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4, C7 |
| 2 | 1UF 1uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C5, C6 |
| 2 | 10K 10k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 1 | 50 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3 |
LP Filter 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.
LP Filter: common questions
How big is the LP Filter PCB?
The LP Filter measures 30 × 30 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the LP Filter?
17 components, from 10 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 LP Filter 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 LP Filter 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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