re3Dev/Extrusion-Metrology1PCB with a main purpose of a low-cost, dedicated 1D metrology sensor specifically for a Klipper printer, use controlled illumination to get a high-resolution bead cross-section without running full machine vision, and automate calibration using the printer's existing motion system.
Line Sensor Board is an open-source printed circuit board by re3Dev, from the re3Dev/Extrusion-Metrology repository on GitHub. It is a 2-layer board of 60.5 × 85.5 mm with 31 parts on 58 nets, routed with 257 tracks and 56 vias.
It is built around the MCP6022-I/P, 74HC04D and PN2222A. Its parts include 7 capacitors, 7 resistors, 4 diodes, 3 ICs and 1 transistor. It belongs with the sensors and measurement boards and the RP2040 boards of this library.
Copyright © 2026 Mitchell Mashburn All rights reserved. Source files are made publicly available for review, education, and evaluation. No permission is granted for commercial manufacture, redistribution, or derivative works without written authorization.
PCB with a main purpose of a low-cost, dedicated 1D metrology sensor specifically for a Klipper printer, use controlled illumination to get a high-resolution bead cross-section without running full machine vision, and automate calibration using the printer's existing motion system.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2, C4, C5, C6 |
| 4 | 150R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3, R4, R5 |
| 4 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4 |
| 1 | 10 µF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C7 |
| 1 | 100R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 1 | 10µF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C3 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 1nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1 |
| 1 | 74HC04 | Package_DIP:DIP-14_W7.62mm | U2 |
| 1 | MCP6022 | Package_DIP:DIP-8_W7.62mm | U1 |
| 1 | PN2222A | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_SMD_HandSolder | A1 |
| 1 | ~ | LineSensor:TCD1103GFG_HandSolder | U4 |
The 23 most common of 31 parts.
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COmpliant RObot COntroller is a free software project aiming to create an impedance controller based on a stm32 microcontroller using bldc motors and strain gauges.
It measures 60.5 × 85.5 mm and has 2 copper layers, 1.6 mm thick.
31 parts, built around the MCP6022-I/P, 74HC04D and PN2222A. 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.
From the re3Dev/Extrusion-Metrology repository on GitHub, at the commit this page was made from: the board is Line-Sensor-Board.kicad_pcb and its schematic Line-Sensor-Board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask re3Dev before reusing the design.