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2 layers40.4 × 20.8 mmME3-H2, the printed circuit board in 3D

PCB stuff that doesn't belong to any specific robot

Size
40.4 × 20.8 mm
Copper layers
2
Thickness
1.6 mm
Parts
25
Nets
17
Pads
67
Tracks, vias
159, 7
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
19 Sep 2025
Updated
2 Nov 2026

Overview

ME3-H2 is an open-source printed circuit board by uf-mil-electrical, from the uf-mil-electrical/misc_hardware repository on GitHub. It is a 2-layer board of 40.4 × 20.8 mm with 25 parts on 17 nets, routed with 159 tracks and 7 vias.

It is built around the LM27761DSG. Its parts include 9 capacitors, 9 resistors, 4 ICs, 1 transistor and 1 connector.

Main components

1

README

README.md

misc_hardware

PCB stuff that doesn't belong to any specific robot

Projects by type:

Communication

  • [Peter Feng] MCP2515 CAN Bus Module Testing

LEDs

  • [Erik Neff-Flahan] 8x8 Neopixel Matrix V1
  • [Russell MacGregor] 8x8 Neopixel Matrix V2
  • [Russell MacGregor] Neopixel Breakout Board
  • [Erik Neff-Flahan] Neopixel RP2350 C Library

Logic

  • [Russell MacGregor] Level Shifter Breakout V1

Navigation

  • [Russell MacGregor] IMU Test Board V1 (incomplete)

Power

  • [Russell MacGregor] 3V3 1.5A Regulator Breakout
  • [Russell MacGregor] Battery ORing Test Board V1
  • [Erik Neff-Flahan] RobotX Buoy Board Power Setup
  • [Russell MacGregor] Inductor Breakout V1
  • [Russell MacGregor] MAX20408 Breakout V1
  • [Russell MacGregor] TPS26631 E-Fuse Breakout V1

RobotX2026

  • [Aiden Shepler] Task 2 Props (underwater LEDs)

Sensing

  • [Russell MacGregor] Air Quality Monitor V1
  • [Russell MacGregor] Atmospheric Monitor V1
  • [Russell MacGregor] Door Sensor V3

USB

  • [Russell MacGregor] USB 2.0 Hub Breakout V4

Parts

25
QtyValueFootprintReferences
40.1uFCapacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolderC1, C4, C8, C9
410kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR2, R3, R7, R8
34.7uFCapacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolderC2, C3, C6
2LT6003HS5TRPBFLT6003:LT-S5-5-TSOT-23_NU1, U2
1-5VTestPoint:TestPoint_Pad_D2.0mmTP1
1100kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR6
1158kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR1
11uFCapacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolderC5
12.2uFCapacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolderC7
130kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR5
147Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR4
151kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR9
1Conn_01x03_PinConnector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_VerticalJ1
1LM27761Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mmU4
1ME3-H2ME3-H2:ME3-H2U3
1PJFETPackage_TO_SOT_THT:TO-92Q1

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Questions

How big is the ME3-H2 PCB?

It measures 40.4 × 20.8 mm and has 2 copper layers, 1.6 mm thick.

What parts does the ME3-H2 use?

25 parts, built around the LM27761DSG. 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 ME3-H2 KiCad files?

From the uf-mil-electrical/misc_hardware repository on GitHub, at the commit this page was made from: the board is Sensing/Sensor_Breakouts/ME3-H2_breakout/ME3-H2.kicad_pcb and its schematic Sensing/Sensor_Breakouts/ME2-CH2O-16×15_breakout/ME2-CH2O-16×15_breakout.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the ME3-H2 design in my own project?

Its repository states no licence, so its author keeps all rights: ask uf-mil-electrical before reusing the design.