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Mrtracker board dev v1

nik0sc·mrtracker-board-dev_v1

Mrtracker board dev v1 layout, top view — open source ESP32 board by nik0sc

About the Mrtracker board dev v1

Mrtracker board dev v1 is an open source ESP32 PCB design by nik0sc, published on GitHub. It is a 2-layer board measuring 450 × 120 mm, with 289 components from 19 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the LM1117-3.3 and TM1638. By type, the board carries 242 diodes, 20 resistors, 11 capacitors, 5 ICs, 5 transistors and 4 connectors.

It belongs with the wearables designs in this gallery.

From the project

MRTracker PCB design

This is the KiCAD schematic and board layout of MRTracker. BOM and centroid (pick and place) files are in the assembly directory.

MRTracker is a physical map of the MRT that tracks the location of trains in near real-time. It is a PCB with an array of LEDs on them and an ESP32 that gets the real-time location of trains. An LED will be lit for every train currently on the network. Currently the North-South and East-West lines are supported.

Mrtracker board dev v1, from the project README
From the project README

Main components on the Mrtracker board dev v1

ESP32-WROOM-32LM1117-3.3TM1638

Mrtracker board dev v1 bill of materials (BOM)

289 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-WROOM-32
U1
1
LM1117-3.3
U2
3
TM1638
U3, U4, U5
5
C8545
Q_NMOS_GSD
Q1, Q2, Q3, Q4, Q5
1
SERIAL
J1
1
C404969
USB_B_Micro
J2
1
5V
J3
1
LED_SPI_3.3
J4
1
0-10k
RV1
1
C318884
BOOT/RST
SW1
105
C375444
RED
D1, D3, D4, D5, D6, D7, D8, D9 +97
137
C72043
GREEN
D2, D83, D84, D85, D86, D87, D88, D89 +129
3
10UF
10uF
C1, C4, C5
4
0.1UF
0.1uF
C2, C7, C9, C11
1
1UF
1uF
C3
3
100UF
100uF
C6, C8, C10
13
10K
10k
R1, R2, R3, R4, R5, R6, R7, R8 +5
2
1k
R11, R12
5
47
R16, R17, R18, R19, R20

Mrtracker board dev v1 design files

The KiCad project lives in the nik0sc/mrtracker-board-dev_v1 repository on GitHub; these links point at the commit this page was built from.

Mrtracker board dev v1: common questions

What microcontroller does the Mrtracker board dev v1 use?

The Mrtracker board dev v1 is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the Mrtracker board dev v1?

The Mrtracker board dev v1 measures 450 × 120 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mrtracker board dev v1?

289 components, from 19 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 Mrtracker board dev v1 design files?

From the nik0sc/mrtracker-board-dev_v1 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Mrtracker board dev v1 design in my own project?

The repository has no license, so all rights stay with nik0sc. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Mrtracker board dev v1 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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