HardLabs

Dev board

bt-trx·dev-board

Dev board layout, top view — open source ESP32 board by bt-trx

About the Dev board

Dev board is an open source ESP32 PCB design by bt-trx, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 78 × 68 mm, with 44 components from 32 distinct parts.

Its main chip is the ESP32-DEVKIT, from the ESP32 family. Other key parts include the SILabs_WT32i and LTV-816S. By type, the board carries 11 connectors, 9 resistors, 7 capacitors, 5 diodes, 3 ICs and 3 inductors.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

Hardware repo for the bt-trx development board

https://github.com/SchrodingersGat/KiBoM

"Tools" -> "Generate Bill of Materials" -> New Plugin

Eintragen der Bestellnummern ueber Properties des einzelnen Bauteils, oder gesammelt ueber "Tools"->"Edit Symbol Fields..."

Main components on the Dev board

SILabs_WT32iLTV-816SESP32-DEVKIT

Dev board bill of materials (BOM)

44 components, 32 distinct parts.

QtyPartRefs
1
SILabs_WT32i
U1
1
LTV-816S
U2
1
ESP32-DEVKIT
U3
1
RJ45
J1
1
PTT_BUTTON
J2
1
PTT_CON
J3
1
PTT_SEL
J5
2
I2C
J6, J8
1
Conn_01x02
J7
2
Conn_01x08
J9, J10
1
VOX_IN
J11
1
VOX_TRX
J12
1
Polyfuse 500mA
F1
2
5k
RV2, RV3
1
SW_Push
SW1
2
SM-LP-5001
T1, T2
1
LED AMBER 2mA
D1
1
1N5817
D2
1
TVS 16V
D3
1
LED BLUE 2mA
D4
Show 12 more
QtyPartRefs
1
LED GREEN 2mA
D5
2
100nH
L2, L3
1
47uH, 390mA
L4
2
1uF
C3, C4
2
15pF
C5, C6
1
220uF 25V
C7
2
100nF
C8, C9
3
10k
R1, R2, R9
1
2.2k
R3
2
820R
R4, R5
2
4.7k
R6, R7
1
220R
R8

Dev board design files

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

Dev board: common questions

What microcontroller does the Dev board use?

The Dev board is built around the ESP32-DEVKIT, from the ESP32 family.

How big is the Dev board?

The Dev board measures 78 × 68 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Dev board?

44 components, from 32 distinct parts. The full bill of materials is listed on this page.

Where can I download the Dev board design files?

From the bt-trx/dev-board repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Dev board design in my own project?

Yes, under the terms of its CERN-OHL-1.2 license, which bt-trx chose for the repository.

Can I test firmware for the Dev board 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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