HardLabs

TwinBusExpander

Qeteshpony·TwinBusExpander·pcb/TwinBusExpander.kicad_pcb

TwinBusExpander PCB layout, top view — open source ESP32 board by Qeteshpony

About the TwinBusExpander PCB

TwinBusExpander is an open source ESP32 PCB design by Qeteshpony, published on GitHub under the BSD-2-Clause license. It is a 4-layer board measuring 30 × 36.5 mm, with 24 components from 18 distinct parts.

Its main chip is the ESP32-C6-WROOM-1, from the ESP32 family. Other key parts include the LTV-817S and AMS1117-3.3. By type, the board carries 10 resistors, 5 capacitors, 4 ICs, 2 connectors, 2 switches and 1 diode.

It belongs with the iot & wireless designs in this gallery.

From the project

WiFi Module for TwinBus Intercom and ESPHome

TwinBusExpander, from the project README
From the project README

Main components on the TwinBusExpander

LTV-817SAMS1117-3.3ESP32-C6-WROOM-1

TwinBusExpander bill of materials (BOM)

24 components, 18 distinct parts.

QtyPartRefs
2
LTV-817S
U1, U2
1
AMS1117-3.3
U3
1
ESP32-C6-WROOM-1
U4
1
USB_C_Receptacle_USB2.0_16P
J1
1
Twinbus 7630
J2
1
Reset
SW1
1
Boot
SW2
1
LED
D1
2
10u
C1, C2
1
1u
C3
1
4u7
C4
1
100n
C5
2
1k
R1, R10
2
5k1
R2, R3
1
100k
R4
1
220R
R5
2
10k
R6, R7
2
33R
R8, R9

TwinBusExpander design files

The KiCad project lives in the Qeteshpony/TwinBusExpander repository on GitHub; these links point at the commit this page was built from.

TwinBusExpander: common questions

What microcontroller does the TwinBusExpander use?

The TwinBusExpander is built around the ESP32-C6-WROOM-1, from the ESP32 family.

How big is the TwinBusExpander PCB?

The TwinBusExpander measures 30 × 36.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the TwinBusExpander?

24 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the TwinBusExpander design files?

From the Qeteshpony/TwinBusExpander repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the TwinBusExpander design in my own project?

Yes, under the terms of its BSD-2-Clause license, which Qeteshpony chose for the repository.

Can I test firmware for the TwinBusExpander 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.

Similar boards