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DoorsignEPD

ahinrichs·DoorsignEPD-pcb

DoorsignEPD PCB layout, top view — open source ESP32 board by ahinrichs

About the DoorsignEPD PCB

DoorsignEPD is an open source ESP32 PCB design by ahinrichs, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 34.3 × 30 mm, with 10 components from 9 distinct parts.

Its main chip is the ESP-WROOM-32, from the ESP32 family. By type, the board carries 5 connectors, 2 switches, 2 resistors and 1 IC.

It belongs with the displays & leds, dev boards & breakouts and iot & wireless designs in this gallery.

From the project

ESP-WROOM-32 breakout board to connect it to a Waveshare E-Ink display

ESP-WROOM-32 breakout board to connect it to a Waveshare E-Ink display.

Inspired by article Ausdauernde Infotafel from German computer magazine c't. Example arduino and server software can be found here.

Input voltage is connected to a voltage regulator jack and directly to Pin6/IO34/ADC6 for monitoring. Hence input voltage must be below 3.6V. I use 2xAA together with a step up regulator. Additionally I connected a pad for Pin8/IO32/ADC4/TOUCH9. Haven't used it yet. Maybe for a touch wakeup or status LED.

DoorsignEPD, from the project README
From the project README

Main components on the DoorsignEPD

ESP-WROOM-32

DoorsignEPD bill of materials (BOM)

10 components, 9 distinct parts.

QtyPartRefs
1
ESP-WROOM-32
U1
1
PWR
J1
1
UReg
J2
1
DOut
J3
1
Serial
J4
1
IO32
J5
1
RESET
SW1
1
BOOT
SW2
2
10k
R1, R2

DoorsignEPD design files

The KiCad project lives in the ahinrichs/DoorsignEPD-pcb repository on GitHub; these links point at the commit this page was built from.

DoorsignEPD: common questions

What microcontroller does the DoorsignEPD use?

The DoorsignEPD is built around the ESP-WROOM-32, from the ESP32 family.

How big is the DoorsignEPD PCB?

The DoorsignEPD measures 34.3 × 30 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the DoorsignEPD?

10 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the DoorsignEPD design files?

From the ahinrichs/DoorsignEPD-pcb repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the DoorsignEPD design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which ahinrichs chose for the repository.

Can I test firmware for the DoorsignEPD 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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