HardLabs

C3 epaper controller w/touch

martinberlin·bistable-smart-switch·Hardware/C3-27-epaper-touch/C3-27-epaper-touch.kicad_pcb

C3 epaper controller w/touch PCB layout, top view — open source ESP32 board by martinberlin

About the C3 epaper controller w/touch PCB

C3 epaper controller w/touch is an open source ESP32 PCB design by martinberlin, published on GitHub under the Apache-2.0 license. It is a 4-layer board measuring 70.2 × 71 mm, with 58 components from 39 distinct parts.

Its main chip is the C2934560, from the ESP32 family. Other key parts include the CP2102N-A02-GQFN28R, C39051 and C7440. By type, the board carries 21 capacitors, 17 resistors, 5 connectors, 5 diodes, 4 ICs and 3 transistors.

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

From the project

An epaper switch project with 2 PCBs, controller+touch, and 220AC to 3DC with Relay (Latch or solid-state)

IMPORTANT: This repository contains components added as github submodules. Please clone it using

git clone --recurse-submodules https://github.com/martinberlin/bistable-smart-switch.git or if you already cloned it without them just run additionally: git submodule update --init --recursive

This is a project that started with the idea to use small, and inexpensive, SPI epapers with touch. The ones that I've found available and met that criteria are produced by Good-Display in Dalian. The idea is very simple:

C3 epaper controller w/touch, from the project README
From the project README

Main components on the C3 epaper controller w/touch

C2934560CP2102N-A02-GQFN28RC39051C7440

C3 epaper controller w/touch bill of materials (BOM)

58 components, 39 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C2934560
ESP32-C3-WROOM-02-N4
U1
1
CP2102N-A02-GQFN28R
U2
1
C39051
RT9013-33GB
U3
1
C7440
PCF8563T
U4
1
C469327
Si1308
Q1
2
C146798
BC817
Q2, Q3
1
C32346
Crystal_Small
Y1
1
C262292
AFC24-S24FIC-00
J1
1
C165948
USB_C_Programming
J2
1
Conn_01x06
J3
1
C224194
Conn_01x06_Female
J4
1
Groove sensor
J5
1
C2911519
RESE
JP1
3
C77336
MBR0530
D1, D2, D3
1
C191023
1N5819WS
D4
1
SP0503BAHTG
D5
1
C38117
10uH
L1
7
C1779
4.7uF
C1, C2, C3, C7, C9, C10, C19
4
C28323
1uF
C4, C5, C6, C8
1
C1779
4.7uF 50V
C11
Show 19 more
QtyPartRefs
1
C19666
4.7uF
C12
1
C1779
4.7uF
C13
2
C15850
10uF
C14, C15
1
C129289
C_Polarized 100uF
C16
2
C122252
220uF
C17, C18
2
C38523
12 pF
C20, C21
1
C25804
10K
R1
3
C25804
10 K
R2, R4, R5
1
C25237
3R
R3
2
C23186
5.1K
R6, R7
2
C23162
4.7K
R8, R9
1
C22980
3.6K
R10
1
C103895
0.47R
R11
1
C25804
4.7K
R12
1
C21190
1K
R13
1
C31850
22K
R14
1
C137715
47K
R15
1
22Ω
R16
1
47K
R17

C3 epaper controller w/touch design files

The KiCad project lives in the martinberlin/bistable-smart-switch repository on GitHub; these links point at the commit this page was built from.

C3 epaper controller w/touch: common questions

What microcontroller does the C3 epaper controller w/touch use?

The C3 epaper controller w/touch is built around the C2934560, from the ESP32 family.

How big is the C3 epaper controller w/touch PCB?

The C3 epaper controller w/touch measures 70.2 × 71 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the C3 epaper controller w/touch?

58 components, from 39 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 C3 epaper controller w/touch design files?

From the martinberlin/bistable-smart-switch repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the C3 epaper controller w/touch design in my own project?

Yes, under the terms of its Apache-2.0 license, which martinberlin chose for the repository.

Can I test firmware for the C3 epaper controller w/touch 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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