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ClearBell Ausseneinheit

akoerner-dev·ClearBell·archiv/V0.1/hardware/Ausseneinheit/ClearBell_Ausseneinheit.kicad_pcb

ClearBell Ausseneinheit PCB layout, top view — open source ESP32 board by akoerner-dev
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About the ClearBell Ausseneinheit PCB

ClearBell Ausseneinheit is an open source ESP32 PCB design by akoerner-dev, published on GitHub under the MIT license. It is a 2-layer board measuring 110 × 60 mm, with 45 components from 31 distinct parts.

Its main chip is the ESP32-WROOM-32E-N8, from the ESP32 family. Other key parts include the LMR33630ADDA and MAX98357AETE+T. By type, the board carries 3 ICs, 2 transistors, 1 connector, 1 diode and 1 inductor.

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

From the project

Selbst entwickeltes ESP32-Klingelsystem fuer ein Zweifamilienhaus - KiCad-Hardware und Arduino-Firmware (WLAN/UDP, HMAC-gesichert).

Selbst entwickeltes Türklingelsystem für ein Zweifamilienhaus — vollständig eigenentwickelt von der Schaltung über das PCB-Layout bis zur Firmware.

Eine Außeneinheit an der Haustür und zwei baugleiche Inneneinheiten (je eine pro Wohnung, EG/OG). Klingeln und Türöffnen laufen als quittierte, gegen Replay abgesicherte Transaktionen über WLAN/UDP.

- Funkstrecke real validiert statt angenommen. ESP-NOW war gesetzt und wurde nach systematischer RSSI-Messung an den echten Montageorten verworfen — die Direktstrecke war dort funktional tot. Ergebnis: Umstieg auf WLAN/UDP über den Router als besser…

ClearBell Ausseneinheit, from the project README
From the project README

Main components on the ClearBell Ausseneinheit

ESP32-WROOM-32E-N8LMR33630ADDAMAX98357AETE+T

ClearBell Ausseneinheit bill of materials (BOM)

45 components, 31 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-WROOM-32E-N8
IC1
1
LMR33630ADDA
U1
1
MAX98357AETE+T
MAX98357AETE_T
U2
1
PJA3415A_R1_00001
DMG2305UX-7
Q1
1
IRLML6344TRPBF
Q2
1
0475710001
475710001
J3
1
100u
C_Bulk1
4
100n
C_EN1, C_HF1, C_SD1, C_VDD_AMP2
1
10u
C_VDD_AMP1
2
100N
100n
Cboot1, CoutX1
1
DNP
Cff1
4
10U
10u
Cin1, Cin2, Cin3, Cin4
1
220N
220n
CinX1
2
22U
22u
Cout1, Cout2
1
1u
Cvcc1
1
BZX84C7V5
BZX84-C7V5
DZ1
1
1N4148W-E3-18
1N4148W
D_FLY1
1
Dooropener
J_DOOR1
1
WAGO_2086-1202
J_PWR1
1
Speaker1
J_SPK1
Show 11 more
QtyPartRefs
1
UART
J_UART1
3
10k
R_BOOT1, R_EN1, R_GPIO2
2
100
R_GATE1, R_RXD1
1
100k
R_GATE_PD1
2
1k
R_TOUCH_EG1, R_TOUCH_OG1
1
43K2
43k2
Rfbb1
3
100K
100k
Rfbt1, Rg1, Rpg1
1
PTS526SK15SMTR2 LFS
SW_BOOT1
S_BOOT1
1
PTS526SK15SMTR2 LFS
SW_RST
S_RST1
1
SMBJ15A-E3/52
SMBJ15A
D1
1
74438356018HT
4020HT_74438356018HT
Wurth Elektronik
L1

ClearBell Ausseneinheit design files

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

ClearBell Ausseneinheit: common questions

What microcontroller does the ClearBell Ausseneinheit use?

The ClearBell Ausseneinheit is built around the ESP32-WROOM-32E-N8, from the ESP32 family.

How big is the ClearBell Ausseneinheit PCB?

The ClearBell Ausseneinheit measures 110 × 60 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ClearBell Ausseneinheit?

45 components, from 31 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 ClearBell Ausseneinheit design files?

From the akoerner-dev/ClearBell 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 ClearBell Ausseneinheit design in my own project?

Yes, under the terms of its MIT license, which akoerner-dev chose for the repository.

Can I test firmware for the ClearBell Ausseneinheit 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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