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ClearBell Inneneinheit

akoerner-dev·ClearBell·archiv/V0.1/hardware/Inneneinheit/ClearBell_Inneneinheit.kicad_pcb

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

ClearBell Inneneinheit is an open source ESP32 PCB design by akoerner-dev, published on GitHub under the MIT license. It is a 2-layer board measuring 98 × 60 mm, with 28 components from 19 distinct parts.

Its main chip is the ESP32-WROOM-32E-N8, from the ESP32 family. Other key parts include the TLV62568DBVR and MAX98357AETE+T. By type, the board carries 3 ICs, 3 connectors 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 Inneneinheit, from the project README
From the project README

Main components on the ClearBell Inneneinheit

TLV62568DBVRESP32-WROOM-32E-N8MAX98357AETE+T

ClearBell Inneneinheit bill of materials (BOM)

28 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TLV62568DBVR
U1
1
ESP32-WROOM-32E-N8
U2
1
MAX98357AETE+T
MAX98357AETE_T
U3
1
UJC-HP-3-SMT
UJC-HP-3-SMT-TR
J1
1
CONN_01X04
Conn_01x04
J2
1
0475710001
475710001
J3
1
100µ
C_Bulk1
5
100n
C_EN1, C_HF1, C_HF2, C_SD1, C_VDD2
1
4,7µ
C_IN1
2
10µ
C_OUT1, C_VDD1
1
Speaker1
J_SPK1
3
10k
R_BOOT1, R_EN1, R_GPIO2
2
5k1
R_CC1, R_CC2
1
100k
R_FBB1
1
470k
R_FBT1
1
100
R_RXD1
1
1k
R_TOUCH1
2
PTS526SK15SMTR2 LFS
SW_Push
S_BOOT1, S_RST1
1
SDER041H-2R2MS
2,2µ
L1

ClearBell Inneneinheit 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 Inneneinheit: common questions

What microcontroller does the ClearBell Inneneinheit use?

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

How big is the ClearBell Inneneinheit PCB?

The ClearBell Inneneinheit measures 98 × 60 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ClearBell Inneneinheit?

28 components, from 19 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 Inneneinheit 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 Inneneinheit 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 Inneneinheit 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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