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Wf26

gunnarbeutner·doorbell·wf26/wf26.kicad_pcb

Wf26 PCB layout, top view — open source board by gunnarbeutner

About the Wf26 PCB

Wf26 is an open source PCB design by gunnarbeutner, published on GitHub under the MIT license. It is a 2-layer board measuring 64 × 59 mm, with 7 components from 7 distinct parts.

By type, the board carries 2 switches, 1 connector, 1 speaker, 1 capacitor and 1 resistor.

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

From the project

A drop-in smart replacement for a WF26 handset on an STR Elektronik TV20/S apartment-intercom bus, built on an ESP32-S3 running ESPHome. To the building it looks like the handset it replaces; to Home Assistant it looks like a doorbell, an intercom and a door opener.

A drop-in smart replacement for a WF26 handset on an STR Elektronik TV20/S apartment-intercom bus, built on an ESP32-S3 running ESPHome. To the building it looks like the handset it replaces; to Home Assistant it looks like a doorbell, an intercom and a door opener.

- Ring detection — the front-door bell (Türruf) and the floor button (Etagenruf) are separate HA binary sensors and events: phone notifications, presence-aware automations, "someone rang while you were out" history. - Gong suppression — a solid-state switch in the chime path mutes the mechanical gong under firmware policy…

Wf26, from the project README
From the project README

Wf26 bill of materials (BOM)

7 components, 7 distinct parts.

QtyPartRefs
1
WF26 -> TV20 S bus
J1
1
Speaker/Mic 16R
LS1
1
Tueroeffner (door release)
S1
1
Sprechen/Hoeren (talk)
S2
1
HJR-4102-N-12V
WF26_K1
1
22uF/50V
C1
1
2.2k
R1

Wf26 design files

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

Wf26: common questions

How big is the Wf26 PCB?

The Wf26 measures 64 × 59 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Wf26?

7 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Wf26 design files?

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

Can I use the Wf26 design in my own project?

Yes, under the terms of its MIT license, which gunnarbeutner chose for the repository.

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