Uploaded April 2021 | Updated September 2026, 2 weeks ago

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In this video we upgrade a basic doorbell to send notifications over WiFi. With some power harvesting no battery is required. An optional Node-RED server translates the signal and activates a visual notification remotely. This not only helps if the bell isn't audible but can also be use for hearing disabled people.

Code and Noder-RED flow can be found here:
github.com/bitluni/Doorbell

Links to parts and tools (affiliate links):
ESP8266 D1 Mini ($3.50): aliexpress.bitluni.net/d1mini
Flexible RGB LED Matrix ($12.20): aliexpress.bitluni.net/flexRGB
AC to DC PSU with Barrel Jack: aliexpress.bitluni.net/ACtoDCBarrel
Small DC-DC Converter: aliexpress.bitluni.net/smallDC2DC
Electrolytic Capacitors: aliexpress.bitluni.net/elco
Zener Diode Set ($4): aliexpress.bitluni.net/zener
Full Bridge Rectifiers: aliexpress.bitluni.net/fbr

LED Projector ($72): aliexpress.bitluni.net/projector

My camera and lens (4k 60fps):
amazon.bitluni.net/gh5
Zoom H6 Audio Recorder:
amazon.bitluni.net/h6

plz share :-)

Tindie store: tindie.com/stores/bitluni
Github Sponsors: github.com/sponsors/bitluni
Patreon: patreon.com/bitluni
Channel membership: youtube.com/channel/UCp_5PO66faM4dBFbFFBdPSQ/join
Paypal: paypal.me/bitluni
Dogecoin: DLhdK867hZCvuPqmpgviZqgfvUTdSiRfoU
bitclout: bitclout.com/u/bitluni

Twitter: @bitluni
reddit: u/bitluni
Discord: discord.gg/MT5RbJt

Music:
Jeremy Blake - Powerup!
Wayne Jones - Brain Trust
Quincas Moreira - Sparse Clouds

#electronics #maker #iot