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Another doorbell for the dog
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║ ─[ Another doorbell for the dog ]─ ║
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║ Release ....: Dog.Doorbell.v2.0.IDOSTUFF.PROPER ║
║ Title ......: Another doorbell for the dog ║
║ Date .......: 2026-09-27 ║
║ Supplier ...: shops, this time ║
║ Platform ...: Banana Pi M4 Zero / TS ║
║ Protection .: none, it's still a button on the wall ║
║ Parts ......: about 90 quid oops ║
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╠══════════════════════════▓▒░ RELEASE NOTES ░▒▓═══════════════════════════╣
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║ v1 was a bit of a hacked together mess. It works, but is basically a ║
║ USB webcam and bluetac. This is the PROPER attempt where I have bought ║
║ parts that fit together a little nicer. ║
║ ║
║ ■ a Banana Pi M4 Zero ║
║ ║
║ ■ an Arducam IMX378 camera ║
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║ ■ a PCM5102 I2S DAC into a PAM8403 amp and a 3W speaker ║
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║ ■ a nice rigid, hardy GPIO button, with a 3d printed enclosure, to ║
║ make the button a tad more suitable for the usecase ║
║ ║
║ ■ an IR LED ring ║
║ ║
║ The software is Node and TypeScript now. The camera keeps a four ║
║ second rolling buffer to ensure clips still start before the button ║
║ press. There's an option to send audio remotely to the speakers... ║
║ because I really can't stop myself from overengineering every project. ║
║ It does everything important with webhooks and mDNS on the local while ║
║ chatting to a backend on the cluster when needed. ║
║ ║
╠══════════════════════════▓▒░ INSTALL NOTES ░▒▓═══════════════════════════╣
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║ 1. Flash the image to a microSD card and boot the board. ║
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║ 2. Wire the button to a GPIO pin, the DAC to the I2S pins, the amp to ║
║ the DAC and the speaker to the amp. ║
║ ║
║ 3. Print the housing and the button enclosure. ║
║ ║
║ 4. Pair it with the backend, or keep it local, it'll work either way. ║
║ ║
╠══════════════════════════════▓▒░ GREETZ ░▒▓══════════════════════════════╣
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║ Dexamphetamine ║
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╠════════════════════════════▓▒░ GROUP NEWS ░▒▓════════════════════════════╣
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║ IDOSTUFF is looking for: strange hardware, invasive smart tech, cheap ║
║ boards with no documentation, more sources of chinese landfill tech. ║
║ Email us: hello@idostuff.uk. ║
║ ║
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║ -= idostuff.uk =- · nfo updated 2026-10-12 ║
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Photos
Coming soon.
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