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416 points stacktrust | 3 comments | 12 Oct 23 16:31 UTC | HN request time: 0.629s | source
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p1mrx ◴[12 Oct 23 17:17 UTC] No.37860049[source]▶
My house came with the doorbell wires buried behind the frame somewhere, so I installed a self-powered wireless doorbell. The transmitter harvests power from the user physically pressing the button, so it doesn't need batteries. I just caulked it straight onto the brick.
replies(1): >>37860237 #
1. aaronharder ◴[12 Oct 23 17:32 UTC] No.37860237[source]▶
Do you have a link to that doorbell product? My house came with the same problem.
replies(1): >>37860691 #
2. p1mrx ◴[12 Oct 23 18:05 UTC] No.37860691[source]▶
https://tecknet.com/collections/wireless-doorbell/products/s...

I removed the TECKNET logo with isopropyl alcohol.

The receiver has dozens of tunes, but the only one worth using is the Westminster Chime Melody. There's also a "ding-dong ding-dong", but it's annoying that it plays twice. The rest are just too long; it's a doorbell, not a jukebox.

The receiver remembers the tune and volume if power is interrupted, so that extra cruft doesn't matter after initial setup.

replies(1): >>37861774 #
3. 4star3star ◴[12 Oct 23 19:17 UTC] No.37861774[source]▶
I love this! Sometimes I daydream about a device that works kind of like an old printing press. You can arrange letter tiles to create a message. Then, you power the thing by pumping a lever or something, and it constructs a digital signal from the letters and sends it over something like LoRaWAN.