login
by Jan Buiting @ elektormagazine.com:
Even in the Internet & Wi-Fi age where it seems irrelevant just where you are at a specific time, it’s sometime useful to know if a visitor called at your door while you were out. Who knows, it might be the DHL man with a delivery of essential components!
The little circuit described in this article can reassure you that you haven’t missed the postman’s call irrespective of whether he always rings once or twice. It’s cheap and can probably be built from parts in your junkbox.
Doorbell Memory – [Link]
Please follow and like us:
RELATED POSTS
8 June, 2018 Orange Pi 3G IoT Board- A Cost Effective IoT Hacker Board
4 November, 2024 ESP32-C61-DevKitC-1 development board comes with Wi-Fi 6/Bluetooth LE 5
10 December, 2016 How to use an RGB LED with Arduino
5 May, 2022 Maxim Integrated MAX98361 Plug-and-Play Digital Class-D Amplifiers
23 June, 2017 Micropower, Rail-to-Rail, 300kHz Op Amp with Shutdown in tiny package
26 October, 2018 An i.MX 8M Development Kit for Amazon Alexa Voice Service
i think your post is very helpful for me..
any body can create door bell..
just flow this video.
https://youtu.be/mLUoECdI3-8