Converting a $3.88 analog clock from Walmart into a ESP8266-based Wi-Fi clock (github.com)

Article summary

The article describes a project that converts a $3.88 analog clock from Walmart into a Wi-Fi clock using an ESP8266 module and an Arduino sketch. The clock connects to a Network Time Protocol (NTP) server to automatically retrieve and display the local time, and it also automatically adjusts for daylight savings time. The project uses a Microchip 47L04 Serial EERAM to store the clock's hand positions, allowing it to remember the time even after a power interruption. The clock's quartz movement is modified to be controlled by the ESP8266 module.

Main themes

• ESP8266 projects
• Analog clock modification
• Wi-Fi clock
• NTP server
• Microchip 47L04 Serial EERAM
• Arduino sketch

What commenters say

• Some commenters discuss the limitations and inaccuracies of self-setting clocks that do not use radio signals to synchronize with atomic clocks.
• Others mention the existence of radio-controlled clocks that use signals from stations around the world to set their time accurately.
• There is a debate about the cost-effectiveness of using Wi-Fi versus other methods, such as NFC or Bluetooth, to synchronize the clock's time.
• Some commenters express interest in using alternative technologies, such as FRAM or MRAM, for non-volatile memory in similar projects.
• The discussion also touches on the issue of counterfeit or low-quality parts being sold online, and the importance of verifying the authenticity of components.
• Some commenters share their own experiences with similar projects, including using different types of memory or synchronization methods.
• There is a disagreement about the feasibility of using certain methods, such as supercapacitors and voltage dividers, to store data during power interruptions.
• The conversation also involves a discussion about the economics of online shopping, including the costs of shipping and the impact of tariffs on international trade.