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Common quartz watches have an error of 15-20 s/month. Hacksters might not be satisfied for their RTC. One solution is soft adjustment !
Bring a PCF8523 RTC to top accuracy
1.9K
Mechanical automatic watches have 2-3 days autonomy. Now ATtiny85 can keep them ready, whenever you want!
Automatic-watch WINDER with ATtiny85
1.0K
Small size code and simple hardware. Improved version now available.
Arduino Nano Clock with 4x64 LED Matrix (new version)
70K
The DigiSpark ATtiny85 can be connected to an 128x64 OLED and use easily readable, "huge" fonts (16x32 pixels WxH)!
Large Fonts on an 128x64 OLED for ATTiny85
8.8K
Using an ESP32 board and Nextion 2.4" (240x320) you can have accurate time and weather forecast from internet.
Atomic Clock and Weather with ESP32 and Nextion
18K
Your plant will have the needed water for months. Displayed: humidity and time since last pumped water! Cheap and only a few components!
ATtiny85 Plant Watering Autonomous System
13K
DigiSpark ATtiny85 I2C connected to a tiny OLED (128x32 pixels) can show easily readable, huge fonts (16x32 pixels WxH)!
Large Fonts for OLED 128x32 Driven by ATTiny85
11K