A DIY MP3 box with NFC ! In order to choose your your songs, you have to pass a NFC tag. 5 buttons in to pause, prev, next, lower/upper.
A digital thermometer built from scratch using Attiny85 and ds18b20 temperature sensor, which can run on a CR2032 over 130 days!
Use to record somebody's blow strength. Since without calibration it is relative value.
A thermostat with an OLED capable of plugging into a USB port.
DigiSpark ATtiny85 I2C connected to a tiny OLED (128x32 pixels) can show easily readable, huge fonts (16x32 pixels WxH)!
This is the 2nd tutorial on my ESP32 learning journey. Here, an OLED shows time and captured data by DHT sensor (temperature & humidity).
Application notes for Pmod OLED and Arduino Uno. In this app, a cloud of points is displayed randomly, then a flashing message will appear.