I’m a keen maker and love to solve my daily problems with homemade solutions. If you have kids, you’ll know how frustrating it can be to be woken up at 5 am when you need to sleep. To combat this, I devised a simple colour system to let them know when they were allowed to get out of bed in the morning. When the lights are red, it’s time for bed!
The colours are displayed on this pair of smart nightlights, made using cheap LED strips and ESP8266 WiFi-enabled microcontrollers (parts cost less than £5 per light!).