Solar Soil Sensor Clearance Build your own solar-powered electronic

Build your own solar-powered electronic dice

enclosure design files and instructions is here:

Here is a short video of a single and three of the units in action:

USB power socket

The LEDs are ‘charlieplexed’ which is an interesting way of running lots of LEDs from a small number of micro-controller pins

Solar Soil Sensor Clearance Build your own solar-powered electronicAdd this soil moisture sensor to your indoor potted plants to let you know when to water them. This checks the moisture level and either blinks an LED or 'chirps' to remind you to water the plant. It is solar powered, so will never need batteries! It uses an ultra capacitor to store the solar energy, so will work even if left uncharged for a long time. But it will need to be left in sun to recharge on a sunny windowsill will work perfectly! You can