In B is for Battery, Lady Ada showed us how to make lemon batteries and why it works. Alternately, though, any citrus fruit can work. This 14-hour exposure by Caleb Charland shows the light generated by a single LED inserted inside an orange. The chemical reaction between the nails and the citrus fruit surrounding them powers the warm glow of the photo. via petapixel.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Sorry, the comment form is closed at this time.