Short video shows how to put dried butterfly pea flowers into hot water to make it like litmus paper – it detects metal ions in water by changing color.
https://www.facebook.com/reel/1134297734201108?mibextid=zAoTV8&s=yWDuG2&fs=e
Electronics & Stuff, a lot about LEDs
Short video shows how to put dried butterfly pea flowers into hot water to make it like litmus paper – it detects metal ions in water by changing color.
https://www.facebook.com/reel/1134297734201108?mibextid=zAoTV8&s=yWDuG2&fs=e