knock sensor (easy) ultraviolet pen with LED lights reading hidden messages LED Throwies Vibrating toy – rip apart an old toy and let it move LED Eyes in a robot – Cylon or KIT Light sensor and alarm for fridge or lunch box Joystick for Scratch game Lie detector – thermistator Room motion detector Check … Continue reading Some Quick Ideas
Copy and paste this URL into your WordPress site to embed
Copy and paste this code into your site to embed