What are volts?

Even if you know how to use electronic parts to make a circuit and measure volts with a meter, do you really know what volt is? Most people who build electronic devices don’t understand the fundamental basics behind this unit, and we were equally ignorant until we found this video from RimstarOrg that dwells deep into the very fundamental science of electricity. This is tricky stuff though, so don’t be surprised if you have to watch this video a couple of times before you get it, we sure had to.

What does your Arduino say?

Out of the many microcontrollers on the market, Arduino is the most popular and cherished one. It makes the task of controlling and programming your projects much easier than back in the day. But did you know that the Arduino is useful for much more than simple motor, light and sound control? In this video, RimstarOrg demonstrates how you can make your Arduino talk with speech synthesizer algorithms! Now your robots wont just look cool, they will sound cool as well. Perhaps you could even make it sing? Now that’s a challenge!

Making a photoresistor play music!

Photoresistors are very common electronic components that works like a normal resistor in total darkness, but as soon as light is hitting it, it changes. Increase the amount of light and the change will increase as well. This phenomenon is commonly used to detect when a light beam is broken, turning them into a light controlled switch. But did you know that they can also be used to make music? In this video Make: magazine walks us through a simple build that results in an electronic slide-whistle! Basically you transform light into music, and if you don’t think that is a cool idea, then what is?!

The incredible science of acoustic levitation

This is truly an revolutionary video! Did you know that objects can be levitated and moved around in mid air, using only sound? In this incredible video from Yoichi Ochiai (YouTube Channel 落合陽一) we see the first successful attempts to acoustically levitate small objects like styrofoam balls, water droplets, matches and even metallic nuts! Perhaps one day we can even levitate big objects like skateboards or cars? What would you like to levitate with this technology?