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“My previous Instructable featured a 555 timer with a hex inverter used to generate a 40 kHz square wave and drive the ultrasonic transmitters. As you can see, the circuit is pretty large. I thought I could avoid using an …

“Floating things with sound might seem like science fiction or something you could only find in a physics lab, but actually many people have shown that its easy to diy. There are simple designs: www.instructables.com/id/Easy-Acoustic-Levitator/ www …

“In this project I will show you how a sensored BLDC Motor from an electric bike works and how we can create our own sensored ESC in order to let it rotate. Let’s get started!”