Several months ago, an idea popped into my head for a fun project. I wondered if I could burn some characters into the yellow paint of a No. 2 pencil with one of those powerful diode lasers available on eBay. Perhaps it could be my name or my grandkid’s names, or even a happy birthday message to my lovely wife. Here’s how I did it.
This project is a follow-on from my MIDI lyre project featured in the July-August magazine. I’m going to describe how to build a MIDI autoharp. Like the lyre, this is a MIDI controller, so it doesn’t make any sounds itself. Instead, it sends MIDI messages to an external synthesizer. It’s the synthesizer that makes the sounds.
When you think of MIDI controllers, you probably think of a keyboard. However, there are many reasons to have MIDI controllers in other form factors (guitars, saxophones, flute/clarinets, and even trumpets for example), not the least of which is fun! In this article, we will make a MIDI lyre version. Also, the techniques presented here will allow you to create your own touch sensitive MIDI controllers in any form factor you can imagine.
Turn an Arduino Due and a leftover analog oscilloscope into a high resolution computer graphics display and gain valuable insights into computer graphics, digital-to-analog conversion (ADC), and advanced Direct Memory Access (DMA) hardware and software techniques.
The “magic” of Proportional Integral Derivative (PID) process control can be mystifying. In this article, we’ll step you through using an Arduino in a hands-on exercise using a solid-state relay to control a 1,500 watt hotplate in a real world solution to a tricky problem: automating a vegetable canning process.
It’s not all that often that a new piece of hardware comes along that immediately captures the attention of the builder community. The ESP8266 is the newest example of this. It’s only about the size of a nickel, yet contains a powerful 32-bit microcontroller and a Wi-Fi interface, plus you can buy it for around $4.