Due to my background in control systems, I find feedback loops in everything. This approach has served me well. Feedback is the most useful and important tool in engineering. Every system that you encounter as an engineer — every system that you use, design, buy, or fix — uses feedback in some form, either intentionally or unintentionally, either explicitly or implicitly. Understanding a little feedback theory is key to understanding the things that you can do to create, build, repair, and improve systems that exploit feedback. One of my colleagues once said that “feedback is so fundamentally important that analog engineers who don’t understand it should be legally barred from circuit design,” and I agree!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.