Cutting tools and drill bits work best when run at the correct speed for the material being cut. Too fast or too slow can result in inefficient cutting, rough surfaces, heat buildup, premature dulling and/or tool breakage. But not all machines have feedback to tell you how fast they are running. The Pro Trinket Tachometer attaches to your machine to sense and display the actual rotation rate. It can be adapted to fit many common shop machines.
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, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, 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.
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