Enclosure and injection mold design is similar to PCB design … it’s full of pitfalls and obstacles, and you learn by making mistakes. The difference between PCB design and design an injection mold, though, is unfortunately about $50 versus $5000 or more! Better to do some solid research before trying your first mold out! Some of the easier to avoid pitfalls (avoid sharp corners, ensure constant wall thickness, choosing the wall thickness based on the material being used, etc.) are described here in Plastics Part Design and Moldability. Have any experience (positive or negative) having molds made yourself or a pointer to good sources of information on mold design? Post them up in the comments!
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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