Simple or Sophisticated? Teardown of a Cell Phone SIM Card is Revealing!
Great teardown video below by electronupdate of a good ol’ SIM card – you and I likely have one if not more of these in our pockets right this very second! Electronupdate does a great review doing a side-by-side of block diagrams matched up to the layout of the SIM, and also some interesting tidbits on attacks – and therefore protections in the hardware design – against intrusion common to cellphones. Watch the video below for more!
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.