As the development of the Mini Pinball kit progresses, Ben and Felix split their focus onto different areas of the build. Ben is finalizing the design of the flippers and how they're controlled. Solenoids are being used to give the power required to blast the metal ball up the table, and we don't want them to burn out! Thanks to a technique called Pulse-Width Modulation (PWM) from the Arduino software, we can make sure it's not powered all of the time. Felix isn't having a good time with the Teensy 3.6, after switching out the I2S audio circuit, we're now using a Digital to Analogue Converter (DAC) and the SDCard Arduino libraries are not being helpful in making the right noises. Do you have experience with SDCards and Arduino? What would you like to see in the mini pinball kit? Let us know on the element14 Community.