ArrayArray Arduino speed test | The Custom Geek The Custom Geek A place to share my inventions. Skip to content About Jeremy Arduino, Eagle, and Schematic Files Kits! FTDI EZ Flex Adapter – Build it! One Square Inch of Goodness – Build it! RGBW LED Controller – The Kit RGBW LED Controller – Build It. RGBW LED Controller – Use it! Store Cart Checkout Order Status Products Tag Archives: Arduino speed test Serial or Speed..