The main circuit uses an optoisolator and a logic converter to get the job done. The MIDI signals are converted from the standard 5V logic to 3.3V in order to work with the XBEE.

Trading on the New York Stock Exchange was halted briefly Monday morning when the S&P 500 index fell 7%. Here's how these automatic circuit breakers work.

Digi XBee 3 Global Cellular Cat 1 Designed for applications that require higher throughput, the XBee 3 Cat 1 smart modem gives customers a single SKU for deployment of cellular products anywhere ...