Business Email: [email protected] Zone 7 Engineering, LLC is an electronics engineering company based in Portland Oregon USA created by seasoned engineer David Ashman. David is a senior level engineer with extensive experience in the design of digital & analog circuitry incorporating various microprocessors/DSPs, and development of embedded C/C++ firmware. Facebook: https://www.facebook.com/zone7engineering/ Linkedin: http://www.linkedin.com/in/zone7engineeringllc read full review »