Do you own an #oscilloscope and want to know what the #waveforms mean? Check out graham https://t.co/eMLWrzXJYL for more info. #diagnostics http://pic.twitter.com/h2OE7pxZHl
— Graham Stoakes MIMI (@gstoakes) December 18, 2017
http://twitter.com/gstoakes/status/942690429736247296 by gstoakes