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/3UnYkhcPtH
— Graham Stoakes MIMI (@gstoakes) December 22, 2017
http://twitter.com/gstoakes/status/944139959472132096 by gstoakes