ANSI Y32.2-1975, CSA Z99-1975, IEEE Std 315-1975 are standards for Graphic Symbols for Electrical and Electronics Diagrams. It defines Ref Des as well. Veronika Anderson C.I.D | Sr. Electrical/Mechanical Design Engineer | Excelitas Technologies Office: +1 626.967.9521 x 236 1330 East Cypress Street, Covina, CA 91724 USA [log in to unmask] www.excelitas.com -----Original Message----- From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of David Baldwin Sent: Thursday, August 01, 2013 9:03 AM To: [log in to unmask] Subject: Re: [DC] Informal Poll DS. Below is the standard list that I use from PCB Libraries. A Assembly K Relay AR Amplifier L Coil; Inductor AT Attenuator; Isolator LS Loud Speaker/Buzzer B Blower M Motor BR Bridge Rectifier MG Motor Generator BT Battery MH Mounting Hole C Capacitor MK Microphone CB Circuit Breaker MP Mechanical Part CN Capacitor Network P Plug Type Connector CP Coupler PS Power Supply CR Silicon Rectifier Q Transistor D Diode; Thyristor; Varacter R Resistor DC Directional Coupler RN Resistor Network DP Diplexer RT Thermistor DL Delay Line S Switch DS Display; LED Lamp T Transformer E Terminal TB Terminal Block F Fuse TC Thermocouple FB Ferrite Bead TP Test Point FD Fiducial U Tuner FL Filter U Integrated Circuit G Generator V Electron Tube HW Hardware VR Voltage Regulator HY Circulator W Cable Transmission I or ICT In Circuit Test Point X Sub-circuit J Jack Connector Y Crystal or Oscillator JP Configuration Jumper Z Ref Des Suppressed At 08:34 AM 8/1/2013, Jack Olson wrote: >Just out of curiosity, what Reference Designator (or "Class Designation >Letter", for you purists!) are you using for an *LED*? > > >______________________________________________________________________ >This email has been scanned by the Symantec Email Security.cloud service. >For more information please contact helpdesk at x2960 or >[log in to unmask] >______________________________________________________________________ > >----------------------------------------------------------------------- >---------- DesignerCouncil Mail List provided as a free service by IPC >using LISTSERV 16.0. >To unsubscribe, send a message to [log in to unmask] with following text >in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. >To temporarily stop/(restart) delivery of DesignerCouncil send: SET >DesignerCouncil NOMAIL/(MAIL) For additional information, or contact >Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 >----------------------------------------------------------------------- >---------- Via Circuits Inc. http://www.viacircuits.com (480) 892-9920 ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 16.0. To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 --------------------------------------------------------------------------------- ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 16.0. To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ---------------------------------------------------------------------------------