Outer Dimensions Component Length (in)Width (in)Height (in)Inch cube Main Case Component Diam (in)Height (in)Inch cube Side Case (1 of 3) Components Inch cube Total Volume: 11.16

Weight of Components ComponentsWeight (oz) PCB0.5 Reader0.441 Keypad0.25 Magnetometer0.028 Battery0.770 Side Motor0.229 Side Motor0.229 Side Motor0.229 Case Total1.55 TOTAL:4.23

Heat Analysis – Hand Calculations  Conduction caused by air:  Section of chip 0.1” x 0.1”  A=6.45*10 -6 m 2  Q= -KA (dT/dx)  Q Total =1.6W  Q Part =1.6W/210 = W  K= (about) Wm -1 K -1  dT/dx = Q/(-KA)  dT/dx = /(0.0257*6.45*10 -6 ) = degC/m =649 degF/in =64.9 degF/0.1in Not conclusive, but a good representation that air acts as an insulator Chip Air

Heat – Experimental Results RFID Reader connected to power in case until it reaches steady state Antenna run on full power for 20 minutes Chip temperature reached about 128 deg F Ambient inside case temp reached about 116 deg F

Heat – Analytical Analysis Case thermal conductivity = 0.2 Wm -1 K -1 Outside case temp set to 20 deg F Top of chip set to 130 deg F Bottom of chip insulated