This page is archived material from a previous course. Please check for updated material.

Ring of IR (infrared emitter board)






Power:

• input power 10 to 16 Volts to P1    (can use 14.4 battery pack, or 15V from benchtop supplies), drawing 150 mA
• Use the molex-style 2-pin power connectors to power the modules (found at the front of the room).
• DO NOT REVERSE POWER TO THE BOARDS – this will damage the active components on the board.

Mechanical:

• 3” x 3” square.
• 4 – 40 mounting holes spaced 2.5″ apart from one another
• For this year’s competiton, board must be mounted 6″ above the surface and made level to the surface.
• IR LEDs are the same as on the grey IR emitter boards (HSDL-4220, datasheet in Downloads>> )

IR ouptut

• 1 kHz sine wave output
• Overall ouptut power is set by the two current-limiting resistors pushed into the board, currently using default values of 10 ohms.  This gives an output intensity approximately 50% light intensity of the grey IR emitter boxes at a distance of 30cm.  Please do not adjust the resistor values or remove these resistors for the duration of the course.




Accelerometer ouptut

• ADXL325 (see datasheet in Downloads>> )
• Does not need a separate input power line (powered from the 10-15V input line)