599 Menlo Drive, Suite 100 General: info parallax.com Rocklin, California 95765, USA Technical: support parallax.com Office: (916) 624-8333 Web Site: www.parallax.com Fax: (916) 624-8003 Educational: www.stampsinclass.com QTI Line Sensor ( 550-27401) Introduction The Parallax QTI senor uses a QRD1114 infrared (IR) reflective sensor to determine the reflectivity of the surface below it. When the QTI sensor is over a dark surface, the reflectivity is very low when the QTI is over a light surface, the reflectivity is very high and will cause a different reading from the sensor. Features Phototransistor Output No contact surface sensing Unfocused for sensing diffused surfaces Compact Package Daylight filter on sensor Specifications ABSOLUTE MAXIMUM RATINGS (TA=25c unless otherwise specified) Parameter Symbol Rating Units Operating Temperature -40 to +85 Celsius TOPR -40 to +85 Celsius Storage Temperature TSTG Celsius Lead Temperature (Solder Iron)(2,3) 240 for 5 sec TSOL-l Celsius Lead Temperature (Solder 260 for 10 sec TSOL-F Flow)(2,3) EMITTER 50 mA lF Continuous Forward Current Reverse Voltage 5 V VR Power Dissipation (1) 100 mW PD SENSOR 30 V VCEO Collector-Emitter Voltage Emitter-Collector Voltage V VECO 100 Power Dissipation (1) mW PD Kit Packing List 1. This manual 2. QTI sensor unit Setting Up Description The QTI sensor is activated by placing 5 V (Vdd) on the W pin. This will cause current to flow through the 470 ohm resistor to the LED side of the QRD1114. IR light reflecting of the surface below will cause a change in the ability for the current to flow through the phototransistor side of the QRD1114. The transistor, in effect, behaves like an IR controlled resistance. Demonstration Programs ----- Title ------------------------------------------ ---------------------- Mini-Sumo 3.1 : Line Sensor Test STAMP BS2 ----- I/O Definitions -------------------------------- ---------------------- LineSnsrPwr CON 10 line sensor power LineSnsrIn CON 9 line sensor input