Im working on a lap timer for RC Cars that will use my Laptop along with Lap Timer 2000 Software. It calls for IR Photo transistor connected to the joystick port of the PC. The IR Recieving side with the Joystick port was layed out clearly...
My Question is about the IR LED. How do I power a single IR LED?
IR LED Specs
• Radiant Intensity (mw) 7.368
• Peak Wavelength (nm) 940
• Forward Voltage (V) 1.28
• Half View Angle (Degrees) 36.36
Power Supply Specs
• Selectable Output Voltage: 1.5, 3, 4.5, 6, 7.5, 9, or 12 VDC
• 300mA
What voltage should I select? What size resister should I put on the Cathode side? Is a single resister all i need?
If I used 2 IR LEDs. Paralell or series? What voltage and and resistors should be used?
My Question is about the IR LED. How do I power a single IR LED?
IR LED Specs
• Radiant Intensity (mw) 7.368
• Peak Wavelength (nm) 940
• Forward Voltage (V) 1.28
• Half View Angle (Degrees) 36.36
Power Supply Specs
• Selectable Output Voltage: 1.5, 3, 4.5, 6, 7.5, 9, or 12 VDC
• 300mA
What voltage should I select? What size resister should I put on the Cathode side? Is a single resister all i need?
If I used 2 IR LEDs. Paralell or series? What voltage and and resistors should be used?