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Altera_Forum's avatar
Altera_Forum
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14 years ago

D5M digital camera with DE2

Hi, I am planning to implement a heart rate monitoring system using the DE2 board. I plan to implement the pulse oxymetry technology for which I would need a camera. I also plan to use the Nios...
Altera_Forum's avatar
Altera_Forum
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14 years ago

Depending on your application, you might be able to use the LEDs directly, connecting them to the GPIOs (with a suitable resistor). You can do it two ways:

1. using the i/o pin as a sink

2. using i/o pin as a source.

For the first option, use the VCC pin on the GPIOs as your source, and the sink should be the I/O pin. In this case, the LED would light if your I/O is low, and turn off when your I/O is high.

The second option is just to use your I/O pin as the source with LED and resistor connected to ground.

You can then control the brightness of the LED with a PWM signal.