Green light on the LED faints away...

[Serina Xiaodan Tan]

The first user input lights up the corresponding green light accordingly. The second user input triggers a second green light. However, from this point onward, no green light can be lit up and the first two turn off as well. The green light seems a lot dimmer than normal. The LEDs can light up red with no issues throughout the game.

I am suspecting there is a limit on how much power the GPIO ports can output overall. Also, the green light somehow consumes more more than the red light. My next step is to dig into the power limit of the pi and see if I wire up the green light node with different resistors.

[Serina Xiaodan Tan]

http://www.mosaic-industries.com/embedded-systems/microcontroller-projects/raspberry-pi/gpio-pin-electrical-specifications#rpi-gpio-input-voltage-and-output-current-limitations
All the GPIO ports can only source 50 mA of current simultaneously. However, each LED will need ~10 mA to operate.

Thus... We will need a new design....