Note #102

In reply to: http://www.youtube.com/watch?v=J9cEAGTLaC8

Jesus Christ, I know I am a n00b when it comes to electronics, but why did it take me the whole day of reading tutorials and watching YouTube videos about the Raspberry Pi to find out what I was doing wrong? This video is the first one which mentions that it is important that the cathode of a LED has to be connected to the ground, not the other way around.

11 Replies

Behrouz Talebi, almost 11 years ago

Classic. I'm actually doing alot with my RPi and leds + joystick. Trying to create an emulator-station out of it in haskell.

Behrouz Talebi, almost 11 years ago

Anton Ekblad tipped on this fantastic package, HPi. Great usability.

Jeena Pa, almost 11 years ago

So what are you trying to emulate?

Behrouz Talebi, almost 11 years ago

NES, Snes mostly

Behrouz Talebi, almost 11 years ago

So that the buttons and joystick i'v connected to the GPIO works as input.

Jeena Pa, almost 11 years ago

I see, is it fast enough? And wouldn’t it be easier to connect the Joystick via USB?

Behrouz Talebi, almost 11 years ago

Oh it's no problem with NES & Snes. The beauty of the project is to have an dedicated EMU-box made from RPi and a real joystick as input. The buttons are illuminated so you can play in the dark :D

Jeena Pa, almost 11 years ago

Haha nice :D

Marcus Typ Johansson, almost 11 years ago

Anode + katode -

Lokarlhorst Son V. Dach, almost 11 years ago

the point of a diode is to let a current flow through the circuit in only one direction. this is what happens for example to alternating current https://dlnmh9ip6v2uc.cloudfront.net/assets/2/9/2/f/3/5176f4bfce395f3a61000000.png LED = light emitting diode

Pelle Bergkvist, almost 11 years ago

Hela grundiden med en diod :-)

11 Replies

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