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geekhack Projects => Making Stuff Together! => Topic started by: adventurepoop on Thu, 22 May 2014, 14:08:35

Title: Help with circuit?
Post by: adventurepoop on Thu, 22 May 2014, 14:08:35

After finding out I wired up my 5 key keyboard wrong last time, and finding out I only had 3 usable io, I came up with this as a circuit.
http://imgur.com/71QqrdD

With switches 1-5 and io abc, Would this work? I don't know much about circuits but it looks like it to me :o

Title: Re: Help with circuit?
Post by: Smasher816 on Thu, 22 May 2014, 14:49:38

Mind rotating the image, it would help everyone see it better. Imgur has that feature built into its edit menu.

Title: Re: Help with circuit?
Post by: adventurepoop on Thu, 22 May 2014, 15:22:42

Actually I figured it out, but yeah I didn't know at the time

Title: Re: Help with circuit?
Post by: Smasher816 on Thu, 22 May 2014, 17:07:51

Glad you got it figured out.

Title: Re: Help with circuit?
Post by: OldDataHands on Thu, 22 May 2014, 17:26:36

Quote from: adventurepoop on Thu, 22 May 2014, 14:08:35

After finding out I wired up my 5 key keyboard wrong last time, and finding out I only had 3 usable io, I came up with this as a circuit.
http://imgur.com/71QqrdD

With switches 1-5 and io abc, Would this work? I don't know much about circuits but it looks like it to me :o

Nope. This circuit will not do what you want. For example: switches 1 and 5 are indistinguishable. As long as you are ok with ghosting above 1 key pressed you can use more diodes... if you have analog inputs, you have some good options...