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Arduino Forum Pokémon Tamagotchi using Digispark - Help needed
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  • pokemon
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Related

Pokémon Tamagotchi using Digispark - Help needed

herrlichakafool
herrlichakafool over 11 years ago

Hello element14 community,

 

i found an old Gameboy Color in my basement with Pokémon Red in it, and since i am looking for a project for quite a while now,

i am willing to sacrifice it for the sake of modding.

 

Since my knowledge of electronics is basic, i hoped that some of you could help me out.

But first let explain my idea:

 

There used to be an interactive stream on twitch.com which allowed all viewers to play Pokémon at the same time.

People where able to enter one of 7 commands in the chat (Up, Down, Left, Right, Start, A, B),

which where then interpreted as commands for an emulator running Pokémon.

 

Example:

TwitchPlaysPokemon - Twitch Plays Pokemon (Red) 12d20h37m ~ 14d14h50m - Twitch

 

These semi-random inputs led to hillarious moments, which i want to recreate (sort of) by using an old Gameboy Color and a Digispark.

 

The idea is that the Digispark (which is a tiny Arduino-like microcontroller) enters random key inputs into the Gameboy, so it plays the game for itself.

When i started this project, i soon ran into some problems that i can't solve myself:

 

1. The schematics:

 

I generally know how to do it, but when it comes to really doing it, i fail. My Digispark can deliver 5V on each pin, when i measured the voltage on each button

i got about 3.4V. The output of the Digispark can be regulated, but i am sure that i need some resistors in my project. Any ideas?

 

2. Not enough pins

 

Here is a 3D render of a Digispark.

digispark-mini-arduino-newdesign.jpeg

As you can see, it has 6 pins. But the project requires 7 output sources. This could probably be done by creating a matrix, but again my knowledge is not advanced enough. Can someone give me a hint?

 

I would be really thankful for any kind of response. I don't want to accidentally trash my Gameboy, that's why i created this post.

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  • Former Member
    Former Member over 11 years ago in reply to herrlichakafool +1
    I'm the creator of the Digispark - to clear up a few things: The Digispark is an ATTINY development board it uses the Attiny85 microcontroller and allows it to be programmed over USB with the Arduino IDE…
Parents
  • herrlichakafool
    herrlichakafool over 10 years ago

    Hey,

     

    it took some time for me to update my project, but here we go:

     

    I soldered really thin wire to some testing points on the board of the gameboy for following pins, with their randromized chance to be pressed in brackets:

     

    1. Ground image

    2. Up (25/200)

    3. Down (25/200)

    4. Left (25/200)

    5. Right (25/200)

    6. A (50/200)

    7. B (40/200

    8. Start (10/200)

    image

    image

     

    He runs like a charm, with the Digispark hanging on an USB source and the Gameboy on a 3V 200mA power brick.

    Now again, any tips how to run both on one source? I have plenty of spare power bricks with differentvoltages, so any tip would help.

     

    Besides, i want to add some type of lightsource, maybe a LED strip. Also if you want to know, he is still at the first town and can't make it to the second town and he has a level 43 Bulbasaur,so he didn't evolve image

    In addition, i want to add some sort if input to control the chances of a button to be pressed, maybe some Potentiometers? I imagine them to be placed in between Gameboy and micro controller, so it can read the resistance.

    Are the pins capable to pull this off?

     

    Would like to get some feedback from you, i'll keep you up to date.

     

    Best Regards,

    Theo

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  • herrlichakafool
    herrlichakafool over 10 years ago

    Hey,

     

    it took some time for me to update my project, but here we go:

     

    I soldered really thin wire to some testing points on the board of the gameboy for following pins, with their randromized chance to be pressed in brackets:

     

    1. Ground image

    2. Up (25/200)

    3. Down (25/200)

    4. Left (25/200)

    5. Right (25/200)

    6. A (50/200)

    7. B (40/200

    8. Start (10/200)

    image

    image

     

    He runs like a charm, with the Digispark hanging on an USB source and the Gameboy on a 3V 200mA power brick.

    Now again, any tips how to run both on one source? I have plenty of spare power bricks with differentvoltages, so any tip would help.

     

    Besides, i want to add some type of lightsource, maybe a LED strip. Also if you want to know, he is still at the first town and can't make it to the second town and he has a level 43 Bulbasaur,so he didn't evolve image

    In addition, i want to add some sort if input to control the chances of a button to be pressed, maybe some Potentiometers? I imagine them to be placed in between Gameboy and micro controller, so it can read the resistance.

    Are the pins capable to pull this off?

     

    Would like to get some feedback from you, i'll keep you up to date.

     

    Best Regards,

    Theo

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    • Vote Up 0 Vote Down
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    • Cancel
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