Apple II Plus replica

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pff000

Tinkerer
Oct 1, 2024
32
39
18
Hi everyone,

For a while now I have been building an Apple II plus.
I never had an Apple II before ... so this has been a great learning experience and a fun computer to play with.

The motherboard is a kit from ReactiveMicro, and so is the keyboard encoder.
The keyboard itself is a kit I got from Uncle Bernie over at applefritter.
The power supply is a kit from tindie (dekuNukem).
Since I don't have a case I used a laser cutter to make one out of plywood.
I also got a yellowstone+floppy EMU from BMOW and ram expansion from Kero's Mac Mod.

Everything is finally working yay!!! :)

I was having a lot of trouble with the composite video and various monitors so I ended up hooking up an RGB2HDMI to the video output. I know a lot of people are using VGA or DVI cards. I like the RGB2HDMI solution because it still uses a lot of the Apple II video circuit.

I am planning to build a paddle and adapt a pcjr joystick next so I can play some games...




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pff000

Tinkerer
Oct 1, 2024
32
39
18
And now I can play breakout
Maybe Woz will stop saying my score is terrible! 😁

I only had a 10K pot for the paddle (the Apple wants 150K) so I used correction capacitors (three 0.1uf in parallel to make 0.3uf).
This is a great example of the "RC" circuit response only depending on the product of R and C. I will have to show this to my students in linear systems next year.

Update: I made a nice enclosure for the paddle, with a cherry mx button.

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pff000

Tinkerer
Oct 1, 2024
32
39
18
Connecting the PCjr Joystick to the Apple only requires a couple of resistors and jumper wires.


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