The race to the finish line continues ever onward.
When modding electronics, it's essential to take detailed notes so you know where to reconnect stuff. Who cares if you use proper diagrams or know all the names of all the components - all that matters is if you can reconnect what you took apart:
Once I followed all the traces and made my own pinout, it was time to score the circuit board with an exacto knife and snap out the chip:
I then scraped the traces, applied some flux, and tinned them:
Rekarp has experience with these rubber contact buttons and he highly recommended putting something in the middle of the dpad area to prevent what he calls "rollover", which is when you press really hard in one direction and it accidentally presses in another direction as well. I drilled a small hole and inserted a screw:
The dpad sits just like it used to, but now it has something in the middle to help it rock in only one direction instead of squishing all the buttons at the same time. An easy fix to a problem I wouldn't have discovered until the project was completely finished. Thanks Rekarp!
I tacked the speaker in place with a little bit of hot glue. It came from a hip gear screen, and was the only speaker small enough on hand that would fit this project. I used two in my SuperBoy project, and they sound perfectly fine. Nice and loud.
This project enclosure box from OKW is the perfect size for a NOAC portable. My voltage booster is that little thing on the right.
I connected the screen's circuit board and did a test fit. Uh oh - it's too thick inside!
But never fear - a bit of quick soldering relocation work and all was well:
In my Advanced Instrumental Analysis class, we discussed operational amplifiers. I already had a bit of experience with them from building an audio amp for portables! I noticed that this board uses an LM386 for the audio circuit:
See? Right there:
Well, time for class. I may work on this some more tonight, but if I don't then it will be well into next week before I get any more progress. I'm going to be a wee bit busy this weekend - I'm sure you all can forgive me if I take a short break!
sweet. ive spent a third of my life on benheck!