Ye boi. So the body is coming together even though it’s part black and will be completed in orange. So I made a little power distribution module to take the batteries 12V and set it where it was needed.
So far the battery low, screen and the 5V regulator for the pi. I remembered though that I’ll need power for the audio amp because I figure the poor lm7805 is taking strain as it is, rather give separate power to the audio and take a bit of the load off. That said, I’m going to replace the 7805 circuit with an LM305 adjustable voltage regulator. This little baby can go all the way up to 3A which should mean it doesn’t heat up as much(I hope) I’m going to put on a heat sink anyway though.
So I got this little audio amplifier module from dx.com a while ago and figured… perfect opportunity.
Unfortunately, I can’t read so when I tried to test by plugging one speaker into it and then the headphone jack from my PC into it, the genius within didn’t look on the module and whacked 12 volts on the V+ pin and a slight pop sound and tiny spark happened, shortly after, a whiff of smoke rose up from the module.
Poopy pants. So there went the whole easy audio thing.
2 x 8ohm 3W speakers to be driven. Not sure how much power I’ll give them. Probably not so much because of the danger of a flat battery too soon. Anydoodle, I’ll have to build a 2 channel audio amp myself 🙂
Should be interesting and fun.
I’ve been getting annoyed with having to be so delicate with the PI and making sure when I put it down there’s nothing metal under it and that I don’t accidentally drop a bolt or spill some wine on it:
So once again, 3d printer to the rescue:
It didn’t fit perfectly into the base so I used a bit of force and the soldering iron to make a couple of tiny mods so that it got in there. I am not sure if it will ever be able to come out but it shouldn’t need to. The case came out ok but the top doesn’t quite fit properly. I think that maybe the heat from when I was using the iron to help make it fit must have warped the case a bit. I don’t think it’s too bad though. besides, this project has the case inside anyway. I’m much more concerned about beemo. I need to figure out a way to flatten his face nice and smooth.
I can’t take credit for the design of the case. I got it from here:
Thanks Buhi. I like this design because it’s minimalist and is just a perfect box for what I need. Very few openings so hopefully very little dust will get in there. I also really like the feet with screw holes. Perfect for my application.
I would rather not have downloaded it from thingiverse and would quite like to not have that link here but I must give credit where credit is due and for now at least, I can’t find another site to get designs from.
Here’s the box: