Day 1
Today, I started some research about how I could do this, and I think I want to try and make a Attiny85 dev board thing (or something like that!). Andddd I found some resources:
- https://www.microchip.com/en-us/product/attiny85
- https://github.com/tomasr8/attiny85-dev-board
- https://github.com/SpenceKonde/ATTinyCore/blob/v2.0.0-devThis-is-the-head-submit-PRs-against-this/avr/extras/tinyNeoPixel.md
Weeeell, lets just say I didn't really understand the datasheet... Still, I did some googling and found some examples. I guess what they usually have is like, the chip, a voltage regulator, a bunch of resistors.. diodes... etc.. looking at the example though, it made me understand more, which was awesome :D
The Plan
sooo here's what I'm gonna like add;
- battery
- built in neopixels or some led
- usb-c?
Day 2
I did the schematic!! I kind of just followed an open source board but I used a usb-c and used smd components. I also added some neopixels :3 There's this tp4056 to charge the battery through the usb and i hope it works.
(I wrote this on day 3 tho)
I looked at an open source board I found on github, yea.. and I think I want to try to use a hot plate so I guess there's like smd components (?) Btw tysm acon, I got on a call with acon and she help me with my usb c :3
Day 3
Today, I finished the schematic and added footprints.. uhh I will add to this a bit later cuz I need to do some stuff :( Here's the pcb thing! without the wires connected tho
I don't know what to write here, but I guess... it looks pretty.. nice?
Day 4
I spent around 2h routing the pcb! This is the end result and its like 4 layers. While routing the pcb, I kinda selected the wrong footprint for resistors so I had to redo some stuff.
But then like there's this problem at the usb-c so idk how to fix it...
Silkscreen
I used figma and took around 30 minutes drawing kinda random stuff, and here's what happened:
idk what to do at the back, i guess. its going to be covered by the case. next up tho imma go link the bom/make casing :3
Day 5
I did a complete overhaul of the pcb, ended up like this:
So uh, its almost the same except i added a switch for power on/off, a push button and some resistors. I also spent some time looking at lcsc and adding stuff in bom
Day 6
so today, I made this little case. it has 4 components which are the main thing, the small top cover, the acrylic cover and the button cover. the main color is purple I guess? and this is what it looks like
though because of skill issue, it's not the best case... (ah well.) but it would be held together with glue. basically, there's this very small line at the very top that i will apply glue to at the main base, and it will glue to the top covers. I will also use small pieces of double sided tape to hold the pcb in. (I hope it works.) other than that, apprently the pcb didn't export nicely and the edge cuts are broken (?) soo that's that.
little list of features of the case
- a small compartment for battery
- 2 hooks for camping strings
- button cover?
- a place to put acrylic
- holes for usb and switch
Day 7
I fixed the edge cuts, now I have it properly in fusion! I also made a small doodle cat on the silk screen.