add readme with pictures

README.md

@@ -0,0 +1,41 @@
+usb-c charging for 3ds/3dsxl/new3ds/new3dsxl
+---
+
+![front side](pictures/front.png)
+![back side](pictures/back.png)
+
+what?
+---
+
+a pcb that lets you convert a 3ds to usb type c charging
+
+ok cool i want one
+---
+
+now comes the unfortunate part... this pcb uses *castellated holes* which adds a large base price when ordering it.
+(e.g. 5 of these cost ~37€, 30 cost ~40€ at jlc as of this writing)
+
+if you know me irl i have some of the v1 boards left over, they have some flaws but they work
+
+v1? the pcb says v2?? i'm confused, what changed
+---
+
+in the first version of this board there were still a few issues. the changes from v1 to v2 are as follows:
+
+- fix hole spacing. in v1 the holes were barely aligned enough to work without adding wires everywhere, in v2 those should be much better
+- shorten the pcb. this avoids having the pcb intersect with the lower case of the 3ds, so v1 users have to cut a larger hole into their case
+- use 0603 resistors instead of 0402
+- add some silkscreen
+- one of the castellated holes is no longer electrically isolated
+
+the first version is not available anywhere due to it being obsoleted by v2.
+
+ok what's next?
+---
+
+- [x] design and order v1
+- [x] test v1 on actual hardware
+- [x] learn from it and find improvements
+- [ ] write blog post and link here
+- [x] design v2
+- [ ] test v2 on actual hardware