HackDAC
Here’s a two-part series about how to roll your own A/D converter out of nothing more than an FPGA and a bunch of resistors.
Part I: theory
Part II: implementation
Reference materials:
- Schematics for the test board
This work by Andrew (bunnie) Huang is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported.
[...] Any tinkerer knows that A/D (Analog to Digital) converters are the heart of many of their projects, especially if said project involves sensors. Here is a great article about rolling your own using an FPGA. Even if you never need to do it yourself there is a lot of interesting theory in there. Well worth the read.http://www.bunniestudios.com/blog/?page_id=21 [...]
The main difference between this item, and the wi-fi only version, is of course the sim card with 3G. So, before I talk about the iPad in general, I’d like to explain my take on the 3G.