If you are developing applications for the PIC, and miss the costly debugging tools, or can’t afford a parallel LCD interface in your design, this serial interface can help printing debug messages and/or reduce the pin count. This version uses a Hitachi HD44780 compatible LCD module in 4-bit mode. The interface is based on the idea of Myke Predko.source

Here is a nice article about how to build a Wi-Fi Antenna Out of a Tin Can.There are two popular types of homebrew Wi-Fi can antennas, the Pringles can antenna and the tin can antenna. They both have the same means to an end-increase signal strength in one direction-but they differ radically in operation and construction.source

The range of a WiFi router can be considerably extended simply by connecting a directional antenna. Standard omni-directional stub antennas are at the lower end of the performance scale, and they quickly come up against their limits when you need to give your own home better coverage, provide your neighbour with DSL, or pick up as many radio networks as possible while war driving.The simply made tin-can antenna, with the dimensions given here, is suitable for base stations and for clients who transmit on 2.4 GHz in accordance with the IEEE 802.11b and 802.11g standards. 802.11a uses the 5-GHz band, requiring different antenna dimensions. source

Here is a nice article written by Collin Allen about how to Interfacing 3.5″ hard drive with the iPod he writes:

What is this about?
Ultimately, I’d like to get a regular 3.5″ hard drive working with the iPod and explore what capacities it can make use of. The fact that it would be a huge unit will simply be a novelty.

Why do this?
This project came about after I dropped my 40 GB 3rd generation iPod and killed the hard drive in it. I decided to open up the iPod and see what I could do with it. I could do so without fear of breaking it, since I’d already broken the most expensive part in it.

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This is tutorial how to build a parabolic microphone from old Lamp.This tutorial presented by Mitchell.He want to turn a Planet Lamp into a parabolic microphone.The amplifier circuit is based on a very popular headphone amplifier called CMoy.The CMoy is a very simple, low power amplifier. It’s cheap to build and is designed to run on a 9V battery.I really like this idea.source