This video will you show how to make a JDM2 PIC programmer and to learn  how to burn firmware on a PIC microcontroller in different ways.

 
Source: Diylife

 
Source: afrotechmods

The goal of this tutorial is to teach you how to take a circuit drawn in a fabrication program like Altium or Eagle and make it a real-life PCB. To accomplish this we will need about $20-25 and a few hours of spare time.

Source: pyroelectro

An indicator is nice, but how to implement that? Because all the intelligence of the heat regulation happens inside the soldering iron, the station itself is just a big 230->24V-transformer and an on/off-switch. Running an extra wire to the soldering iron to sniff out its status wasn’t an option. There is another way to get [...]

Most old PDAs use CCFLs as backlights. While such a PDA itself can still be quite useful, the backlight sometimes is old or damaged. You can, however, replace it with a more modern and power-friendly solution: white leds. To do that in a power-efficient way, a bit more is needed, though.

Source: spritesmods

Keep your laptop and cell phone’s power plugs from falling off the back of your desk using a simple binder clip, no modification required. A very easy and inexpensive solution to a few binder clips. Binder clips are for sale in a commercial office or maybe you even have office located somewhere. The binder clips [...]

You need in order :

Laminating pouches
Water
warme water frome tape+iron Perchlorure
Solder cream
Acetone
Oven

This video will show you how to etch a circuit board. Nice explanation.

Source: Makezine

An oscilloscope is a type of electronic test instrument that allows signal voltages to be viewed, usually as a two-dimensional graph of one or more electrical potential differences (vertical axis) plotted as a function of time or of some other voltage (horizontal axis). Although an oscilloscope displays voltage on its vertical axis, any other quantity [...]

In this post, TechshopJim will show you how to etch a circuit board with about a tablespoon of ferric chloride etching solution and a 2 inch square sponge. You will be amazed as the exposed copper on the PCB disappears before your eyes, and your board is completely etched in a minute or less!
Source: TechshopJim

Having recently tested a lot this method, I’ve finally determine my “easy and cheap” way to build PCB using toner transfer method.
Source: sirblog