circuito impreso.

Introduction

In this article, we'll explain how to make integrated circuits of single or double layer, with the help of sheets wet with high temperature silicone
Normally the toner transfer method is used with magazine sheets or glossy paper, but our practical results are not optimal, because the toner quits from paper with a lot of difficulty, and also in the last stage the cellulose adheres to the copper clad, and the cleaning is very time consuming.
If we add silicone to a sheet of paper and print a circuit with the laser printer, the toner doesn't go out completly fused, so it's very easy to transfer this toner to the copper clad of the PCB.
Also this silicone paper can be reused as many time as you want.

FPGA Card + H Bridge with motors

Developing the electronics and software for a CNC machine with DC servo motors

The embedded systems, are highly integrated systems.
They usually are fisically very small and with a very reduced consume of energy.
With the entrance in the market of the FPGA's. the embedded systems can be reduced even more, and we can talk about SoC (system on chip).
In other words, all the integrant parts of a computer system as the processor, the memory, and the peripherals, fit in a single chip.
FPGA's are blank chips,they can be programmed and develop the electronic circuit we desire. These circuits can be described with special languajes as VHDL and Verilog.

The system that I'm going to talk in this articles, consists in a card with a FPGA Spartan3 and memory.
Its goal will be the control of a CNC machine with 3 DC motors, and it will be comprised of a microprocessed system that will control 3 PWM's outputs, 3 optical encoders inputs and other purpose auxiliary inputs and outputs, to support the final race sensors, buttons, etc...

Milling machine with motors installed

Upgrading a mill to be automatic

The next project that we are going to make is retrofitting a milling machine.
Retrofitting means replacing all the manual elements in the machine for automatic ones. These consist of electric motors, electronic sensors, etc...
A milling machine that is controlled by a computer becomes a CNC device (Computer Numerically Controlled).
In this article we are introducing to the mechanical system of these devices.

Through some years of experience machining with a CNC device, i have seen how easily we can make incredible pieces in metal or more materials in little time, and how the difficulty of machining has moved from the machine itself to the computer programs that designs the pieces. These are the CAD-CAM programs.

A CNC device is for me, one of the most important machines we can have in the yard, and I think it's a must for the professional and the hobbyst.
With a CNC, we can machine all the pieces we need for the projects, fast and with sufficient quality.
With a non automated milling machine, some people are able to make complex things, but with much more work, phisical and mental, and the results usually are not on par with the CNC made pieces.
Also there are shops that can machine the pieces for you, but in the long term it's very expensive for our not deep pockets. There is also the time line, having a cnc in your bag makes you very fast and responsive.
So, I think it's clear that it's cool to have your own cnc machine!!
Our goal is to make a professional machine, this means that there will be no backlash, and it will be fast and reliable (this means we are going to develop a servo motor system with optical encoders).
To understand these terms go on reading...

I don't usually watch television. In Spain there is an important poverty of contents, and in addition it does not help the fact that a film with a duration of one hour and a half is transformed into a film of at least two hours with the amount of publicity they advertise.

Information about what you are watching.

After doing the center multimedia, this is my new form to watch television:
Once a week I program the essential programs for

We know that electronics components are not cheap at all, and it's important to recycle as much as we can to help our pockets, and indirectly to the planet we live.
To do this task easier, we are going to explain a way we have to reuse and recycle electronic components in an easy and cheapy way.

The first thing to do is stealing the iron from the kitchen, in a way that mum or mrs wife don't realize, and it's good if you find a good place to hide it for the rest of your life, as the lead that compounds the solder is very toxic, so it's better if you don't cook with it never more.

Iron to desolder.

Well, here we start our way to virtual land. The goal of this Web is to document our projects in order to reach our main objective: the construction of robots.

The difficulty to construct robots is the need of multidiscipline knowledge, like computer science engineering, electronic engineering, and mechanical engineering, and in addition we will need tools that if made by ourselfs become independent projects in themselves (this includes CNC machines, multilayer PCB with platting through hole, etc..)

Therefore we will talk about developments of PCB's, general electronics, FPGA's, motors, mechanics (also we are going to construct a CNC) and subjects of computer science engineering that it will almost always be locatesd around free software (Linux).

For the Web we have chosen to use the CMS drupal, I think it's a good frame to show our projects.

Everybody interested can register and participate in the forums, and the web articles can be commented. I hope that this can be useful for some of you, or at least, we hope you enjoy reading these stuff as much as we do developing it.

Greets.

The Staff of R0807.com

Ivan Reches
Eugenio Sobrino