My Circuit

 These two mounting methods were devised to protect PC boards from vibration when installed in the engine compartment of a car. They could also be used in other applications where vibration is a problem. Method 1 involves rigidly mounting the PC board inside a diecast box and then mounting the box itself to provide vibration isolation. As shown, small grommets are installed in suitably sized holes in the sides of the box. The box is then secured to angle mounting brackets using M4 screws, washers and nylock nuts. Method 2 involves mounting the diecast case onto the chassis of the car and then mounting the PC board as shown, using M3 screws, grommets, hollow spacers and nylock nuts. In this case, the grommets are fitted into suitably sized holes in the PC board itself. Once the nuts are tightened, the PC board should be able to move slightly, relative to the box. If there is not enough space on the board to fit the grommets, then Method 1 is the way to do it. Author: David Boyes - ...

How to make printed circuit boards, 1 Firstly, we are to draw a circuit with a design program. There are many great programs, you just have to browse for them a little on the Internet and see which one fulfils your necessities. The program we’ll be using is called “Eagle”. It’s a great design program that also has Mac and Linux versions; there is a “light edition” that can be downloaded for free, with size limitations - it can only make 10x8 cm boards. All designs from this web page are made with that version. It is quite enough at the household level. Therefore, we’ll begin with a prototype made with this program. Necessary material: -A program for circuit design, in this case, “Eagle”. -A printer, if it’s laser, even better; normal printer also works fine, but later you’ll have to make a photocopy. -Glossy photograph paper (Epson photo quality, 140g/m2 or similar) -A board of a printed circuit (glass fiber), dual layer in this case. -A solvent. -A plastic container where we can...