How to make printed circuit boards 2

Now we’ll prepare the glass fiber. We are going to cut it a bit bigger than our design, leaving a small margin. We cut the page design, where the “Top” parts were in normal vision. We attach the page to the glass fiber with a little bit of sellotape. We choose two pads which are situated at both extremes of the design, one that is at the upper part and the other one at the other extreme end, but in the lower part.
We make a hole with a hand drill in the mentioned pads. The hole should be 0.8 mm wide.

We have to look carefully at the pads we have chosen, since now we have to make a small hole with a pin in the photograph paper, on the page which coincides with “Top” mirrored part and with the “Bottom” part.

We now leave a photograph paper with design and we take a kitchen towel and a solvent. We remove the page which was attached to the glass fiber and we rub the copper with the kitchen towel dipped into the solvent, so that it becomes shiny on both sides.
Once we have done this, we mustn’t touch the copper with our finger, and that is why we’ll take the board by the edges. If we touch it the toner won’t be printed later on the board.

Now we have to fit the little holes we had made in the photograph paper onto the hole made by the hand drill. We’ll attach it with the sellotape.

Ok, so far, so good. Now we take an object against which men and women likewise bear a grudge, our beloved iron.
We adjust it on the half of the scale, marked as “cotton”. And, of course, without vapour. We wait until it’s hot and we start pressing a paper which covers our glass fiber with the iron.
It goes without saying that you should put another cloth between the glass fiber and the table. We continue ironing and we alternately press it strongly with a cloth. We repeat the process on the other side.

We should spare 10 minutes on each side, ironing and pressing with a cloth. Immediately after this, while the glass fiber is still very hot, we place it in a recipient filled with cold water and we leave it there for 10 minutes. It’s a mistake if you leave the copper to cool it; it’s supposed to be placed in the cold water while it’s still very hot.
After 10 minutes we remove the paper from the copper very slowly. If we have done it properly, the paper should come of easily.

A basic Arduino Solar PV Monitor

I have just recently had solar pv installed, mainly to future proof my energy costs, I do not expect it to be like drilling for oil in my back garden, however the return looks to be encouraging. The install gives you another single unit meter, from this you will see the total amount the panels produce, but that is about it. I wanted to know how much the production was as it was happening, I discovered the light blinks on the front of the meter will flash 1000 times for each kWh of electricity which passes through. The rate of the flashing of the LED tells you how much power is currently passing through the meter. [ ]

Build a Key Operated Gate Locking System Circuit

This simple key-operated gate locking system allows only those persons who know the preset code to open the gate. The code is to be entered from the keypad within the preset time to operate the motor fitted in the gate. If anyone trying to open the gate presses a wrong key in the keypad, the system is disabled and, at the same time, sounds an alarm to alert you of an unauthorized entry. Figs 1 and 2 show the block and circuit diagrams of the key-operated code locking system, respectively. Connect points A, B, C, D, E, F and ground of the circuit to the respective points of the keypad. Keys S7, S16, S14 and S3 are used here for code entry, and the remaining keys are used for disabling the system. It is very important to press the keys in that order to form the code. To start the motor of the gate, press switches S7, S16, S14 and S3 sequentially. If the keys are pressed in a different order from the preset order, the system will lock automatically and the motor will not start. Fig. 1: Bl...

Apple releases TV spot for new iPods

Apple has just released a fun commercial to showcase its new line of iPod players and the various colours they come in. The TV spot titled ‘Bounce’, has a bunch of colourful iPod touch, iPod nano and iPod shuffles er…bouncing to music. With all that colour and dancing and bouncing, you may forget that Apple’s latest gen line of iPods has some other awesome features. For instance, the fifth gen iPod touch comes with Siri, 4-inch retina display and an A5 chipset. Maybe the next ad will showcase some of these features with less bouncing.link

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