Technology 2nd ESO

So, here you have the tutorial for making your homework with our lamp project. This tutorial is meant to be done during Monday and Tuesday, but you can organize yourselves as you prefer.

PART 1: finishing the shade riser.

In 2ºAB we already covered this part, but we did not have time to do it in 2ºCD, so, everybody from 2ºCD pay attention: you need to cut an inner circle in your shade-risers-base. You started with something like this:

and you need to cut out a circle so the lamp-holder can fit through it and hold it when we screw the lamp holder together, like this:

Now, everybody, should have 4 pieces of cardboard which are 2 cm thick and 25 cm long, and a piece of cardboard which is 2 cm thick and 31.5 cm long. We are going to start with the latter.

Take the 31.5 cm long piece of cardboard and join the edges, forming a circle. You can use isolating tape to keep it together. Now wrap isolating tape all around your circle, like in the picture:

Now it is time to use the other 4 pieces of cardboard. Remember you should have marked a distance of 5 cm on them. The first thing to do would be to bend those strips following that line you have drawn.

Now take the ring you have made and wraped in isolating tape and stick the four cardboard strips to it. Imagine the ring is a watch, you have to stick the four strips of cardboard following the pattern: one at 3, one at 6, one at 9 and one at 12. To do this, use superglue.

Ready for the tricky part? Do not worry, it sounds difficult but it is not difficult at all. Now, as you´ve seen, you have ended up with a, so to speak, 4-legs-octopus, this octopus is going to add the 3rd dimension to your shade riser. You are going to stick the 5cm parts of the strip to the "wheel" you started with, making sure that the bent matches both the outter circle of the wheel and the radious of the wheel it sits upon. You can make a preliminary try hodling it with cloth-pegs to see how it´s finally going to work:

In order to stick the legs to the wheel use superglue again, but be careful, you do not need a lot of superglue here, apply it to the 4 edges of the leg and that will be more than enough. You should end up with something, very very similar, to this (but not painted):

And now... time to have some fun! Use an empty yogourt pot (of similar) to create a magic potion: 80% white glue + 20% water. Mix it thoroughly until you get an even goo and now spread it all over the shade-riser. Yep, all of it! Don´t miss a bit! make sure everything gets covered by your magic goo! This is the part that, after 24 hours of rest, will end up by giving us a hard shade-riser, even when it´s made of cardboard.

Leave the shade-riser aside, and let´s start with the ...

PART 2- Electronics

You got a piece of cable that I gave you today, first of all DON´T CUT IT IN TWO HALVES UNTIL WE GET TO THE LAMP HOLDER PART!

Starting with the plug, we will use the too loose ends of your cable. Unscrew the plug:

Now you will see two terminals, peel the edge of the cable until you get a clear shot of copper.To do so, cut, with your scissors, the plastic that´s covering it and pull outwards (WARNING: DO NOT PEEL THE CABLES USING YOUR TEETH, COPPER FIBRES ARE VERY VERY SHARP AND THEY PRODUCE PAINFUL CUTS IF YOU DON´T NOW HOW TO DO IT PROPERLY. ALSO, THEY CAN HARM YOUR TEETH). Now remove the screws in the terminals and pass the copper through the holes, securing them again but screwing the screws back where they belong: