this is a new series of instructables i want to start called (building components)
in this instructable i will be showing you how to build your own resistors. this is good to know if you need to have a resestor with a specific value that you cant find elsewhere.
it is actually really simple i will show you two basic methods including one where you draw a resistor. so in the next step ill give you a parts list
please visit my website for more information on this project and more at http://www.ljlabs.co.za
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Step 1: Parts List
*1x carbon graphite clutch pencil nib
*1x sheet of paper
*1x pencil(normal hb)
* 1x crocodile lead
* 1x multimeter
first the basic resistor method this involves tacking a piece of carbon graphite and putting leads onto it.
connect the crocodile lead to the end of the pencil nib and the other to one end of the multimeter,
next turn the multimeter to the resistor setting
and final take the free lead of the multi meter and run it up and down the nib (potentiometer)
to get a constant value take a second crocodile lead and connect it at specific points on the nib (resistor )
Step 3: Drawing a Resistor
this involves using the pencil and drawing a rectangle on a pice of paper
first take the pencil and draw a long rectangle
next color it in with the pencil and try to make it very shiny
then take the croc lead connected to the multimeter (set on resistor) and clip it onto one side of the rectangle
finaly take the free lead and run it up and down the rectange and watch the resistence level
to get a constent value do the same as with the previous step
Step 4: Why Does This Happen
in electronics the resistance of a meterial depends on 3 tngs
the type of matrerial
the tempreture of the material
this size of the material
and since we are keeping to vairabels constent and controlling the third we can controll the materials resistance.
i chose carbon graphite because carbon is not a metal, which is very condutive. it is a but it is one of the very few non-metals that is partialy conductive and this is what we are using in our favour