The components

All the ecletronic components used in this project are as follows.

res1.gifThe Resistor

Resistors determine the flow of current in an electrical circuit. Where there is high resistance then the flow of current is small, where the resistance is low the flow of current is large. Resistance, voltage and current are connected in an electrical circuit by Ohm’s Law.



Resistors are too small to have numbers printed on them and so they are marked with a numberrestab1a.gif of coloured bands. Each colour stands for a number. Three colour bands shows the resistors value in ohms and the fourth shows tolerance. Resistors can never be made to a precise value and the tolerance band (the fourth band) tells us, using a percentage, how close the resistor is to its coded value. The resistor on the left is 4700 ohms.





An L.E.D. (Light Emitting Diode)



Light Emitting Diodes (LED) are very rugged, they last a very long time and they are an optical source. (A LIGHT SOURCE)


LEDs produce red, green, yellow, or orange light. They are used in a range of products.

Can you name any?



LEDs are part of the diode family, consequently they must be connected the right way round or current will not pass through.


They are usually protected by a resistor.ld11.gif











7 Responses

  1. Heyy .. is this all the stuff we need to know for are exams for the electronics/tools/components ? ..

  2. This is the information for 1st year only.CTD

  3. Is the Thristor included in the steady hand game? Do we need to know about the Thristor for the exams?

  4. what are ohms and what are they used for or what do they do?

  5. This is one of the components used in the steady hand game.

  6. It is the measurement of resistance.

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