555 Integrated Circuit? PLEASE HELP!?

Question

What is it?

How is it made?

What are the legs called?

What do the legs do?

Where are they used?

Thank you

Answer 1

Yes it is a timer chip. The length of time is dependent on the RC (resitive capacitive) components used.

Answer 2

This integrated circuit is used for timing. Many circuits are composed of timers and the most common of them all is the 555 Integrated Circuit. The 555 integrated circuit (IC) is a chip that is used in many school projects and commercially made items such as video recorders and timers. You must understand the basic workings of this important IC.The 555 has eight pins (legs) but the function of two are very important. These are pin two and three.    

The circuit below is a simplified version of a 555 circuit. It is a timer. When the switch is pressed a current / voltage goes into the IC through pin two (the input pin). The chip starts counting and when it has finished counting it ‘pulses’ a current or voltage from pin three (the output pin). This voltage from pin three switches a transistor and allows the LED to light.

The time from pressing the switch to the LED lighting could be anything from 1 second to twenty minutes.

Answer 3

It is a timer circuit.

So you don't want to learn, just get the answers for your homework eh?