555 LED Flasher



>Here is how to assemble a flashing led on a breadboard. This is a good thing for getting used to breadboards and assembling circuits and all that stuff.










1
   


> Find some space for your breadboard. Put it horizontally with the red stripe (if you have one) at the top. (unlike this picture)









> This is the circuit were gonna build












2
   


> Insert the LM555 with pin 1 to the right. Pin 1 is the pin with the dot beside it.















3
   


> Insert wire from pin 1 to ground.















4
   


> Insert wire from pin 8 to positive















5
   


> Insert wire from pin 2 to pin 6.















6
   


> Insert wire from pin 4 to pin 8.















7
   


> Insert a 1k resistor between pins 7 and 8, this is a 20 ohm resistor, oops...















8
   


> Insert a 68K resistor between pins 6 and 7.















9
   


> Insert the 10uF capacitor between pins 1 and 2, make sure the - side is on pin 1.















10
   


> Insert a 1K resistor from pin3 rightwards, this one is 470 ohms, oops...















11
   


> Insert the LED with the negitive side on the resistor.









> You can usually tell the polarity by what I call 'Anvil' (negitive side, 'cathode') and 'Post' (positive side, 'anode'), in this pic, you can see the anvil on the left and the post on the right.












12
   


> Insert wire from the anode of the led to positive. Then Apply power (You can use a 9V battery) and watch it flash, remember, Red is positive, Black is negitive (in this case blue)