This Instructable will show you how to make a blinking LED with a 555 timer IC on a breadboard, view the attached video to see it in action.
Step 1: Materials
You will need:
1 9V battery
1 9V battery connector
1 Capacitor, I am using a 47μF, the higher the number the slower it will blink, 47 works good.
2 resistors, a 10K and a 150Ω
1 +5V voltage regulator
1 555 timer IC
Assorted jumper wires
Space to work
Step 2: Mount the IC
Take your 555 timer and find the small dot (picture 1) Make sure that dot is in the top left corner, then mount it in the board. The dot needs to be in the top left so we can know what pin is where. Push the chip in until it stops.
Step 3: Wire up the IC
Now, we want to connect Pin 1, to ground. Pin 8, to +9V.And Pin 2, to Pin 6.
Step 4: Connect the 2 power buses.
Now, take a wire and connect the negative on 1 bus to the negative on the other bus. This is so we can use 1 power source to power the entire circuit, since we are using both buses.
Step 5: Attatch the LED
You will want to put the positive lead on the LED to pin 3, and the negative straight to ground.
Step 6: Putting in the capacitor
For the capacitor, you will want to put the negative lead directly to ground, and positive to pin 6.
Step 7: Resistors
Take your 150 and 10K Ohm resistors, and put the 10K from pin 6 to pin 7. Then the 150 Ohm from pin 7 to positive. If you put the 10 K from 7 to positive, and the 150 from 6 to 7, you will get a much slower blink.
Step 8: Voltage regulator
You will want to place the voltage regulator with the protruding part facing the power bus. Then put 1 wire from ground on the regulator to ground on the bus. The another wire from output to positive.