Step 1: Place the Flasher IC
Step 2: Connect Pin 1 to Pin 8
The pins are numbered anti-clockwise around the IC (chip) starting near the notch or dot.
The green line in the illustration.
Step 3: Insert the Capacitor
The purple lines in the illustration.
Step 4: Insert the LED
The bluegreen lines in the illustration.
Step 5: Connect Pin 5 to Positive
The red line in the illustration.
Step 6: Connect Pin4 to Negative
The blue line in the illustration.
Step 7: Ready to Put Battery In
The 3909N IC only needs a 1.5V battery (AA), so you can use a battery holder to help keep the battery in place.
Step 8: To Change the Speed of Flashing Rate
You can easily change the increasing the flashing rate by having a smaller capacitor. Or a slower flashing rate with a larger capacitor.
Different colors of LED also has a different rate, too.
For my LED Counter, I used 220m capacitor for the yellow LED, which is flashing about every second, and 330m for the slower red LED on top, and 100m for the faster red LED at the bottom.
For more information on my LED flasher, you can visit my site at http://dma.sjsu.edu/~art103/Students/chen/LEDclock.html