In this Instructable you will make a LED flasher. You will also be able to adjust it.
Step 1: Bill of materials
1x 555 timer
1x 9 volt battery and clip
1x 220μf capacitor
1x 101 Ω resister
1x 101 Ω variable resister
1x 900 Ω resister
Step 2: The schematic
Here is the schematic for the flasher.
Step 3: Insert the wires and the timer
Connect pin 2 and pin 6. Connect pin 1 to the negative of the battery clip. Connect pin 8 to the positive side of the battery clip. Sorry for the bad pic.
Step 4: Connect the other parts
Connect the 220 uf capacitor between pin 1 and 2. Connect the led anode(+) to pin 3. Connect the led cathode(-) to the 101 ohm resister. Connect the other end of the resister to ground(-). connect the variable 101 ohm resister between pin 8 and 7. Connect the 900 ohm resister between pins 6 and 7.
Step 5: Your done!
Yay, your done! You can change the frequency of the blinking by turning the variable resister knob.