This instructable will show you how to make a green frog with flashing LEDs. The LEDs that will be used are special LEDs. They turn on and off every second without any additional timer circuits.
The complete circuit will be placed inside the frog made from plasticine.
This is how the frog will look like in video: http://www.dailymotion.com/video/xxkdl2_blinking-frog_tech#.USCMsB2buro
You will need:
- flashing LEDs
- 9 V battery
- 9 V battery harness
- 470 ohm resistor
- electrical tape
- play dough
Step 1: Assemble the circuit
Assemble the circuit as shown in the picture.
Connect the anode the positive terminal and cathode to negative terminal. http://en.wikipedia.org/wiki/Light-emitting_diode
Longer leg is always the anode. http://www.sparkfun.com/tutorials/222
The LEDs conduct only in one direction. Thus you will have to flip connections if they are not conducting.
Do not forget to connect the 470 ohm resistor! You will burn the LEDs.