The main attraction of this instructable is the LED has a throbbing effect which looks good with the heart.
For this you will need a image probably from a card like i have used or you can even use a personal picture of your loved one.
So if you are interested get started and have fun making it!!!!!
Step 1: Parts list
Pick any image of your choice. Or you can use the one i have used. i have attached a PDF.
BC547 NPN transistor
100uf electrolytic capacitor
470 ohms and 33k ohms resistors
LED preferably red
Switch (not shown in image)
9v battery adapter
Breadboard for prototyping
Step 2: Circuit Diagram
For this instructable you will need a basic understanding of electronics.
I have used BC547 in the circuit. but i hav used 2n2222 instead cause i had them lying around. Just check the pin out for the transistors you use. The the transistor is used as a switch.
I have used 100uf cap. You can use another if you have any. I have tried it with 10uf. The pulsing speed of LED changes.
Changing the values of the resistors also changes the pulse speed. Experiment with different values befor you build the circuit.
Step 3: Prototyping
Again you need basic understanding of electronics.
Follow the circuit diagram. If the circuit doesn't work check for loose connections on the breadboard. Check if the IC is held properly in place.
Watch video on youtube following the link or download it.