There are a few spooky eye instructables out there. For example, there is one based on a 555 timer, one based on an on/off switch, one based on Arduino, and one based on tape.
I wanted to make a set of spooky evil eyes that met the following criteria:
1. Eyes that fade on and off (pwm)
2. Random duration of eye on and off times without using a pot or other input control to make the effect more realistic
3. Ultra low cost mcu so I can leave it in the decoration without having to re-program or re-insert the mcu.
4. Small controll/power box to make mounting easy
So here is how I did it, and I am pleased with the result.
At any point in this instructable, you will be able to make substitutions to fit your needs or materials on hand. If you like this, vote for it and if there are suggestions, I welcome all ideas to improve it.
Step 1: Spooky Materials and Tools Needed
5 sticks or pieces of wood for the base of the eyeballs
10 ping pong balls - white
High quality masking tape
Flat black spray paint
10 Red super-bright LED's
Solderable perf board
20 or 22 Guage Wire
Gel Super Glue
Super Glue Accelerant ---- this stuff is just plain useful. Now you have an excuse to buy some
Vinyl electrical tape -Black
4AA Battery Holder
4 AA Batteries - rechargable if you don't want to use a resistor
Drill & Bit
Breadboard & jumper wires
Needle Nose Pliers