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![[Under Construction]](images/undercon.gif)
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Cave Eyes
This is a little microcontroller circuit that has 15 pairs of
L.E.D.'s that look like rodent eyes. The pairs of eyes blink in a
semi-random fashion. So, what you end up with is 15 pairs of eyes
staring out at you with one pair blinking (looks like the animal had to
close their eyes briefly) at a time. The pairs of eyes are on
wires so that they can be placed around the cave, bushes, etc.
Runs off of 4 AA batteries.
Click the following to see how to build this project:
schematic,
code,
circuit
board layout, and parts
list
For completed units or kits of parts, please go
to:
Cowlacious
Designs
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Schematic for Cave Eyes Circuit
NOTE: Pins 18 & 19 are connected on the schematic. It is kind
of hard to see, so I thought I had better point it out.
Parts List
| D1 - D30 |
LED's, I used Red, but you could make different pairs of
eyes different colors. You also might want to try using Ultra High
brightness LED's if you really want them to show up.
See my LED
design page if you have any questions on how to hook them up.
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| R1 - R15 |
470 Ohm Resistors, 1/4W |
| U1 |
74HCT154 |
| U2 |
PIC12C508 microcontroller, must be programmed with the
code shown below. |
| V1 |
AA x 4 battery holder. The unit runs off of 6 volts,
so any six volt supply will work. I use AA battery pack of 4
batteries. The positive lead should go into the hole on the board
that connects to diode 31. |
| D31 |
1N4001 or any like silicone power diode, i.e. 1N4002,
1N4003, 1N4004, etc. |
Microcontroller Code
Click on the microcontroller
to download a zipped file with the code for that microcontroller.
PIC12C508
PIC12F675
The code for the 12F675 is the newest version of the code and gives the best
effect. The zip file the hex file necessary for programming the microcontroller.
Circuit Board Layout
Click here
to see the circuit board layout. It is done as a PDF file so that if you
want to print it and use it to make your own board, it will keep the proper
aspect ratio etc.
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Cowlacious
DesignsTM