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This interactive display responds to a person's smile. A camera searches for faces then detects smiles and takes a photo. In this mode, an LED on th...
This is the setup--a camera detects a smile then a microcontroller operates two servo motors and LED's for a defined time period. That's it.
Voltage across a resistor/photocell pair changes when the amount of light striking the photocell changes. This voltage is provided to the LPC 1768 (mi...
Analog voltage input (the camera has detected a smile) is received on pin 20. Pin 26 (Santa's eyes and LED1 on the processor module) is activated for...
Let's start the construction by cutting a disc from 1/4 inch thick plywood as shown in the template above.
The disc should look like this.
Using wood screws, attach a 3/4 inch by 3/4 inch by 3 inch back support brace.
Attach a 2 foot long piece of aluminum trim channel (channel is made for 3/4 inch plywood and is available in building supply stores) to the back supp...
Attach a 6 1/2 inch long by 3/4 inch by 3/4 inch block of wood to the disc adjacent to the slits.
Attach a 3/4 inch by 3/4 inch by 4 inch pice of wood centered on the last piece you installed.
Insert another 3/4 inch by 3/4 inch by 6 1/2 inch piece of wood on the last piece installed.
Using small wire (like magnet wire), connect two of the servo hubs (included with the servomotor) so that the radial distance from the servo shaft to ...
Drill a 3/8 inch hole in the disc, between the board assembly and the back support. Wires from the servomotors will go up through this hole then down ...
Using the tiny screws provided with the servomotor, attach the motor to the wood block assembly.
Attach the second servomotor to the other side of the block assembly.
Drill two 1/4 inch holes (separated by 4 inches) near the front of the disc. The "eye" wires will pass through these holes. Attach a 12 inch by 24 i...
From a string of LED Christmas lights, remove two lights to work as eyes. I chose blue stars, but globes ar any color of your choice will work. Sold...
Cut a 3 7/8 inch long piece of acrylic rod (1 inch diameter--I used the clear handle of an upscale toilet plunger).
Using a screw, attach the rod to the aluminum support channel--11 inches from the top.
Drill a 1/4 inch diameter hole in the top and center (connect the holes) end of the rod away from the aluminum support.
Cut a 6 1/2 inch long piece of "eyeglass strap holder" (or any flexible tubing) and attach the center to the acrylic rod with fishing line.
Using a needle, thread fishing line through the ends fo the tubing and tie the ends of the fishing line to the ends of the servomotor hubs.
Using a breadboard (or your preferred method) wire the LPC 1768 as shown in the schematic drawing. *I was using a battery supply and oscilloscope to ...
Using another acrylic rod, attach a beard assembly 3 1/2 inches below the mouth rod.
Twist wires from the power supply to the breadboard wires.
Tape the wires with electrical tape so that they don't bump together and short out. Use a Sony DSC TX1 camera and the Sony Party shot base (and Sony ...
Cut a small square of Velcro and punch a hole in the center. Attach the adhesive side to the party shot base (hole should allow the white LED to shin...
Attach a photocell to the other side of the Velcro square. Stick the two pieces of Velcro together, making sure that the photocell is aligned with th...
I inserted small screws into the end of the "smile tube" so that gravity would pull the ends of the smile downward.
When you stand in front of the camera and smile, Santa's eyes will glow and his smile will rise. Adjust the software (servomotor positions) until you...
This works--but there is still a problem. The party base rotates left, right, up, and down. You can't depend on the base being pointed where you wan...
Remove two screws from the "tilt" plate.
Pull the party base camera socket away from the tilt mechanism.
At this point, if you are smart and take my advice, you will cut, nip and otherwise destroy the top of the party housing to get it away from the camer...
I had to "force/slide" this cable back under a tiny spring loaded connector. I really thought I'd bought the farm, but it works.
Bolt a piece of U shaped tubing to the camera socket. Place Velcro on the bottom of the party base. Cut a 2 1/2 inch diameter hole in a piece of acr...
Adhere the base to the acrylic such that the rotating part of the base can rotate freely. Secure the aluminum channel/camera socket to the acrylic up...
Using a 2 inch by 2 inch block of wood, attach the acrylic upright to a 12 inch square acrylic base.
Almost done. Line the camera lens up pretty much in the center of Santa's face. Plug the Sony AC power supply into the party base. Attach the Velcro...
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Posted:
Apr 3, 2011
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