Holograms At Home Log

1/29/17

• created first draft of the project proposal.
• explored alternate project possibilities, including displaying just on a cylindrical surface, removing inner led display volume, and making the display scalable.
• considered which components to use, settled on the stepper motor.
• considered using individual LEDs or strip LEDs, and settled on individual LEDs to ensure LED can be individually controlled and visible from multiple angles.

2/7/17

• switched LED to addressable LED strip due to limited number of ports on the arduino
• tentatively decided on about 10 layers of LED
• designed pole, arudino and battery layer, and first LED layer
• 3d printed designed layers
• modified project proposal
• redesigned pole to be hollow so wires can be held inside the pole
• redesigned layers with tolerance on connecting parts

2/14/17

• ran test on the strip LED with Arduino mega, confirmed that each light can be controlled individually
• determined that motor controller and separate arduino was required for motor, and added components to the budget
• arduino battery layer failed to take into account the size of the ports on the arduino mega; fixed design and reprinted
• 2nd LED layers printed

2/21/17

• finalized budget: switch from AA to D batteries, switched to buying 3 led strips, removed wires and electrical tape from budget
• tested motor, torque and rpm too low. Possible cause is 9v is too low.

2/28/17

• got motor speed to around 10 Hz with 24v 2amp power source
• wired led strips, mounted to frame, and powered Arduino Mega with 9v battery
• programmed Arduino Mega to display semicircle on first layer at around 6Hz
• printed base for the motor
• added hall effect sensor and magnets to budget

3/3/17

• Tested the Hall Effect Sensor for more accurate display time (at low speed and high speed)
• Coded Arduino functions to display LED more accurately using the Hall Effect Sensor
• Wired the second layer of the display
• Discussed the work flow over the Spring Break

3/20/17

• mounted led to 2nd layer of device
• printed 3rd led layer
• printed 4th led layer
• motor driver burned out during motor test
• began coding for controlling device
• created library for images using 3d arrays
• created algorithm for displaying spheres with varying radius, xyz offset, color, and duration of display

3/27/17

• created library for displaying cylinder with varying radius, xyz offset, color, and duration of display
• created library for displaying rectangular prism with varying sizes, xyz offset, color, and duration of display
• designed protocol to switch lights on strip based on angle of display device
• printed layers 6,7,8
• wired leds to layer 6,7,8
• wired hall effect sensor