Holograms At Home Log
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- 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.
- 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
- 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
- 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.
- 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
- 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