Intro to CAD: Difference between revisions
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* Use clear vinyl tubing and corks in the end to house the circuit board, and tie wrap it to the spokes on your bike. |
* Use clear vinyl tubing and corks in the end to house the circuit board, and tie wrap it to the spokes on your bike. |
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* The [http://www.kingbrightusa.com/images/catalog/SPEC/APT2012SECK.pdf LEDs we purchased] are 20 mA with a forward voltage drop of 2.3 volts, and there are some restrictions on the currents you can draw from the ATMEGA328P shown [http://wiblocks.luciani.org/FAQ/faq-atmega328-pin-current.html here]. |
* The [http://www.kingbrightusa.com/images/catalog/SPEC/APT2012SECK.pdf LEDs we purchased] are 20 mA with a forward voltage drop of 2.3 volts, and there are some restrictions on the currents you can draw from the ATMEGA328P shown [http://wiblocks.luciani.org/FAQ/faq-atmega328-pin-current.html here]. |
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====Kicad Libraries==== |
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* [https://github.com/mcous/kicad-lib/blob/master/components/freescale-ic.lib MMA8452Q Accelerometer EESchema library] |
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* [http://people.wallawalla.edu/~Rob.Frohne/ClassHandouts/Intro_to_Cad/MIC5205.lib MIC5205 Voltage Regulator EESchema library] |
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Revision as of 10:57, 12 February 2014
This page is for the Intro to Engineering ENGR 122 EE/CPE Section
Two Dimensional CAD
- DraftSight is an AutoCAD clone. Presently it is rather like AutoCAD 2006 or 2007.
- Orthographic Projection (Front, Side and Top View) Drawing Tutorial
Persistence of Vision Bike Light Project
This project will use a 3.3 volt Arduino Pro Mini clone that you will design the circuit board, housing, and software for. Persistence of vision is a psychological effect that allows you to see two dimensional images that were created by one dimensional flashing LEDs. Here are some similar projects:
- This is video shows some POV projects from Japan.
- Arduino on a breadboard spinning with a motor.
- Another spinning POV display.
- Simple Code for a simple POV device using the Arduino.
- Another simple Arduino POV device with understandable code.
- A POV wand with 20 LEDs, and fairly understandable code.
We will have an MMA8452 accelerometer that communicates via a serial I2C interface. The accelerometer will measure the angular acceleration, which will allow the velocity of the bike wheel to be calculated. This will make it possible to flash LEDs at the proper time intervals to spell words, draw pictures, etc., as you ride your bike down the road at night.
The power source for your POV device can be two or three AA, or AAA batteries. You need to design the packaging. Some suggestions that you can consider are:
- Use clear vinyl tubing and corks in the end to house the circuit board, and tie wrap it to the spokes on your bike.
- The LEDs we purchased are 20 mA with a forward voltage drop of 2.3 volts, and there are some restrictions on the currents you can draw from the ATMEGA328P shown here.