Daft Punk`s Helmet
Transcription
Daft Punk`s Helmet
qwertyuiopasdfghjklzxcvbnmqwertyui opasdfghjklzxcvbnmqwertyuiopasdfgh jklzxcvbnmqwertyuiopasdfghjklzxcvb nmqwertyuiopasdfghjklzxcvbnmqwer Daft Punk’s Helmet tyuiopasdfghjklzxcvbnmqwertyuiopas dfghjklzxcvbnmqwertyuiopasdfghjklzx cvbnmqwertyuiopasdfghjklzxcvbnmq wertyuiopasdfghjklzxcvbnmqwertyuio pasdfghjklzxcvbnmqwertyuiopasdfghj klzxcvbnmqwertyuiopasdfghjklzxcvbn mqwertyuiopasdfghjklzxcvbnmqwerty uiopasdfghjklzxcvbnmqwertyuiopasdf ghjklzxcvbnmqwertyuiopasdfghjklzxc vbnmqwertyuiopasdfghjklzxcvbnmrty uiopasdfghjklzxcvbnmqwertyuiopasdf ghjklzxcvbnmqwertyuiopasdfghjklzxc 2012 Carlos Flores “Exhul2” Daft Punk’s Helmet First let me start by saying, this is not a novel project; this was created modeling the real Daft Punk’s helmet. I am a 10th grade student with passion for DJ’ing and last Halloween I needed a custom to enter the High School contest and the helmet came to mind. Also bear in mind that both of my parents are electrical engineers, hence I was not alone and I was hoping they would help me build the electronics and so they did. AND… Our effort paid off, due that we got some quality family build time and… we WON the contest. This was just a fun little sideproject; nothing that I thought would become popular. There might be some flaws, but hey, that’s inevitable. If you want an actual helmet, be sure you want to shell out $250,000 from Daft Punk themselves… Carlos Flores “Exhul2” Page 2 Daft Punk’s Helmet I will split the build in two main sections: 1. Building the Helmet 2. Building the Electronics for the Helmet SECTION 1: BUILDING THE HELMET Tools Materials Carlos Flores “Exhul2” Page 3 Daft Punk’s Helmet This is what we are going after. Don’t worry, it’s much easier than it seems It is best if you work on this in your garage or someplace where you don’t mind getting a little messy. Helmet Build 1. Gather/buy all necessary materials. 2. Start with the card board making the structure to define the new shape for the helmet’s visor (we used a dish that happened to have the desired size) then we cut two pieces of the same shape for the top and bottom of the visor. 3. Then we measured the chin and cut it from the card board. Carlos Flores “Exhul2” Page 4 Daft Punk’s Helmet 4. Once you have all cardboard for the support structure, assemble them as they appear in this picture. Secure the pieces together and onto the helmet using a glue gun. Notice that the three transversal pieces are temporal support; they will be cut off after applying the fiber glass. 5. Let the glue dry then apply some amount of foam onto the upper and lower visor. After the foam dries, shape it using the edge of the cardboard with a knife. (We used foam as filler, using only fiberglass will make the helmet very heavy). 6. Next, take your scissors and cut off about one-fourth off the bottom of a soda can. 7. Then glue the bottom of the soda cans onto the sides of the helmet. 8. Cut the fabric that comes with the fiber glass to cover all the card board, this with the catalytic following the instructions from the manufacturer, then apply the fiberglass to the helmet, especially to the upper and Carlos Flores “Exhul2” Page 5 Daft Punk’s Helmet lower visors (however, avoid the ears). Once the fiberglass dries, you will need to sand it to add smoothness and evenness. Repeat this step until you get the desired angle of the visor, using varying grades of sandpaper. 9. Continue applying fiber glass, let it dry then sand it to achieve the desired profile. 10. Apply automotive bondo mix according to the manufacturer’s specs, this is used to fill up any unevenness or flaws left by the fiber glass process, and start wet/un-wet sanding depending on the sand paper you be using, you will need to apply bondo sandrepeat until you get really close to the desired smoothness, this takes a lot of elbow grease but it’s fun,you can ask for help... Carlos Flores “Exhul2” Page 6 Daft Punk’s Helmet 11. Next, apply the chrome paint to the entire helmet, making sure it has an even coat. Follow up with gloss, for extra shine. (Be sure however, that your helmet is as smooth as possible) 12. Next, you must then measure the approximate dimensions of your helmet’s visor hole. Then use these measurements to cut out a visor out of the clear Plexiglas. 13. Before proceeding, make sure you have completed the electronics portion, as it is easier to fit the LED’s in the helmet beforehand. 14. Lastly, (Carefully) Use the heat gun to shape the visor in such a way so that it fits snugly into the visor hole of your helmet. 15. Remove the glass then we will apply the polarizing film. 16. Install back the visor now polarized and you can choose to secure the visor with the glue gun to the helmet if necessary. And that’s it! Carlos Flores “Exhul2” Page 7 Daft Punk’s Helmet SECTION 2: BUILDING THE HELMET’s ELECTRONICS: Ctty Description 1 MSP430 Launchpad 1 MSP430G2553 1 UDN2982 1 STP16DP05 1 500 Ohms Resistor 1 USB battery pack 256 RED 3mm LEDs 1 Fusion Core Board 1 Misc Wire Materials Part No Cost Tools Supplier $4.35 Allied Electronics $2.00 Allied Electronics $2.50 Allied Electronics $2.00 Allied Electronics $0.01 Allied Electronics $20 Allied Electronics Allied Electronics $11 Ohmselectronics This is what we are going after. Carlos Flores “Exhul2” Page 8 Daft Punk’s Helmet Helmet Electronic’s Build First some Theory: The helmet features a LCD banner consisting of 32 columns of 8 leds that is 32x8=256 LEDs, this banner is driven by the MSP430 Launchpad, this last has 14 generic I/O’s available, therefore in order to drive as many LED’s and to save power we will use multiplexing and the Persistence of vision peinciples. PERSISTENCE OF VISION: is the phenomenon of the eye by which an afterimage is thought to persist for approximately one twenty-fifth of a second on the retina. The myth of persistence of vision is the belief that human perception of motion (brain centered) is the result of persistence of vision (eye centred). The myth was debunked in 1912 by Wertheimer but persists in many citations in many classic and modern film-theory texts. A more plausible theory to explain motion perception (at least on a descriptive level) are two distinct perceptual illusions: phi phenomenon and beta movement. A visual form of memory known as iconic memory has been described as the cause of this phenomenon. Although psychologists and physiologists have rejected the relevance of this theory to film viewership, film academics and theorists generally have not. Some scientists nowadays consider the entire theory a myth. In contrasting persistence of vision theory with phi phenomena, a critical part of understanding that emerges with these visual perception phenomena is that the eye is not a camera. In other words Carlos Flores “Exhul2” Page 9 Daft Punk’s Helmet vision is not as simple as light registering on a medium, since the brain has to make sense of the visual data the eye provides and construct a coherent picture of reality. Joseph Anderson and Barbara Fisher argue that the phi phenomena privileges a more constructionist approach to the cinema (David Bordwell, Noël Carroll, Kirsten Thompson), whereas the persistence of vision privileges a realist approach (André Bazin, Christian Metz, Jean-Louis Baudry). The discovery of persistence of vision is attributed to the Roman poet Lucretius, although he only mentions it in connection with images seen in a dream. In the modern era, some stroboscopic experiments performed by Peter Mark Roget in 1824 were also cited as the basis for the theory Source: http://en.wikipedia.org/wiki/Persistence_of_vision MULTIPLEXING: Multiplexing is sending multiple signals or streams of information on a carrier at the same time in the form of a single, complex signal and then recovering the separate signals at the receiving end. In analog transmission, signals are commonly multiplexed using frequencydivision multiplexing (FDM), in which the carrier bandwidth is divided into subchannels of different frequency widths, each carrying a signal at the same time in parallel. In digital transmission, signals are commonly multiplexed using time-division multiplexing (TDM), in which the multiple signals are carried over the same channel in alternating time slots. In some optical fiber networks, multiple signals are carried Carlos Flores “Exhul2” Page 10 Daft Punk’s Helmet together as separate wavelengths of light in a multiplexed signal using dense wavelength division multiplexing(DWDM). Source: http://searchnetworking.techtarget.com/definition/multiplexing In Plain English: the LED banner/display is comprised of eight rows of thirty two LEDs, each row (32 bits) is refreshed 32 times per second, it would appear that all the rows (ie all LEDs) are on at the same time, but that is a trick our eyes plays to us, only one row is lit at the time but to our eyes it looks like all them are on, this is due to the Persistive Of Vision principle, Televisions use the same principle. What is an LED? A light-emitting diode (LED) is a semiconductor light source.[1] LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Introduced as a practical electronic component in 1962, [2] early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet and infrared wavelengths, with very high brightness. When a light-emitting diode is forward biased (switched on), electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence and the color of the light (corresponding to the energy of the photon) is determined by the energy gap of the Carlos Flores “Exhul2” Page 11 Daft Punk’s Helmet semiconductor. LEDs are often small in area (less than 1 mm2), and integrated optical components may be used to shape its radiation pattern.[3] LEDs present many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved robustness, smaller size, faster switching, and greater durability and reliability. LEDs powerful enough for room lighting are relatively expensive and require more precise current and heat management than compact fluorescent lamp sources of comparable output. Source: http://en.wikipedia.org/wiki/Light-emitting_diode Something to remember, this system is configured as Common Anode, hence Rows have all anodes from that row connected together and columns have all Cathodes connected together for each column. Carlos Flores “Exhul2” Page 12 Daft Punk’s Helmet Building the LED ARRAY: To build the LED array we will need to build a jig, to align the LEDs, the LED array will be a matrix of LEDs where all cathodes of the LEDs from each column are connected together and all the anodes from the LEDs from each row are connected together, that will produce an LED matrix with 8 row and 32 column connections. By measuring the window in the helmet we have approximately 8 ½ inches to place the DISPLAY, we will divide that length by 32 and spread the LEDs. Using the Drill and the 3mm drill bit, we create the jig. Carlos Flores “Exhul2” Page 13 Daft Punk’s Helmet This is a close up to the rows and columns connections We first connect the rows then create a special bend to connect the columns. Now to drive the system we will use serial to parallel shift registers, these have a serial input, a clock and a latch, and take serial data from the MSP430 and put it out on the 32 columns, remember we will be flashing a row of 32 bits at the time, the rows are enabled with an UDN2982 which is a source driver handled directly by the MCU, this Carlos Flores “Exhul2” Page 14 Daft Punk’s Helmet driver has 500mA source capabilities, the STP16DP05 are serial to parallel LED sink drivers. You could picture the system as below We used the Launchpad from Texas Instruments Carlos Flores “Exhul2” Page 15 Daft Punk’s Helmet And three fifths of the Core Fusion Board by Ohmselectronics ohmselectronics@tx.rr.com We cut the board on strategic places to keep the Lauchpad foorprint along with the UDN2982 in a single piece, then we cut the four STP16DP08 as single pieces, we will use only two of them, as shown. Carlos Flores “Exhul2” Page 16 Daft Punk’s Helmet The surface mount SOIC packaged ICs are easy to put on with standard soldering station. The MSP430G2553 is a DIP so can be just swapped on the Launchpad This is the final circuit. Carlos Flores “Exhul2” Page 17 Daft Punk’s Helmet The firmware for the MSP430 was developed by my dad using CodeComposerStudio (from TI) and C. Carlos Flores “Exhul2” Page 18 Daft Punk’s Helmet You should end up looking like this , The WINNER!! Carlos Flores “Exhul2” Page 19