April 05, 2006
LEDs as PhotoDiodes
LEDs as touch
current limit to increase response time
mitzubitshi paper
use ultraviolet leds
LEDs as outs :
A pins - dig
A pins as OUT
switch other column
LEDs as ins:
A pin: analog
A as INs
Switch other column but the other way
Posted by min at 06:15 PM | Comments (0)
April 03, 2006
PlasmaIonSpeakers 04.02.06
Todd had made a perf-board version of our latest preamp circuit. However, it simply would not work. Turns out that one of the chips had blown up. After replacing this piece, we were able to get perfect sound, just like on the breadboard. We even attempted at pumping out stereo sound and it worked great.
We will continue to develop our own circuit board. We need a louder sound. But the quality of the sound is much better than the preamp module that was provided.
Posted by min at 01:12 PM | Comments (0)
March 27, 2006
PlasmaIon Speakers DriveBy 03.23.06
Posted by min at 02:58 PM | Comments (0)
March 23, 2006
DriveBy Prep 03.23.06
Current P&I preamp Module
Experimenting with new amps, SSM2019_Self-Contained and TC7660S, Voltage Convertor.
View in IE for ppt
PlasmaSpeaker film cutting instructions
PlasmaSpeaker FilmSpeakerAmpRelated
Posted by min at 05:59 PM | Comments (0)
March 21, 2006
Latest Circuit using the Voltage Divider
Posted by min at 11:56 PM | Comments (0)
March 14, 2006
The Latest Circuit
We need to fit everything on one board.
Posted by min at 10:16 PM | Comments (0)
March 08, 2006
PlasmaSpeakers Breakthrough 03.05.06
Our first try of trying to rebuild the preamp module did not work out so well. We attempted at using different capacitors throughout the circuit.
We met up this past Sunday and reworked the Analog Devices SSM2019 Audio Preamp Chip. We were constantly getting crackling sounds from the chip until Chunxi played around with the resistors and got some great sounds out of the audio out. This chip alone can replace the preamp module that Plasma had provided us with. The volume is not as loud, but we can include a transformer to this to get a louder volume.
Posted by min at 09:20 PM | Comments (0)
February 20, 2006
Plasma Speakers Update
Materials have been shipped. Should get here next week sometime.
The COO is sending me 2 separate preamp modules to test with.
Helium filled ballons with the speaker film!
Posted by min at 08:03 PM | Comments (0)
February 08, 2006
PlasmaSpeakers 02.05.06
Ideas
We need to build a smaller yet an efficient stereo preamp that would be scalable depending on the size of the film. Alice, Tracy and Todd, very serious...
Posted by min at 10:09 PM | Comments (0)
January 31, 2006
PlasmaProject Update
Todd, Tracy and I tried to figure out the preamp box tonight. We opened one up and looked up the part number and found out that they were using a separate preamp component used for car sound systems!
We're going to try and build our own preamp boards soon. We're a little confused about the transformer section, but we believe that this does not play a very important part in the whole setup.
We'll be using the preamp component instead of trying to build our own using the LM386s.
We'll be meeting again to discuss about the project and what kind of first application we could come up with using these.
Interesting read on the film speaker.
Posted by min at 10:14 PM | Comments (0)
January 22, 2006
Preamp and the Plasma
Got to figure out the preamp part.
Posted by min at 06:39 PM | Comments (0)
January 20, 2006
PlasmaIonSpeakers Tested
Todd H and I tried out the 2m sheet that I brought back from Korea. The cool thing about these is that the sound changes as one bends the sheet, changing the EQ as you play around with it.
See here for their website.
As of now, the COO of the company has agreed to give me 1m for $100. If you get the sample set, it's $150 for the film and the preamp box and the power supply. When only the film is ordered, it comes in 35cm in width and whatever length. The sample film is about 10" by 8". I'm sure that we could build the preamp part and experiment with different ones to get different sound qualities out of them. When the film is bent, it produces a louder, more fuller sound.
I will email him and let him know as to how many people are interested in purchasing. Let me know how many meters you would like to purchase.
Email me if you need more details.
min.lee@nyu.edu
Posted by min at 12:23 AM | Comments (0)
January 19, 2006
USB PIC programmer, melabs
Exchanged my serial usb programmer with the USB one that's just come out of melabs. It is on its way!!!
Our latest PIC® Programmer is driven and powered from a single USB port on your computer. No additional AC power adapter is needed. The programmer is recognized by Windows as an HID (Human Interface Device) rather than a virtual serial port, simplifying driver installation.
The programmer consists of two parts. The programmer board is specifically designed for In-Circuit Serial Programming (ICSP). An adapter is included to allow the programming of DIP-packaged PICs from 8 to 40 pins. The programmer is compatible with the complete line of Programming Adapters. This allows you to program almost any ICSP-capable PIC in almost any package.
The new design is small and compact. The programmer board measures only 1.5" x 2.3". A dual color LED indicates programmer status. The connection to the computer is via a standard USB cable (Type-A male to Type-B male).
Posted by min at 02:31 PM | Comments (0)
December 26, 2005
Plasma Ion Speakers Video
Went into the Plasma Ion company yesterday. The COO of the company gave me a long demo of about an hour, explaining the uses. The plasma films can be cut up into different shapes and used. Some cell phone companies in Korea are looking into using speakers that are as little as a fingernail to put on the phones. Some French Sound Artist had done a piece, using huge sheets of these on ceilings.
I got to meet the CEO and the inventor of Plama-Ion Sheet Speakers, Suk Geun Go.
Posted by min at 08:46 AM | Comments (0)