PDS / lead or lead-free solder?

Soldering the led matrix together.

Suddenly, soldering iron tip stops getting hot. Uh-oh… tips oxidized

Progress halted till new tips

Googled “how to prevent soldering iron tips oxidation”

Found the lead vs lead-free solder

https://www.quora.com/What-are-the-disadvantages-of-lead-free-solder-vs-lead-solder

Energy Final / Chakra Lights

For my energy final, I will build a little buddha statue out of concrete with acrylic rods and LEDS embedded in it. The statue will have a flexible solar panel embedded in its back and will have 7 lights (corresponding to the 7 chakras) inside it. It will gather light during the day (from its backside) and project them through its chakra lights on its front by night. This design was inspired by the concrete & light work of Amitabh Shrivastava.
The sculpture will be an energy sufficient art object meant to be placed with its backside toward the sunlight. It is designed for the top floor of my house, which receives a good amount of indirect sunlight during the daytime. I will house it at ITP’s east window, where our group housed our midterm solar project.
POWER BUDGET FOR PROJECT
KEY ELECTRONICS
7 neopixel LED pixels
1 Arducam PRO Mini Atmega328 Development Board
Calculations:
  • For 7 neopixel, estimated at 20mA/pixel at normal usage x 7 pixels = 150mA. At full brightness this is 60mA x 7 pixels = 420mA
    • Watts = Amps x Volts
      • at 60mA estimated draw: 0.43A x 5v = 2.15W for the lights
      • at 20mA estimated draw: 0.15A x 5v = 0.75W
  • For Pro Mini: 4mA minimum requirement (from https://learn.sparkfun.com/tutorials/reducing-arduino-power-consumption)
    • Watts = 0.004A x 5V = .02W
  • TOTAL POWER BUDGET: For 20mA calculation per LED, total is 0.02W (for pro mini) + 0.75W (for 7 neopixels) = 0.77W
  • TOTAL POWER BUDGET: For 60mA calculation per LED, total is 0.02W + 2.15W = 2.17W total load
KEY COMPONENTS TO POWER ELECTRONICS
6V 1W Panel (to order)
https://www.amazon.com/Fexible-Solar-Charger-Photovoltaic-yellow/dp/B01JZKF74E/
3.7 W 1200mAh Battery (I already have this):
http://tinkersphere.com/batteries-holders/2139-37v-1200mah-lipo-battery.html
5V Charging battery board (to order)
https://www.amazon.com/SMAKN-Lithium-Battery-Charging-Charger/dp/B00HJNX0DU
datasheet: https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf

Future Scenarios / Concept Maps

Concept Map showing flow of action of Steve Bannon’s “Culture War”. Here, “Radical Political Actors” can be defined as elements grouped under the “Alt-Right”. The arrow direction shows the manner in which effectation was enacted.

Concept map of how the role social media played in the Egyptian Revolution (2011):

By contrast, here is the concept map of the dynamic of political repression vis-a-vis democracy activists in the pre-social media Mubarak era:

Concept map of Russian interference in the US Political System 2014-present:

 

PDS / April Update

POWER

I initially waited to construct the new LED matrix until I had a grip on the power requirements. My old board was 2240 LEDs running from a 5V 70A 350W power supply, although it just good enough (I know this because when I run the whole thing at full white, it flickers). However, even as I type this I become unsure of my knowledge — Eric Rosenthal told me that when white LEDs turn yellow that means too much current. Overall, my deficiencies in understanding electricity is something that I wished to address, and measuring power requirements for the new board was a means of doing so.

I started out by scheduled a meeting with Eric Rosenthal, power guru of ITP. He recommended that I first find the “peak instantaneous  voltage” of my old LED board by connecting a 1 OHM resistor and using Ohm’s Law to calculate exactly what is the amperage that I require. The different patterns that I displayed drew different amounts of current, depending on how many LEDs were on and what colour the LEDS were.

However I didn’t really do a good job at measuring the current this way. The first 1OHM resistor I used was a tiny one, and when I made the circuit in series, nothing happened. I used other resistors and mostly, nothing happened on the board since there was not enough current. One resistor smoked and I suspect I blew other resistors also.

Later, after consulting with Jeff Feddersen, I learned that different resistors had different Wattage. I would need a much heartier resistor to do what I needed. However, even using 5W and 10W 1OHM resistors in the ITP shop, I still could not calculate what I needed. Time kept ticking and I just wanted to start making the damn thing.

So I decided that if my current power supply worked for a 2240-pixel LED matrix, it would definitely be enough to work on a 1850 and 1900-pixel LED matrix, since I decided to do it in two modules.

PROJECTION SURFACE 

I put up the metal L brackets according to plan and the paper was not as tight as I wanted. The thin part of the L bracket could be the culprit. Next steps on this will be to use nails with big heads to increase surface area that sandwiches the paper.

POWER ON THE SIDE

From previous experience I know that each LED strip needs its own connection to the power supply, rather than running the power through the entire strip (which does not do the job). However when I was using a stiff piece of plywood to mount the LED strips to, I could just staple the 12 AWG wire to the board and everything wouldn’t move, including the solder points.

But since I am using a flexible piece of vinyl, I face the challenge of needing a stiff 12 AWG wire soldered to each LED strip, however it needs to be attached to the flexible vinyl. Something stiff attached to something flexible. I consulted Ben Light on this. After the consultation and two hours of deep visualization while sitting on a display rack in Home Depot, I decided upon a low tech solution: I would staple a piece of plywood to the back of the vinyl with heavy-duty staples. And I would staple the 12 AWG to it too. Just like on the old board.

PDS – Vectorsworks and New Lightworks

Immediate goals for PSD class on 14 Feb

Learn basic usage of vectorworks – make new lightwork interation on vectorworks

New Light Works:

  • will explore the use of aperture with LEDs
  • will involve three layers: bed of LEDs, aperture layer, projection surface
  • bed of LEDs will be for multiple project uses (including my XYZ project) so it will be made on flexible, transparent material. Probably vinyl.
  • aperture layer to be simple: black tape on clear plastic: probably vinyl.
  • projection surface will be X material, which has already been purchased.

To buy:

  • roll of vinyl

To design:

  • framework which holds all three elements

Plan, Goal, Vision, Dream

 

[immediate] PLAN (2-3 week timeframe): 

  • to build next light investigation tool (following the findings of my Pcomp final)
  • to experiment with this tool and then… wait for further instruction

GOAL (for project development studio – 3 month timeframe):

  • to continue my investigation into image creation with light using concepts developed during PComp and before ITP.
  • to have three or four good works to approach galleries by the end of the PDS
  • to have a better understanding of light’s properties through investigating it
  • to advance my understanding of of light as an artistic medium

VISION (1 timeframe): 

  • make 2018 my first run at galleries in the spring-time
  • make mistakes and errors and adjust my approaches in 2019 and 2020. (2020 is my final year I can be in NYC under my current international student visa).
  • make a name for myself with my light works
  • to make works and breakthroughs that surprise even me
  • to ride the current wave I am riding until its very end

DREAM (3-8 year timeframe):

  • to wake up every day and do what I want to do
  • to successfully transitions to a career as a artist.
  • to remain true to my vision without being a fool
  • to benefit humanity in some way
  • to position myself to be able to start a family