We are proud to introduce kids to computer programming at the Philadelphia Science Festival (4/20/13) through Scratch, a program developed by M.I.T. For more information about downloading Scratch, visit, http://scratch.mit.edu/. For Scratch for Arduino, visit, http://seaside.citilab.eu/scratch/arduino. For Panther, a versatile variant of Scratch, visit, http://pantherprogramming.weebly.com/ or download it from our Dropbox here.
Aluminum Art Castings by Objects Unlimited
I really enjoyed presenting the Photovoltaic Workshop for the NKCDC but wanted to show the math I started. Hopefully a few attendees read this and benefit from it. Promised Links are at end of post.
A 16′x16′ patch of roof is equivalent to 23m, the sun produces 1Kw/meter/day but common modules produce at ~17%. This leaves you with 170 watts per square meter or 3900 watts total. If you consider various inefficiencies you will produce approx 3500 watts AC from that system.
3500 Watts at $7/watt installed is going to cost you $24,500.00. In PA you will only receive the 30% federal rebate and various minor incentives leaving you with approximately $16,000 overall cost. If you pay this over 5yrs compound interest at %8/yr your monthly payment will be ~$330/mo. The modules you install have a GUARANTEED lifespan of 25 yrs and Inverters generally have a 10-15yr lifespan. So after the five years of slightly higher than average payments the modules will be nearly free. They do need to be cleaned once in a while and inverters do occasionally go bad.
The more time you invest in and understand your system the cheaper and more effective it will be. If you have any questions don’t hesitate to email or call me. Good Luck!
Josh
Magazines
Material Sources
Information Resources
Design and Analysis Software
Do it Yourself (DIY) Alternative Energy
Documents and Articles
East Room Recording asked us to make a Quadratic Resonance Diffuser (QRD) cube for their sound studio. The result is a one-of-a-kind design which was proven by the client to diffuse extraneous sound.The QRD cube contains 31 rows with 31 1/2″ square rods measuring from 4″ to 16″. The design was developed from the client’s parameters and using the QRDude application that determined how the cube would diffuse sound.
Corner house designed for a Philadelphia developer shown during the construction process.
Hovercraft Thrust Propeller repair for Eddystone Fire Company in Eddystone, PA.
We first removed old blades in the hopes of being able to repair them. The dry rot was too extensive for salvage and the construction of prop would not allow for individual blade replacement. After some research we opted for a blank hub and blades from Hoverhawk. The original hub base would not come off so a fully custom adapter bracket had to be made.
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Design to restore historic facade on this town home for a Philadelphia developer.
Ducts made for a local aircraft company for a UAV.
Design for a local urban farm and farm investor. The design was created by Objects Unlimited using shipping containers and aquaponics technology to maximize productivity in a small urban environment (design only).
Design for an interactive monitor for a Philadelphia theater company (design only).
