Panel model consists of a simple step-wise linear model of a solar panel.See the above figure.1. Constant Current : up to 18 volts 2. Constant Power : between 18 and 19 volts 3. Power decline linearly to zero : between 19 and 21 volts 4. Zero Current...
With $49 spent on the cells, I still need the following to finish the panel:about 2.5 m^2 EVA (STR 15420P) encapsulant (ebay)about 1.25 m^2 of TPT (Tedlar-polysomething-Tedlar) backing (ebay)about 1.25 m^2 of fluoropolymer (or other suitable) front sheet...
The newest Hackaday Prize Hot List is about human interfaces, so I decided to work on that a little over the weekend. I found an analog joystick module lying around, so I'm going to try and make a custom controller for Tote.---------- more ----------First...
I cut a sheet of plexiglass to use for a backplane. The Pi, hub, breakout, etc were all mounted with standoffs and 4-40 hardware. The backplane was then mounted to the cabinet in the same way. This looks like it'll be a really nice way to keep everything...
UPDATE V: Here's a demo using a TTL input as an example of my original "weird circuit" in useNote that by varying the input-voltage to greater than about 3.65V, the circuit's very similar to mine, current flows from the base through the collector. And...
since there were a lot of problems in dealing with the x0.8 derived version of the original design in inventor, I had to think of another solution.this solution is to create the NEma17 hole dimensions multiplied by the factor 1.25 so that when a 0.8...
Since I decided to use a 4S LiFePO4 battery in my previous post, I’ve been looking online for charger design resources and examples. From what I gathered from several sources, I’ve come up with what I think is a circuit that will work for charging the...
There's a bit of cleanup of the edges due to the print quality, but, I have a COMPLETELY modular design now. I think a better printer will produce better parts and make life much easier.That's 3 Pi Zero slots in 1.25 x 4 inches. THESE will require a...
Here's the second half of the design notes on the card. I've hopefully covered most of the design decisions made, but if you've got any other questions, feel free to ask.SoftwareClock software is written in C using Atmel Studio 7.0, and compiled with...
Hello, there! As Keeley previously mentioned, I am going to be posting about the KickBox we received in late January. Using our KickBox money, we purchased BigRedBee's 100mW 70cm BeeLine GPS to help us with tracking our full scale rocket during its flight....
The system has a lot of modules to keep track of now so I've made an overview diagram showing how they're all connected. I'll keep this updated as new modules are added. I've decided to drop the design goal of an entirely wearable system. The power glove...
Pretty simply, I had originally built my goKart out of metal I bought at Home Depot. The way it worked was that it had one drive wheel (rear right when facing the back of the Kart) and one wheel with a drum brake (rear left).The Kart was doing close...
I have done some initial layout work, with the intent to build a model in the near future. It looks like the boards will be about 2" by 1.25" without going to highly exotic parts. At quantity the boards would run about $6 each. At prototype quantities,...
It works as it should but I don't know why.Here is the source code for Falstad :$ 3 0.000001 0.34903429574618416 58 3 43 R 696 16 696 -16 0 0 40 4 0 0 0.5 w 808 352 808 384 1 w 808 192 808 176 0 w 584 176 584 192 0 w 664 96 592 96 3 w 808 288 808 256...