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Raspberry Pi GPIO Expansion Cable from a Used IDE Cable
Installing a water tank heating element in a Polar Ware 321BP 32 Quart Stainless Steel Brewpot
Under Kitchen Cabinet LED Strip Lights for Under $30.00!
Sturdy Bench Seat without cutting a Single Board
Thanks for the idea. God instructable. I have a B+ with 40 pins. I made my breakout cable from an old 40 pin IDE cable. I dug out the blanked pin socket. I preferred not to use a breakout board, instead I just use dupont wires at the outer end. I will label the pins by sticking a printed label on either side of the connector end. Haven't done that yet. Here's some pics of the cable.
Build your own Stainless Steel RIMS (Recirculating Infusion Mash System) Tube - Round 2
Add Solar Powered LED Lights to a Harbor Freight 45 Watt solar panel kit
Grow High Light Plants Indoors Without Hydroponics
How to build a kegerator kit or homebrew kegerator from a Sanyo Mini-fridge
Build Rustic Planter Boxes from Recycled Fencing
Adding a Harbor Freight 45 Watt Solar Panel to my Storage Building
Build a Beer Kegerator Tower Cooler to keep your Kegerator tower faucet cool and help prevent foamy beer
Homebrewing - Brew Kettle BTU Calculations
Build your own portable Stainless Steel RIMS tube - and the whole thing only weighs only 17 lbs!
Stainless Steel RIMS Tube Element Rust Fix
Explain to me why I'm wrong? I was just explaining current flow which does all the work.And the center tap neutral is just as 'hot' as the other two legs, it's just referenced to earth ground so we have no current flow between neutral and ground. For example, if one of the 120V legs were tied to ground instead of the center tap and you touched neutral you would definitely feel a 120V shock. This is because now that 120V leg would be referencing ground. Also, the other 120V leg would now be 240V from "ground".
Buying Low Volume Parts from China - the Right Way
Start your charcoal grill with a Propane Torch
Tom, you are wrong. Voltage is merely 'potiential' or the difference between the lines. In AC, neutral - which you clearly understand is tied to ground and therefore constant - does nothing but provides the basis for the potential from hot. If neutral were tied to ground AND moving... think about it. Plus, why the hell would they call it NEUTRAL!!!??? You're example of the Edison (rich man's Tesla, but a different discussion) connection may be correct but you are trying to explain it while not understanding that HOT does not mean POSITIVE. Being AC, the hot flips between positive and negative creating the aforementioned potential in both directions. It seems that you are stuck trying to understand it as +/-.
Assembling my Harbor Freight 45 Watt Solar Panel Kit - No Tools needed!
Thank you for your quick reply and the advice. It really helps!
Protecting your outside dogs from the cold
You should be able to use a larger battery for one of these solar panel kits, but "how large" I don't know. This is because the real limitation is the total amount the solar panels can charge your battery between uses and how much energy you use between charges. But even if you pull more from your battery than you charge, a larger battery might still be to your advantage. For example, you could leave home with a fully charged marine battery and bump the charge every day with the solar panels, extending you usage a couple of days. Tom
Thanks so much for making this Instructable. I bought this same kit and an inverter from Harbor Freight to take camping. Your Instructable not only helps with the setup, it does a good job of putting everything into perspective, giving me an idea of what I can expect to get from this kit.I'd like to take advantage of your knowledge, since it seems you know a lot about this topic and ask you some questions: Could I use a multi-battery setup with this kit for longer lasting power? If so, how many batteries do you think this kit could support? I've seen were people have used multiple batteries to power their house and I am considering doing something like this possibly someday and am curious if this kit could be used toward the start of doing something like this.Thank you in advance for any help or information you can provide!
Build Your Own 3120 Lumen LED Grow Light
I read your full instructions AND all the comments with some interest. I have a PhD in physics and a new interest in grow lights. Specifically , I want to provide some extra light to a terrarium in a north facing spot in my house that receives only a small amount of indirect sunlight. An important point here, often overlooked or sidelined, is that these lights produce a light that is more pleasing to the (human) eye. Whenever mentioned it has been a case of 'but the human eye is different to a plant's needs', but I am interested in simultaneously pleasing both my plants and my eyes! Sure, it must be true that by concentrating power output to the specific wavelengths that are used in the various photosynthetic processes must result both in better plant growth and lower operational cost, but such lights have the drawback of making the room look like aliens are visiting! That might be fine in a basement or cupboard for certain types of horticulture, but it is not going to cut it in my dining room! The discussion here about LUX vs. Lumens is very true (i especially enjoyed the tangent about rays of sunlight being almost parallel by the distance of the Earth - something I assumed in so many problems I solved at uni!), but being a physicist, the photosynthetic response curves were completely new to me. Now I assume that the various elements of photosynthesis evolved long before the current variety of plants and these peaks in absorption (as indicated on the graph posted by 'Redbinary') are the same across the diversity of plant species? i.e. Algae, moss, flowers and vegetables all have very similar peak absorptions in the red and blue that are often quoted here and elsewhere.From what I understand about photonics (e.g. from the photoelectric effect) is that so long as some of the photons are in the energy range needed for absorption (chlorophyll A & B absorption peaks), then the light will have some effect on the plants. Increasing the intensity of photons at these wavelengths will increase the effectiveness of the grow light but with the drawback that the emitted light becomes less aesthetically pleasing. However, if the intensity of the whole spectrum were boosted by the same amount, the intensity of PAR photons increase, yet the overall light remains white(ish) but gets brighter. What is potentially of worth here then, is that it MAY be possible to deliver enough red and blue wavelength (PAR) photons to benefit the plant but where the other wavelengths, far from being useless, result in a light which isn't painful to look at! Given the low cost of LED lighting, I'd pay a bit extra for the light and room to look nice, especially since I have very limited space and only one 18 inch square terrarium to illuminate - my considerations for a nice room with healthy plants are very different to those of a commercial grower who wants maximum yield at minimum cost and it seems that many of the detractors on this post are in the latter category. Such disagreements are like comparing apples to oranges. So, rather than saying this light is for reading or other tasks (as suggested in one comment), so long as these LED lights provide some photons at the wavelengths of interest, you could say it is a 'supplemental to natural light' grow light. Only experimentation will tell you whether or not the number of white LED fixtures necessary to noticeably boost growth would result in a set up so bright that your room looks like a floodlit stadium!With the last comment being some months ago and it now being the height of summer, I hope that you have been able to test out these lights and that you may be able to let us know whether your set up provided a high enough intensity of photons at the key wavelengths to have an effect on your plants.
We used to own a whole computer in a keyboard. It was called a Commodore 64!
single 100 watt panel 5 amps $120 home depot vs 45 watt 1.9 amp for $200
cool must try one for the back. thanks
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