Search for grow lights in Topics


LED Grow Lights

The Rundown... Ok, well, I was looking into writing an instructable (assuming that I can assemble it myself) on how to make your own LED grow light. I've got a few hours of research in to it and I was trying to figure out the most cost effective to way to build my own... ( I know it's normal to spend $300 on a grow light but I just can't justify it. :-/ ) Does anyone out there have any experience with different wavelengths or can anyone recommend locations/LEDs to buy? The little bit of information that I have as of right now is all single source so anyone with a bit of experience would be a lot of help. Thanks!

Topic by ZacDiggity    |  last reply


LED Grow Lights

I've been an avid rosarian for many years, and am finally getting around to trying to grow miniatures indoors. I've been looking at some of the commercially available LED grow-lights, and they're insanely expensive, not to mention bulky and unattractive. It occurred to me that a lot of the info here would be highly relevant to such a DIY project. What I'm wondering is how many LEDs would be needed to produce around 2000 lumens in an approximately 1-foot square for one rose? I'd gladly listen attentively to anyone who can comment on this with some degree of authority.

Topic by Cavallo    |  last reply



LED Grow lights for indoor plants?

I have a lamp with a couple of multi-color changing LED light bulbs and I was wondering if any of the red/blue combination settings would work well for growing plants indoors? This is a photo of the type of bulb I have.  I have a couple of non-edible plants that I got at a craft store and I was just wondering if this type of bulb would work well and help them grow since I can't get these plants into direct sunlight.  Thank you Instructaverse! 

Question by tklene    |  last reply


What kind of board/setup would i need to control lighting power and add timers??

Im quite new to electronics bought a bunch of capacitors/resistors/diodes etc like a year ago with 2 picaxe 08m kits and a breadboard and never touched them since i bought them. Was wondering what kind of board i would need that could control lighting duration with a timer for my indoor "tomato plants" From my current knowledge im pretty sure an arduino board would be best. Help would greatly appreciated and a link to some tutorials about electronics would be very helpful too. Sorry for my grammar I'm not a native English speaker.

Question by MahFlower    |  last reply


Need help with DIY LED GROW LIGHT

Hello people, i have never made led light before. i bought 3w led chips from ebay. 3 colors. red, deep red and royal blue. also bought led drivers 100w. i wired led-s by google)) and twhen connected this driver they dont turn on . i tried 1 led and of course it burned on this driver but when trying more leds it doesnt light up at all. what is the problem? can anybody help me? thank you

Topic by GiorgiM15    |  last reply


LED and wiring help :D

I am planning on making a small plant grow light for a locker but could use some assistance with some electrical components and wiring. I wanted to run a fair some of LEDs off of a battery to help grow a plant in an otherwise enclosed space. I need to find an appropriate arrangement so that I am not changing batteries all the time. I would also like the lights to turn on and off every 12 or so hours. How would I go about setting up the LEDs but even more than that how and what would I use to set up a battery powered timer?

Topic by evilghostbat  


Grow a plant in my locker?

Currently, this is an idea, and i am simply expanding on it. I had this great idea, mostly as a joke, why not grow a plant in a spare locker? I am currently a high school student that goes to a small school, and have way too much time on my hands. As i was looking at the empty lockers we have from students who left, or even just spares, an idea hit me. Why not put one of these lockers to good use? Why not put a plant inside of it, that can sustain most if not all of itself? Have a gallon of water in there, along with an arduino and a moisture sensor, that would end up watering the plant. I would also have an artificial light source to provide light, preferably LED. The hardest bit is the power. All of this would run off of either a SLA battery or two, or maybe a drill battery. I could swap the battery once every day, which means it would need to go for 24 hours without stopping. That, and the weekends, which would be three full days. I first thought about mushrooms, or other dark growing plants, but i find that boring, lacking a challenge. besides doing this just for jokes, i have also wanted to try out the idea of growing a plant fully indoors without the use of natural sunlight. I have never done this, so please feel free to bombard me with recommendations. Again, this is only an idea. I can only assume it's possible. Also, recommendations on parts and methods would be sweet. Some type of light that can be powered on 12-24v, and run off of a SLA or maybe even a lawnmower battery for minimum of 3 days. Also, plant. I was thinking a tomato plant? Some species that doesn't grow taller than 2.5ft? Anyway, that's the idea. If you guys could help with ideas, provide recommendations, or point me in the correct direction, that'd be sweet. Last note, i would like to keep this cheap. I am not going for some extreme garden or anything. Just a single plant, in a semi-self sustaining locker.

Topic by RocketPenguin    |  last reply


What is the best kind of light to use when growing plants indoors without any sunlight?

I am wanting to grow a plant or two in my basement, and was just curious what the best artificial light to use is and how to go about doing it.

Question by CowGuy    |  last reply


What LEDS do I need to make a "Grow Light" for growing plants and vegetables indoors? 110V & 12V. Thanks! Answered

Indoor Grow Light for plants and hydroponic gardening.  I need both 110Volt and 12 Volt schematics for out off grid home. My LED knowledge is very limited so I need the specs on the LEDS.

Question by GrumpyOldGoat    |  last reply


what would be the right amount of l e ds to grow a plant ie. how many and what type of rating/ luminum's???

If you know how many batteries would be needed to power l e ds    but im sure i can fig  that out if i know how many  le ds  to grow a plant  thanks buda

Question by andybuda    |  last reply


Will this light work to grow plants in my homemade greenhouse? Answered

I am working on a homemade greenhouse and I wanted to use a solar light, I found one for pretty cheap at harbor freight: http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=95573 will this work to help my plants grow? or does it have to be a certain type of light? thanks

Question by davej6694    |  last reply


What veggies grow well in very little light? Answered

I am moving into an appartment with a decent sized patio, where hanging plants would be spectacular, if it weren't for the fact that we are on the bottom floor, and facing north. there is almost no light throughout the day. Does anyone know any fruits or veggies, or heck, even herbs, that grow in next to no light?

Question by cyc4015    |  last reply



Hello everyone!

Hi there, I’m Frances P. Frazier, a newbie in this forum site. I’m looking forward to gain new friends here.

Topic by dormgrow08    |  last reply


What type of LEDs are used for grow LED lights?

I've been googleing about the advantage of LED grow lights and how it saves energy and how they last longer. After looking to buy them I realized they were very expensive. However, I also found a few do-it-yourself guides which I thought were pretty neat and straight forward. The only thing I didn't see was if the LEDs they used were special or just any red/blue led lights can be used. Hope to get an answer and save a few bucks but most importantly save energy, Thanks in advance !!

Question by monchito7    |  last reply


Please need help with diy led grow light.

Hello people, i have never made led light before. i bought 3w led chips from ebay. 3 colors. red, deep red and royal blue. also bought led drivers 100w. i wired led-s by google)) and twhen connected this driver they dont turn on . i tried 1 led and of course it burned on this driver but when trying more leds it doesnt light up at all. what is the problem? can anybody help me? thank you

Question by GiorgiM15    |  last reply


Growing roses from seeds

I have a pair of nice, perfumed roses that are getting quite old now. This season one of them produced a nice fruit containing 8 seeds. It is a light pink variety and I also obtained some seeds from a white perfumed rose. Last time I did this was with my grandfather and I was still a little kid LOL The common way of multiplying your roses is by grafting them onto a fresh stem of some wild or low quality roses. The reason for this is quite simple: A "manufacturered rose" is usually designed to look pretty and show certain other features, but not be a strong plant. When using seeds it all comes down to how strong the original mother rose was, not the stock it was crafted on. In some cases you end up with a little bush rose in other cases with something that grows so high that the stem will break in strong winds. But for the lucky few cases that do work good you are paid off with a beautiful new rose. For next couple of weeks the seeds will stay in the fridge to aid germination but if it works out I will take pics of the progress and document it all in an Instructable - but it will be about a year to finnish as roses grow slow from seeds. If I don't forget it again I will also show how to graft one rose onto another to get a bush with different varieties in one.

Topic by Downunder35m    |  last reply


Ideas for small light-grown indoor mini gardens?

 Im looking for an idea similar to the new "light-grown  aerogarden" type things that i can grow right in my room. Its quite dark and not really appropriate for growing things in, and the aerogardens are expensive. can anyone help?!

Question by melisschampagne    |  last reply


how do i beef up a yard light to grow a plant?

The yard light will be just to give light for the plant for night ... batteries charged by day.... if i added an extra solar cell to the yard light and connected more batteries to be charged would this do... how many  l e ds to grow a plant? how many batteries to power these  l e ds would i then need a relay to switch the power back in the morning i really have not thought enough about this so ... any help and ideas would be nice.....???

Question by andybuda    |  last reply


Can I grow tomatoes (and other vegetables) in part shade (4-5 hours)?

I've recently moved into a new house (I'm not telling you where) and the backyard only receives 4-5 hours of sunshine per day. I'm wondering if my vegetables requiring full sun will still grow? I'm tired of seeing the same old "it must have at least 6-8 hours of sunlight each day" . If this is still not possible then I will consider a hydroponic system with growth lights under my stairs... I was always interested in hydroponics ever since I saw an advertisement for the AeroGarden, but I never actually tried to build a system and I definitely can't afford one.

Question by awang8    |  last reply


LED Gardening

I heard somewhere that you can use LED lights to grow plants. is this a substitute for the sun? does it work well? (i know, dumb question =P )

Topic by gummyfun    |  last reply


Sodium grow light ballast to car dc-ac inverter. Can it be done ?

Story be this my friend. I have a few 1000watt grow light inverter/ballasts. Turns out i can't afford the electricity needed to run these. Soooooo I'm wondering if i can convert them into a dc-ac inverter. For use in a mobile home or in my car for....something I'll figure some use for it. Could also just be a fun project. Point being Id like to see these re purposed for something useful. I didn't pay much for them (lucky thrift shop find) And i dont want to use it for running lights on 12v or whatever. Thats all i can seem to find on this subject in google. And i can solder and very well..i think. 

Topic by williamb349    |  last reply


Will painting a swimmimg pool a dark color promote algae to grow more than a light colored painted pool?

I am picking a new color for my inground swimming pool with filter no heater. Wanted to change to color from a basic light blue to a more modern darker color.  Was told dark colors allow algae to grow more than light colors.  Any truth to that statement?  Also because the pool is not heated which color would help keep the water warm?  I am guessing that a dark bottom pool would be warmer than a light bottom pool.

Question by cindybcin    |  last reply


Colored Lights- How do colored led lights work and what do they emit?

I'm doing an experiment by growing plants under colored led lights, so do led lights emit specifically one color. For example does a red led light emit only wavelengths of light that are red and no others. I want to make sure that only one color of light is existent to get accurate results. I hope this makes sense. Also if you know of any 1-colored high watt led lights please link them to me.

Question by Potapids    |  last reply


led help

im looking to make an led growlight. yeah yeah its not for what you think. its for my college plant bio class. i want to make a strong growlight for my semester project. im looking to make something like the 90whatt ufo like http://www.amazon.com/LED-Wholesalers-2506RBOW-Quad-Band-Hydroponic/dp/B002TZ6I14/ref=sr_1_4?ie=UTF8&s;=home-garden&qid;=1281669139&sr;=8-4. the problem is i dont understand leds. ive seen the high power growlight on this site but im looking to make a large panel with regular leds. someone help. please.

Topic by mas9779    |  last reply


Indoor LED plant lights

I am new to posting in the forums, and actually am not even sure if this is being posted in the right area. My name is Ryan, and I need some help. I have been growing spices/herbs for my own recipes for a couple years, and have always used artificial lights. I use a whole wack of those spiral florescent lights (The 23watt ones to replace a 100watt light bulb), and it works alright. I now want to create a panel of LED's so that I can increase my lumen count, and therefore increase the rate of growth. I need help with how to use resistors to get the power to what a 50 LED panel would need. LED: wattage: 1 watt Forward Voltage : 2.1V~2.3V Forward Current: 300mA. ATX Power Supply: Wattage: 250 Normal 120 volt Canadian power I want to make a panel that has 50 1watt LED's in it, power it from a modified 250watt ATX power supply, and if possible, power more than one from a single PSU (Power Supply Unit) (Something like a quick connector setup, have all resistors panel side, and have cords running to the PSU where it uses quick connectors) I want to use the PSU because I have three at my disposal. I was thinking that it would only need 50 watts or something, and I could wire it in series, however I don't know what resistors to use, or where to use them, to make the power work for the LED's. I can wire thing together, solder, and have a basic understanding of circuitry (Like power flows this direction, and this will do that...... don't know numbers)

Topic by MaXoR    |  last reply


Arduino can control the temp, humidity, light, CO2 into my greenhouse?

Hello, can anyone tell me if Arduino can control in a greenhouse these parameters? - temperature - humidity - CO2 - light ..? I need for a temp, humidity rate, CO2 rate and so on the Arduino activates different tools in my greenhouse. Thanks!

Topic by NeroInferno    |  last reply


How do I power my 50 red 3-watt LED's and my 20 blue 3-watt LED's without using resistors to make a panel?? PLEASE HELP

I am no electrician and am having no luck searching the internet on how to power the LEDs. I am trying to build a grow light with 50 - 3 watt Red LED lights and 20 - 3 watt BLUE LED lights. The total power consumed would be 210 watts. Specs for Blue lights: DC Forward Voltage (VF): 3.2 Vdc ~ 4.0 Vdc DC Forward Current (IF): Typ 650mA Specs for Red lights: DC Forward Voltage (VF): 2.0 ~ 2.8 Vdc DC Forward Current (IF): Typ 650mA I know a lot of things on the internet call for resistors but for this project, resistors would give off far too much heat. I know that an LED driver can be used in place of the resistors, but I don't know anything about voltage or amps. I have found a few 200W LED drivers that connect to an outlet and convert the power to a 24V DC, which is usable by LED's. I just don't know if that's all I have to do: connect the driver to the LEDs in a parallel circuit. Actually, I don't know how to find the Constant Current Module that I need at all. PLEASE HELP ME!

Question by ammakrom    |  last reply


What kind of light is the best for indoor gardening and what are the cheapest options? Answered

I have a small indoor seed starter/green house and it is standing in the warm part of the house (65-70 degrees). I would like to grow some herbs (rosemary, basil, majoram, thyme, oregano and start some lavenders for planting out later). I know it is difficult to start rosemary from seeds but the others should be fine. Which lights are the best ? Can I use an old Christmas light (white light not the one with many colors) How many hours of light is sufficient? Thank you

Question by SzilviaP    |  last reply


Computer controlled timer

I am building an indoor hydroponics room to grow herbs and tomatoes year round. I would like to be able to control the lighting and the water pumps with my computer. Any ideas? Thanks!

Topic by InsaneLunatic    |  last reply


What plants can/should i use for my steam-punk light bulb terrarium?

I decided to build a light bulb terrarium and took a steam punk spin on it using pipes as the base. What plants can/should i use that will grow up the through pipes(only 2 or 3 inches tall) and still look nice in the bulbs?

Question by HUMUNAHA    |  last reply


What is the best way to power 25 red 3watt LED's and 5 blue 3watt LED's with a 100w LED constant current source driver? Answered

Please excuse me as my technical skills are not as good as I would want them to be :D So, I am trying to build a grow light with this setup: 1. 25 red 3Watt LED's - DC Forward Voltage (VF) : 2.2-2.8Vdc - DC Forward Currect (IF) : 700mA 2. 5 blue 3Watt LED's - DC Forward Voltage (VF) : 3.4-3.8Vdc - DC Forward Currect (IF) : 700mA 3.100W LED Constant Current Driver http://www.dx.com/p/waterproof-100w-led-constant-current-source-power-supply-driver-100-240v-146055#.VRh4f-HkWqg Power: 100W; Input voltage: AC 100~240V 50/60Hz; Output voltage: DC 8~12V; Output current: 8A (label on the box says: 12V 8A) What would be the best way to wire the LED's for maximum efficiency? I'm thinking somehow in parallel, but how exactly? Thank you.

Question by voltskaterzb    |  last reply


Help about homegrown crystal

I want to grow a crystal which is something written inside it and when you put some light on it, text will reflect on wall. is it even possible? any idea about how to do it guys?(also ladies :D)

Topic by ashbazg    |  last reply


i need some help with My science fair project ?

I picked my sci project and have been working on it for 3 weeks now my subject is what habitat does basil grow the best in? my variables are 1 controll plant put in sunny area with regular amount of water 2 poluted water plant 3 LED light source and good ventilation plant 4 encanced water plant with artificial food in a dark box with a crack of light and my partner Melrose is doing what type of water do plants grow the best in types of water she is testing Tap distilled pure spring

Question by albylovesscience    |  last reply


Is there any budjet software to make electronic schematics that can be placed in other documents, and to generate pcbs?

I may wish to send someone a copy of a electronic schematic or even prepare an "Instructables" offering. And the ability to make a resist template to produce circuit boards would be great. I am a bit of a novice, and haven't worked in electronics in quite a while. But now I have some ideas to pursue. I have experimented with different color mixtures of led grow lighting for pepper plants and wish to make some of my own Led arrays, which would be more suitable for seedlings to be set outside. Thanks Owen oshaifer@cox.net

Question by cebadobe    |  last reply


Wiring high powered leds.

How can I wire 60 2.5v ,350mA and 20 3.5v ,350mA leds. The 2 different leds can have seperate power supplies? Trying to build a grow light for indoor vegatables. Thanks for any help

Question by realkoolkat    |  last reply


Fluorescent Plants

Recently I presented a science teacher in my school, Mr. Zhang with the idea of growing plants with tonic water which contains quinine to see if they would glow under a black light. Today we saw that these bean sprouts had defused and taken in the tonic water, as a result the bean sprouts were fluorescent under the black light. I first chose the mung bean / bean sprout because I know that bean sprouts are translucent and it would be easier to see the glow, but now I want to find out if the seed will take in the quinine, and if so would the quinine be in the flesh of the plant at all. Another test that Mr. Zhang and I were considering was to use a tonic water in a hydroponic system to see if the plants utilize the quinine. Dr. Paul Williams suggested that I grow fastplants in the dark, because their stem is translucent is grown in the dark. (Mr. Zhang knew him from a workshop he did involving fastplants) I'll be updating this as I continue the study, I'll start growing very soon, as soon as I order the supplies that are necessary. The picture below, is of two mung beans, the one on the left took in the quinine, and the one of the right is normal.

Topic by astrozombies138    |  last reply


[newsletter] Flux Capacitor, Bike Blender, Grow a Pineapple...

Sign-up for our newsletter here. June 5, 2008 Welcome back! We launched our Lonely Planet Travel Tips Contest. Share a great travel tip and win some fantastic photo books as well as guidebooks, phrasebooks, and t-shirts! The Discover Green Science Fair for a Better Planet Contest closes for entries this weekend! Submit your Instructable soon to win the Celestron SkyScout. The voting has closed for Park Tool Bike Month. Check back later today to see who won! Check out these cool Instructables! DIY Flux Capacitor Get ready to go back... to the future! 1.21 gigawatts not required. posted by sponges on Jun 3, 2008 How to create a bike blender for less than $25 When the love of biking and the love of smoothies come together it can be a beautiful, and tasty, thing to behold. posted by I_bike on Jun 1, 2008 The Conetenna - a wi-fi antenna The quest for improved wi-fi continues with this massive cone variation of the cantenna. posted by Shadetree Engineer on Jun 1, 2008 How to Grow Pineapples Pineapples are easier to grow than you think. Get a pineapple and some dirt and you're most of the way there! posted by woofboy111 on May 30, 2008 Japanese lamp from recycled materials A cheap but attractive paper "shoji" style lamp that uses mostly recycled parts and is easy to put together. posted by PKM on May 29, 2008 How to make an Iron Man Mask Whether you're stuck in a cave or have some time at home to build, these instructions will help you get that superhero look. posted by msraynsford on May 30, 2008 Repainting an Old Bicycle Want to keep your old frame looking good as times and styles move on? A new paint job is likely in your future. posted by Dr.Paj on Jun 1, 2008 Etching brass plates Adding some brass adds a bit of class to your project. Learn to etch and you can include a sweet custom finishing touch. posted by gotang on May 27, 2008 Win amazing LED POV kits! What have you done for robots lately? Closes for entries this weekend! Handy Bike Mods and Projects This collection of things to do to and with bicycles will provide plenty of ideas for your next two-wheel project. posted by TimAnderson on May 30, 2008 Illuminated Keyboard Hack Turn your ordinary keyboard into an illuminated one for under $5. This is an easy keyboard mod that takes about a half hour to do. posted by Kipkay on May 30, 2008 Bike Generator Attach a generator to the rear wheel and power up both the front and back lights. Never worry about the batteries dying again. posted by dbc1218 on Jun 1, 2008 Zigzag Pop-Up Here's a quick pop-up that only takes a few minutes and has a nice effect. All you need is a printer (preferably color), paper, and something to cut with. posted by fungus amungus on May 30, 2008 Now go make something awesome, and I'll see you next week! - Eric

Topic by fungus amungus  


How do I power my LED's?

I posted before with unknown specs on the lights, but I now have the specs. I have 50 Red LED's and 20 Blue LED's that I would like to make in an array for a grow light. I was thinking about gluing them with thermal glue on flat aluminum bars that are 2 inches wide in a rectangle with about 1 inch spaces around them because I don't have heat sinks. I think they would be able to dissipate enough heat if I use them in conjunction with a fan. Here are the specs for the red lights (50): 2.4mV forward current 700mA blue lights (20): 3.2mV forward current 700mA If I'm correct, I need 84 watts for the Red LED's altogether; 44.8 watts for the Blue LED's altogether: combined wattage of 128.8 watts. Previously, I stated that these lights were 3w, each. But I would rather save life on the diodes and run them at this lower power because they still give off a great amount of lumens. Can anyone give me some directions on how I would construct this array? (what drivers to use, how to wire the LED's together, and how I could make the system plug into my wall outlet (standard USA socket)). THANKS!

Question by ammakrom    |  last reply


Computer programming help needed

 Alright so since it's cold and impossible to grow my vegetables in my garden outside, I came across The Cheap Vegetable Gardener and he gave me the idea to use an old pc and turn it into a grow box. What I wanted to do was put a webcam or a camera in there and either  a) have it automatically take pictures every couple hours and stop when its lights out time. b) have it "streaming" where I can check it on my computer when I'm on the go.

Question by Mccall101    |  last reply


LED Reef tank light ( auto dimming)

I am in the process of redesigning a LED reef light using Luxeon III White and Royal Blue. These will let my coral grow the best. The biology of it I have down to a science... My circuitry however is still in its infancy. I have been following several of the instructables but i am at a point where I need some help... I can kind of get to the simple on off in my schematics (given I do not know what my power supply is yet) but as I read in Circuits-for-using-High-Power-LED , I now see that it can be a little more complicated if I want to preserve these slightly costly lights... So that leads to many questions from which most I might be able to get from the 12 books on electronics I purchased and borrowed, but something tells me that experienced people might have more practical solutions for me. What is needed to operate a 24 led array (Luxeon 3, Vf = 3.9V, 1000mA Each LED) from 115VAC to the DC? Now for a topic that I am having trouble with finding information to, back in the day I had an electronic ballast for a metal halide reef light that would fade on to full output over the course of 2 hours and would dim the same when turning off. this ballast had to cords on to supply constant power( i would assume) and the other to control the switch that would allow it to fade on and off.... I would like to simulate this sunrise sunset effect with my LED array? I appreciate your time and help with this project of mine.

Topic by Aquatope    |  last reply


Using a 1500mA LED driver to power 1400mA of LEDs?

    I am building a light panel to grow lettuce indoors and need some help. I am relatively new to electronics and trying to learn. The LEDs are: Max. Forward Voltage: 3.0-3.6V Max. Forward Current: 700mA The LED driver: DC20-39V 1500mA +-5% I have done the calculations and will be using 20 LEDs in 2 strings with 10 LEDs in each resulting in 1400 mA at 36.0 VDC. So I bought the LED drivers stated above with the current knowledge i had. But after learning about Constant Current LED Driver, I'm not so sure anymore as the LEDs will not draw what they need, instead be supplied with a constant 1500mA. Am I correct to assume that the LEDs will be fried driven in this configuration? Is there a way to make it work or is the only option to buy a 1400ma LED driver? Many thanks!  

Question by Stumpe    |  last reply


LED Math Help

I want to create a LED grow light but i am having trouble with the math. I have 5 blue LEDs that are 3w( Vf: 3-3.4 v and If:700ma). Now i want to wire these in a series. So if i were to use two of these for example, would it require more volts and the same current. So: 2@3v = 6v @700ma. 

Question by Lord_Tryndamere    |  last reply


Parallel circuits question

I am trying to make an LED grow light and I have an electrical question. I want a simple light grid, but I am not sure on the math. I understand how to calculate a the resistor needed for a series circuit with a power source and several LEDs, but I do not grok the math for parallel circuits. Can all of the parallel series equal the total voltage? Do I just add the amps from all of the LEDs to figure how many series I can run parallel? Or am I completely off track? Thanks for the help!

Topic by karhas    |  last reply


Need some answers on oranges... Answered

This summer (I think, I really cannot remember) I set up a propagator to grow some bamboo seeds I bought off eBay- Instructable coming soon on this topic- and then off the success of my bamboo seeds, I stuck a few orange seeds in as well. They grew alright, they're pretty huge now and I just re-potted them today into new, higher quality soil etc. Whilst doing this I discovered that each seed (I only had to successfully grown seeds) had spouted two saplings. So when re-potting I found out I didn't actual have 2 strange orange saplings but 4 of them with totally independent root systems. Albeit Two out of the four had not been receiving as much light as the others so there are two huge dominant saplings and the two smaller ones that grew in their shadow.  Is it normal for orange trees to grow two sprouts from one seed? I haven't tried growing them before so I don't know. Or have I got magical seeds, or a divine calling to grow plants? ;) Any help would be great,   Tom

Question by thomas9666    |  last reply


How to create a self-managed vegetable garden ?

Hi everyone !*** Long introduction *** My name is Romain, I'm french, sorry beforehand for my bad English. I'm a systems and network engineer and I like to create and design things to improve my day-to-day life. One of my main concern is about what I eat everyday and I think sometimes it's overly complicated to respond to simples questions : is it a good or a bad product ? is it good or bad for me ?.. To solve this problem I try to learn things about nutrition, how to cook well (without losing a lot of nutrients for example), what are healthy products etc. In France we try to learn to people to eat fruits and vegetables (with a leitmotiv : "Manger 5 fruits et légumes par jour" / "Eat 5 fruits and vegetables a day") OK. But how are fruits and vegetables grown? with pesticides, chemical fertilizer, etc. :-/ Not cool at all ! Best solution : buy fresh organic products. But it's still more expensive than other (logically). So another solution : grow your own food *** Short introduction *** My name is Romain, this is the summay of my thinking : want to be in good health ? -> eat good food want to eat good food ? -> grow your own food My project / idea : Create a thing (rack, table, or whatever) to grow my own food (aromatic herbs, some vegetables, fruits) everyday, all year round. Some constraints :cheap but solidmovable (go indoor or outdoor) / lightweight / can be taken to pieces (-> plant pot on the one hand and rack on the other hand)self-sufficient in waterelectrical need only in winter (indoor) / low power -> LED light to help grown for darkest daysre-usable (no disposable component)scalable (possibility to create another same "thing") to multiply size of the gardenIdeas :Have a water storage in the top of installation (not too high, to be "easily" filled) but on the top to use gravity to water the plantsHave some specials lights to help plants growing when winter is arrivedHave wheel to be movableHave sensor to be (a little) connected, for me, not a specialist of cultivation, like light sensor and humidity sensor => which would drive the water valve and light power on/offMy little flat will not allow me to be self-sufficient in food, but to have some precious ingredient for everyday cooking.So if anyone had the experience of doing all or one part of what I thinking about, I'm open to all suggestions or recommendations. Thank you, Have a nice day !

Question by Romain042  


How to use an old freezer/fridge as a garden box or fish pond? How would you establish drainage?

Not that I have space for such here at home, but thinking along green lines and how to recycle old appliances. I know my grandpa had an old freezer he used that was converted to a mini green house wiht some grow lights, but I was thinking more along the lines of container gardening or fish pond.

Question by tbeatty    |  last reply


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Topic by fungus amungus  


I need to make a world map on a wall with small led lights to show some cities, can somebody help me with this project?

I have a world map on the wall and I need to put a small led light (3mm or less) in many cities of the map, using different colors. I have NO idea how to do it, actually I don’t know anything about electronics, so I need like a completely beginners step by step guide, something like “dummies” :- )) Also I might need to add quite lights in a future, so I need to do something that can easily grow in the amount of led’s needed. I am sorry my English is not that good, hope you understand my needs. I don’t know what kind I need to get, how to connect each one, what power, etc. Any idea or any help will be kindly appreciated. Thanks a lot!

Question by frineped    |  last reply