Help me find this?

Hi im from Johannesburg South Africa im looking for one of those barrels in this ible https://www.instructables.com/id/How-to-Build-Your-Own-BBQ-Barrel/

Question by Lesedi 8 years ago  |  last reply 8 years ago


Extending Competions to SA???

Are there any plans of extending these competitions to South Africa?

Topic by Zeo123 5 years ago  |  last reply 5 years ago


Can I take part in Instructables' contests although I live in South Africa? Answered

I'm a legal citizen of South Africa. Can I take part in contests?

Question by Fathomlis 3 years ago  |  last reply 3 years ago


where can i buy Altoids in cape town south Africa?

Question by FatimaH1 4 years ago  |  last reply 4 years ago


Getting Teenage Cash

I am 14 and currently living in South Africa. The problem with South Africa is it's major security issues. I could only do the "traditional" (Mowing lawns, babysitting) with family friends, but the problem is in South Africa all families earning above a certain amount are required to hire a maid and a gardener, so that removes all of the "traditional" methods of earning money.

Topic by BOOM5601 9 years ago  |  last reply 6 years ago


Do any of the Contests ever Include South Africans as eligible for entry ?

Just would like to know if the contests ever include South africans as Eligible to enter ?

Topic by Creative Hacker 5 years ago  |  last reply 5 years ago


Can you enter a contest if you live in South Africa?

If you win, can they send the prize to SA? I really want to enter competitions, but I'm not sure...

Question by awessels 5 years ago  |  last reply 5 years ago


HEY,am here to help you understand swahili to english

Free English to Swahili translation. Translate English to Swahili online

Topic by tuzajohn 4 years ago  |  last reply 4 years ago


hi people please help me

Ok heres what i have to say.well i read on the net that americans just throw their phones away when it breaks but in south africa we fix the phones.sn please im asLl are making south africa a safer place for your own good.i will fix the cellphone's and sell it for the price it cost me to fix it so more south africans will be able to afford to own a phone

Question by Salesh 10 years ago  |  last reply 10 years ago



Rat/Rodent extermination?

Hi  I live in South Africa, and checking Lifehacker and Instructables I get no joy on searches with either of these terms, I am wondering if you States siders have them?

Question by pierre_in_Benoni 7 years ago  |  last reply 7 years ago


International entries

Good day.  Unfortunately South Africa is not on  your "allowed to participate countries" list. Can We still enter a contest - and use our family in Canada to receive a prize  ( if any  :-)  for us? 

Topic by Domoreto 5 years ago  |  last reply 5 years ago


Idea to Store Solar, or Wind Energy in Tanks in Central, South American, Africa

 I go to Togo, West Africa, and they already use, or need the black water tanks. they can have the water pumped using solar, windmills, or rope pumps, then allow it to fall, and light their houses with LED lights, and charge their cell phones. So what do you think, anyone have experience using these cheap hydro generators? Do they work? Do they last? Is there enough water pressure? Thanks, Andy Lee Graham https://www.hobotraveler.com/blogger.html

Topic by hobotraveler 1 year ago  |  last reply 1 year ago


How to identify mushroom / fungus growing in watermelon pot.?

  The medium used is coco peat from south India. The fertilizer used is organic seaweed imported from South Africa. I want to know whether its an infestation or beneficial for my plant growth? THE PIC:http://www.freeimagehosting.net/uploads/f6196f211f.jpg

Question by charmneo 8 years ago  |  last reply 8 years ago


FIFA Day 1 Group A results

Day 1 of the FIFA South Africa world cup 2010 is over. Every team in the group has a chance to enter the finals as both games ended in a draw. Game 1 South Africa 1- Mexico 1 Tshabalala       Marquez Minute 55        Minute 79 Game 2 France 0- Uruguay 0 Personal thoughts on Game 1: South Africa has really surprised me with their skill. I really expected Mexico to win but the South Africans have proven me wrong. South Africa had a slow start but close to half time they started to play really well. Mexico had a very hard time penetrating their defense. Mexico had a higher percentage of ball possession and showed to be a tough competitor. In the second half things started to warm up with the first goal made by Tshabalala in the 55th minute. Mexico countered with a goal by Marquez in the 79th minute to even things out. Overall a great game. Good luck to both teams. Personal thoughts on Game 2: This game was very interesting although I thought the coaches of both sides made some mistakes. IT was pretty even the whole way through but Uruguay was being pretty tough on the opponent giving them several yellow cards and a red card. Personally I think the french coach should have put Thiery Henry in the game much sooner. A great game from both sides. Good luck to you aswell. Feel free to leave comments regarding these games and teams. 

Topic by Tornado96 8 years ago  |  last reply 8 years ago


Copper Crystal Metal

Hi, Please assist. I am looking for ways to create copper crystals from copper sulfate liquid by using chemicals only. I found a company in South Africa that's doing exactly that.

Topic by CrystalCopper 6 years ago  |  last reply 6 years ago


LASER CUT THROUGH TWO LAYERS OF CARDBOARD FOR SILHOUTTES

Hello from South Africa, Is it possible to lasercut through cardboard (2 layers) to sandwich colored silkpaper in between for suncatchers? Regards, Barbara

Topic by BarbaraC9 3 years ago  |  last reply 3 years ago


Designers Wanted: Join a Think-and-Make-Tank for Soul of Africa

Oxford University's Said Business School is running a sort of Peace Corps for designers. Writes Lucy Kimbell, Clark Fellow in Design Leadership: We need up to 10 designers who want to use their design practices and skills to help social enterprise Soul of Africa tackle some of the challenge facing it, during a one-day workshop in Oxford in collaboration with MBA students. The workshop is a participative, creative "think-and-make-tank" that brings together people from management and from design to use visual methods to analyze and tackle specific problems identified by an organization. MBA students from Said Business School will be joined by designers from different disciplines to help social enterprise Soul of Africa engage with key challenges. Soul Of Africa is a charitable initiative and a self-sustainable project created to facilitate employment and funding aimed at helping orphans affected by AIDS through the sale of hand-stitched shoes. Unemployed and unskilled women in South Africa are trained to hand-stitch shoes, giving them the self-empowering ability to feed their families and provide them with essential health care. Download more details here. What we are looking for Designers (recent graduates, current MA or BA design students, and design professionals) are invited to take part. Ideally, we'd like a mixture of people from these backgrounds: - visual communication - product/industrial design - service design - interface design - fashion - design management How to get involved To apply, send an email to Lucy Kimbell at lucy.kimbell@sbs.ox.ac.uk to arrive on or by Friday 20 March 2009. The email must include - your name and contact details and any institutional affiliation - your design discipline (eg product, visual communication) - up to 150 words on why you want to participate. Successful participants will be contacted by Friday 3 April at the latest. Reasonable travel expenses to Oxford (standard class return, UK travel only) will be reimbursed to those who attend the workshop, on the production of a receipt.The Design Leadership blog is here.Via Core77

Topic by noahw 10 years ago  |  last reply 10 years ago


is there any way to receive a contest prize if you live in a unlisted country

I live in South-Africa and my country never gets listed on the contest country list, I just wondered if there is a way to ship the prize to here?(the prize winner will be paying the shipping costs)

Topic by spodeopieter 6 years ago  |  last reply 6 years ago


I'm looking for a ardunio? Answered

 hello instructables I am looking for a ardunio i live in cape town in South Africa  and i am not ok with buying 1 over the internet. I would be a lot happier buying 1 from a store. I've been looking for 1 for a few months now please help

Question by lj123456 9 years ago  |  last reply 9 years ago


why does the sun have a halo today?01/11/2010 Answered

In south africa this morning (johannesburg) the sun has a halo,its very beautiful,does anyone know why? Local opinions have varied from ,water vapour to something to do with jupiter to the end of the world is here,any ideas?

Question by afridave 8 years ago  |  last reply 8 years ago


Petrol and LP Gass (home gas) Engine

Hi, I am in South Africa and recently had a conversation with someone who tells me that one of our security companies runs their cars on a mixture of normal petrol(gasoline)and house gass as a test to get cheaper mileage.Does anyone know how this can be done?

Topic by Leon Jacobs 10 years ago  |  last reply 10 years ago


Trapping water frogs

Hi my name is Werner I am from South Africa, and a very enthusiastic angler (freshwater). I wonder if anyone can assist me with regard to a cheap and simple way to  make  my own  frog trap to trap water frogs, as I use these frogs for bait when targeting catfish. Any ideas and assistance will be appreciated. 

Topic by Werncor 9 years ago  |  last reply 9 years ago


I am busy with DIY Electric Vehicle in Cape Town South Africa, I need some input?

I am a Motor Mechanic for almost 30 years and I want to change to Electric Motor Vehicle. But I want to construct a Cheaper Method of ConversionI have already designed and configured my drive line to attain high speed using Low power input. I am using a light Motor for the Conversion AC 3.7KW Motor with 3.5 Amp Single Phase. I am also designing  the Alternative Charging Controlling mechanism to and input controller to top up the Batteries.  Using only 6 x  12v 100 am Batteries, I know its low but the Motor will be consuming such low power that it would not need extra Batteries.  Now my question What Electrical components,  Required  I am using a 12 v 1000 w Sinewave inverter, with wellsee power control  now setting up the Curtis Electronic Pedal for the variable drive, what mechanism can I use and disconnecting the power in high speed and switching to the alternative power source. Any suggestions.  

Question by ymallie 6 years ago  |  last reply 4 years ago


Ultimate mint tin mod thing ideas

I recently got some Penguin mints from the US (I live in South Africa) and I had an idea, I want to make the ultimate mint tin mod/kit. Basically I'd like to get some ideas for various things to include or ways to modify the tin so it'll be useful in the most number of situations.

Topic by Soulsmith 9 years ago  |  last reply 9 years ago


What to do with an old pc case? Answered

Have an old pc case sitting around that i dont use!! Nd i want to get started in case modding but with a twist this one is modded into soethin else not a a pc but sumthing cool and weired!! So far i have coffe machine mini greenhouse and fish tank!! any ideas you guys mught have?

Question by Lesedi 9 years ago  |  last reply 9 years ago


Alternative to L293D?

Hi all. i'm pretty new to the electronics thing, and i'm just getting started with Arduino. i've decided to move on to motorized projects, such as IP cars and such, but i can't seem to find any decent motor controllers. as far as i can see, i need an L293D chip, but can't find one anywhere in south africa. are there any alternatives i could try? my appologies for being a noob. Thanks :-)

Question by dasta 6 years ago  |  last reply 6 years ago


African Makes Paraglider From Plastic Bags

Awesome.Cyril Mazibuko grew up in the shadows of the mountains. Born in a small kraal at the foot of the Drakensberg range in the southern part of the KwaZulu-Natal province in South Africa, Cyril would often look up at the 3,000-meter basalt peaks, a playground for African paragliders. Enthralled, Cyril made a decision: He would build his own glider and join them in the sky.Now 26, Cyril is the only black South African currently registered with the sport's ruling body. And it all started with a glider he made from plastic bags, purloined rope and baling wire, a glider that flew -- sort of -- though it both amazed and horrified the professional paragliders who saw it. Wired story

Topic by fungus amungus 11 years ago  |  last reply 11 years ago


Why is my sodium chlorate glowing? Answered

I was making some sodium chlorate using https://www.instructables.com/id/EGXGY5PF23Z375E/, but instead of using some 9v, i put a bridge rectifier on to my AC power (i live in south Africa so 240v) and the I put what i hope was DC into the salt water, which began to glow and made a noise. Why was it glowing and is there any danger to let it run for 2 hours?

Question by BOOM5601 9 years ago  |  last reply 9 years ago


Keeping my tent standing in windy conditions

Hi there all you outdoorsmen and woman, just join this group and would like to find out if you have any tips on how to keep a tent (in my case a frame tent) from blowing away in windy conditions. I am mad about fishing, usually go fishing on weekends (Free State, South Africa), and had my problems with the wind blowing my tent down, hope you can assist and give me some tips. Regards Werner

Topic by Werncor 9 years ago  |  last reply 5 years ago


fm transmitter

Most mosques in  durban , south africa transmit live trasmissions using fm transmitter. the previous transmitter was independent with its own pick up microphone. only needed to switch on transmitter and you could hear the talks on the fm receiver. most programs dont require use of amplifier . we updated and now the  new transmitter is connected to amplifier which is compulsory to switch on if you need to transmit . it is also a flat sound whereas the old trasmitter picked up a good echo sound. is there any device that the transmitter can be plugged into instead of the amplifier that has a pick up microphone.  thanks mahomed 

Question by modtrend 4 years ago


6 wheeler using a hydraulic power steering pump .Where can i get plans?

I had an 8 wheel Argo and reckon I can make one using a hydraulic pump and two drive motors much the same as bobcat drive.I have a two thousand liter pvc tank to use as a body and can fabricate a ladder chassis for the wheels to attach to.Has anyone done this and documented their methods or are there plans available?I am in South Africa and I was looking for the drive train from a Dixon zero turn grass mower as a doner vehicle.Has anyone tried this?

Question by stephen maher 8 years ago  |  last reply 8 years ago


Anyone know how to build a 2 way radio into your motorbike helmut?

Looking to take apart a set of 2 way radios (walkie Talkies) and put them into my helmet (and my Mates) so that we can comunicate on the road. Looking to have the "talk" button on the handle bar, the main body of the walkie talkie on the "dash" and then a wire running up to the helmet (with a disconnection piece) and then build the ear piece into the inside helmet. Any one got any ideas or has anyone done this before. I know I can buy them but here in South Africa they are very expensive. Thanks

Question by saffa 9 years ago  |  last reply 9 years ago


Indoor heating

Hi, I hope this is the correct place to ask some rocket minded guys how we can solve our fridged home problem. Our 30yr old cottage built with 2 layer perimeter brick and covered with heavy clay tiled roof becomes a freezer in winter. With restricted use of power as a result of our Govt's poor planning it gets cut at anytime and gas heaters not being safe, is there a simple way to get natural heat other than installing a fireplace at great cost that could heat all rooms?  B'lieve me guys it's ccold here even with a winter's sun outside, so solar panels or similar would need to absorb heat to distribute it all round and be very costly -  Sunny South Africa not so warm.  Muscpro

Topic by Muscpro 7 years ago  |  last reply 7 years ago


I need a manual transmission drive unit - that works like an egg beater or butter churn

I design micro - and slightly bigger - biodiesel units.  I want to mix the methoxide with a non-electric mixer.  Slow and steady is all that is needed.   I have the idea of using a mixer that works like an egg beater or butter churn.   The mixing container will be of 100-200 litre capacity with a closed lid to avoid chemical fumes. Can anyone directly me to where I can source something like this?  I have been to a couple of companies in the food processing industry - to no avail (yet) - as most equipment is electric. I work from Centurion, Pretoria, Gauteng, South Africa  -  so local will be lekker (excellent) !!

Question by Bioman.co.za 7 years ago  |  last reply 7 years ago


See how it all began (but please don't visit!)

A news article on Nature today reports a find of living, growing stromatolites in an Andean saline lake (first image). Stromatolites are layered growths of cyanobacteria (photosynthesizing algae), and constitute some of the oldest (3.5 Gya!) macroscopic fossils known (second image).Update: My writeup above might be a bit misleading. This is not the only known stromatolite colony; Shark Bay, Australia, is the most well known, and there are a few in South Africa. This discovery is important both because of the altitude, and because it's an inland site without contamination.Note: If you don't understand some of the words above, open a new browser window, type "wikipedia" in the search bar, then cut and paste the big words into Wikipedia.

Topic by kelseymh 9 years ago  |  last reply 9 years ago


Rechargeable LED Strip Lights off a 12v DC Battery

Hi Guys, Here in South Africa, we have something called "Loadshedding" which at the moment involves daily 2 hour long blackouts (usually at night). So I need to build an LED strip light setup that can run off of a 12v battery for at least 2 hours and that can be recharged when the power comes back on. Ideally I would like the battery housed in a box (out of sight) with a connection on the outside of the box (to be connected to an adapter to recharge when necessary) as well as a switch. Does anyone know the easiest and cheapest way to accomplish this?  Thanks!

Topic by sakershaun 3 years ago  |  last reply 3 years ago


how to use LDR as a relay for RC car to increase voltage to motor

Hi there,  I would like to know more about how LDR's work, its quite difficult to source 3 volt relays in South Africa, so I had an Epiphany, why not use 2x  LDR 1x for Forward and 1x for Reverse on an RC car, I don't know much about how responsive the solution is, how many seconds or milliseconds delay  there is? Does it work like a switch?  would it be a viable option on an RC car? I'm sure this could apply to little 3 volt RC cars upwards, I know brushless is the way to go, however this would indeed be a great learning experience.  kindest Regards, Lee Reddy. 

Topic by Leereddy1818 2 years ago  |  last reply 2 years ago


Funny Joke

Ok here's a pretty good joke I heard earlier ... .... .... Ok so there were three rugby players ... one from australia (yeh) one from south africa (eh) and one from NZ (ooh!) so the go down to uh one of the certain countries where alcahol is band (???) they end up having a party and well start to drink some beer and all that ... then a local police officer comes to see whats going on ... he finds out what they've been up to and starts to whip the three ... but "Hey South Africa, I heard you played well in the world cups, so I am going to grant you a wish before I give you your 30! lashes" (officer) "Ok, I wish for one pillow strapped to my back please." (SA) So the cop lashes him 1,3,5,and ten times.  But the pillow disintegrates and the player carries 20 lashes "Hey, it's australia ... I  saw you played really well durig the games!! I'll grant you one wish before I give you your 30 lashes."  (officer) "Ok I wish for 2 pillows strapped to my back!" (aussie) he gets whipped 20 times and his 2 pillows fade away too so he recieves 10 lashes. "Wow it's NEW ZEALAND !!! I seen you play REAL well in the games I 'm happy to grant you 2 wishes" "Ok for my first wish I want 50 lashes" NZ  "ohh someones trying to be the tough guy hahaha" (cop) "and for my second wish i want that AUSSIE strapped to my back instead!" NZ Ok that was it please comment!

Topic by kenexinator 9 years ago  |  last reply 8 years ago


How do I build my own solar pathway light from scratch?

Hi There, I have just recently joined the site. I would love to make some sun jars as gifts. However most of the solar path lights are quite expensive here in South Africa and I might just as well just buy a sun jar rather than do it DIY ... Is there anyone who could point me to an instructable that shows you how to build the solar unit yourself (in short I want to build it from scratch) ... please bear in mind that I have two left thumbs, so the instructions would have to be quite clear. Thanks in advance to anyone who would be able to assist.

Question by Wilmich 9 years ago  |  last reply 7 years ago


$50: Dewalt Drill and Instructables Prize Pack

Hi Folks I won a 2nd place prize in the Instructables Plywood contest, which is: Second Prize (5) Five Second Prize winners will receive: a DEWALT DWD112 8.0 Amp 3/8-Inch VSR Pistol-Grip Drill with Keyless All-Metal Chuck an Instructables prize pack including a robot t-shirt Estimated Value: $85.00 Unfortunately I cannot use the drill, since it is 110V and South Africa uses 220V. I would like to swap it for a $50 Shapeways/Amazon voucher  (that's easier than sending cash). I have already confirmed that the good folk at Instructables will happily ship the package directly to you once I put your details in the claim form. I'm negotiable though, make an offer ;-)

Topic by ossum 3 years ago  |  last reply 3 years ago


How to Clean Silt from Dug Round Water Wells Used by 3-4 Billion People on Planet?

This is a clam shell bucket, from an old toy crane. I am taking this to a machine shop, welder, had having them make it 18 inches wide. It would be used only with rope, no block and tackle.  Problem: As best I can surmise, about 1-10 percent of hand dug, round water wells used by around 4 billion people on the planet are full of silt, dirty, and old plastic jugs used to pull the water up from well. As the silt rises in the well, the wells slowly become too dirty, or the locals need to pull the water out in buckets, then allow the silt water to settle. It is way to expensive for people who earn 10 USD per day to pay people with pumps to drain the wells. I want to create a 1-2 man powered clamshell bucket system to clean these wells.  What is the best way to make a method to clean a dug well? How much would the steel, rebar cost? Labor is 10 dollars per day in central American, South America, Africa etc. Thanks for help, I will take the finished bucket to Lome, Togo West Africa to test, and modify, iterate. Andy Lee Graham of HoboTraveler.com https://www.hobotraveler.com/blogger.html

Topic by hobotraveler 1 year ago  |  last reply 1 year ago


A sight for international skywatchers - "Ring of Fire" Eclipse

From SpaceWeather.com:SOLAR ECLIPSE: On Monday, Jan. 26th, the Moon will pass in front of the sun producing an annular "ring of fire" eclipse. This is not a total eclipse; the Moon will cover only 93% of the sun's surface. Nevertheless, the Moon's dead-center transit across the solar disk will produce a sight of rare beauty for observers along the "path of annularity." Best views are to be had from islands in Indonesia where the ring of fire will appear to sink into the ocean at sunset. Meanwhile, in Australia, southeast Asia, southern parts of India and South Africa, observers will experience an off-center partial eclipse. Crescent-shaped sunbeams will dapple the ground while high overhead the Moon takes a curved bite out of the sun. Please visit http://spaceweather.com for eclipse maps, timetables and photos.If you're in the areas where the eclipse can be seen, how about taking and posting pictures?Animated map of eclipsePDF map of eclipse

Topic by Kiteman 10 years ago  |  last reply 10 years ago


Build a small solar powered, battery operated LED bedside light?

Firstly, I am a mom of boys, who want to build their own stuff. I am a nurse/midwife, so very knowledgable about many things. Electronics is not one of them! But I'm willing to learn and find help for them. the store I will be using is www.rabtron.co.za as we are in South Africa.  This is the light my son wants to use for this project. http://shop.rabtron.co.za/catalog/module-samsung-5630-chip-leds-plastic-white-p-6957.html He will need about 4m of wiring to run it to the solar panel just outside his room.  What would be the best components for him to use, - rechargeable battery, solar panel, switch, and any extras that I don't know that I need.  Also, if he does not use solar power, what battery configuration would work best? Thank you for taking the time to help us. We hope to be tackling many projects in the future. 

Question by BW7 3 years ago  |  last reply 3 years ago


How to make a DIY relatively long distance radio signal emitter/tracker? Answered

Hi, This is a bit of a two-parter. The first part is that I would like to make a DIY radio emitter that could transmit to a distance of 1km. I'm not sure about the laws in South Africa, but it should be legal if within the ranges prescribed by the law. The second part is that I would like to create several devices that could track the nearest radio signal on a specific band or band range (as I would expect that I would have to use a filter for both the transmission and receiving). I think that direction of the source of the signal would be sufficient.  The reason for this is that I have had a few instances over the years where people got lost while camping and had to sleep in the wilds because it was too dark to find their way back to camp. Any advice, thoughts, links would be much appreciated. Also, if you have any other ideas that will cost about the same or less, that would be awesome to try out, too :) Best regards, Vuur

Question by Vuur 3 years ago  |  last reply 3 years ago


Ideas anyone? Making electric coals

 Hi guys, girls 'n robots! I intend to build an electric coal (for my hookah) and I need advice from all you electronic dudes and dudettes! If I use nichrome what length and gauge should I use to achieve the following Specs: 1.  12 V power supply  OR 220 VAC (South Africa) 2. Minimum 400 Celsius / 700 Fahrenheit 3. Preferably 600 C / 1112 F The element will be wrapped around a "doughnut" which I will fabricate from heat resistant cement, it will be +/- 2 inches diameter with an inner diameter of about 3/4 inch and 1/2 inch thick, therefore keep in mind that the nichrome must be able to heat all that ceramic. If, during my testing, the nichrome expands sufficiently to short out then I'll cut grooves in the "doughnut" to keep them in their places. In the image orange represents nichrome wire ONTOP of the "doughnut" while yellow is BELOW I am in no way adept at electrickery. As a side note of lesser importance, any ideas on building a circuit to add a dimmer or potentiometer to the mix to regulate the temperature? Thanks in advance!

Topic by Baronrc 9 years ago  |  last reply 4 years ago


Why Vegan Is Good?

Here are four reasons that make me cook and eat vegan, and most important – enjoy it: Vegan is Healthy - Eating vegan and fresh food several times per week will make you lose weight, look better, be full of energy and feel better. Go back to the roots. Vegan is more Sustainable - Conventional livestock farming is the most polluting, water using, greenhouse gases emitting and cruel industry humans have ever managed to create. And don’t give me that crap about pesticides and migrant workers picking the vegetables – buy seasonal (see recipes for autumn-winter, spring-summer or all season meals) and local products. It’s your choice who you’re giving your money to after all! Vegan brings Cultures together - Vegan meals are dominant menu in all ancient cultures – from India and the Middle East, through South East Asia, the Americas, Europe and Africa. Vegan is a Challenge - My first rule – never follow a recipe to the letter. Use your imagination and creativity, change it according to your personal taste, improvise and share your experience. And here I am putting together a cookbook with easy vegan recipes and willing to share experience! 

Topic by DiaPia 7 years ago  |  last reply 2 years ago


So I'm trying to find the focal point of a satellite dish.

The dish is oval, and I am not sure if it is parabolic/spherical. Here is a picture, with measurements: http://s753.photobucket.com/albums/xx180/EternityTransfer/ I'm not too sure how this dish focuses, as it seems that vertical waves will be focussed differently to horizontal ones, due to the oval shape and that the depths are different depending on which axis is measured. I ideally want to make a parabolic microphone from this dish. There seems to be a focal point about 60cm from directly above the center of the dish, but when viewed from very off-centre angles, the dish seem to have other points too. How would I determine the "optimal" one? It is coated in a thin layer of aluminium foil, which I put on to reflect light when finding the focal point. Unfortunately there are no serial/part numbers, and the dish is missing its feed horn and support so I can't approximate the focal point form there or from datasheet(s). Any help would be greatly appreciated. EDIT: Oh and the dish originates in South Africa, and is stamped with a number which looks like a date of manufacture: 19950610. Googling the number yielded no results so its probably a date.

Question by LinkVanyali 8 years ago  |  last reply 8 years ago


Transformer Technicalities?

Hey guys I need some help from the experts. I am building the microwave transformer ark welder instructable. I have acquired my microwave transformer, and rewound the secondarys. Now here's where it get interesting. I stay in South Africa, and we have 220v, 15amps coming out of the wall. So I figured with so much wall power I probably only need one transformer, cos I already have too many amps (on paper). So from what I understand, I will be putting 3300watts(220v*15Amps) into this transformer. Another interesting detail is that I think my transformer has 200 turns! I put 16 turns on the secondary (although there is space for more, I just don't have a piece of wire long enough). Which means that my out put voltage will be 17.6v, and 187Amps! Ahhhhhh!!!! If I wind a few more turns on the secondary, I could probably squeeze 25 on there, that will bring my output voltage to 27.5v and 120 amps. Which seems like quite a lot? So here's my question: Will this work? If not, and things go bad, what will happen? Is there any chance that the primary coils will melt, or is it only the secondarys that will do that? I don't really want to destroy my transformer, because they are really hard to get here. South Africans won't give you snow in winter. I had to buy a broken microwave! One idea I had: I have a single coil wrapped around a plate iron core, it looks just like a transformer but with only one set of windings. The thing is as big as the microwave transformer, its wire is of a slightly thicker gauge, and it probably has about 600 turns on it (it belonged to a florescent light setup). I thought I could connect this up to the secondary winding, maybe it will bring the amps down, and also serve as an inductor/ark stabilizer. But I'm just guessing, I'm a complete noob to electronics!?

Question by lenny25 9 years ago  |  last reply 7 years ago


Help needed with flashing brake light microcontroller

Hi All New here and hope you can help me out. I am a biker in south africa and would like to put together an aditional brake light that flashed 4 times then go solid. Microcontroller will most likely be the easiest and have design one as follows. (the coding has been done) LED's to be used is 20mA at 2.2V My concern is that for the amount of LED"S (100) i want to use 1amp is not enough and therefore i am using a LM7810 to drop the voltage from 12V to 5V with a cap to increase the 1A output to 5A I wish to wire the LED's in parralel si if one pop's then it wont affect the rest of the LED's. Must i therefore still wire a resistor in front of every LED? (180ohm?) or can i wire in this LED before the LED matrix to give it a 2.2-2.3V throughout the LED matrix? Here is my design : http://i247.photobucket.com/albums/gg156/HannesNel/design_zps52f754cf.png 2nd EDIT : How about this? reworked the design a bit? Then i drop the 12v down to 2.5V needed for the LED's and no resistors needed? I also opped for the LM350 due to the higher amps it can handle http://i247.photobucket.com/albums/gg156/HannesNel/Untitled_zpsc9900901.png 3rd update: Now using super bright LED's with a rating of 2V and therfore will use row of 6 in series to give 12V...still need resistors when connecting the 6 banks of 6 LED each in parralel? http://i247.photobucket.com/albums/gg156/HannesNel/Untitled_zps684a2209.png

Question by HannesN 4 years ago  |  last reply 4 years ago