AfriGadget

Catwalk ready arc welder

This bizarre fabricated arc welding machine is the unique collaboration between jua kali and mitumba. Jua kali literally means hot sun in Kiswahili, and refers to the informal small traders who work outdoors in the sun fabricating mostly work metal and wood items, fixing cars and other household items. Unable to afford new tools they fabricate their own out of locally available materials. Mitumba refers to the second hand western clothing sold on the streets of many African cities. The arc welder uses stolen scrap and second hand wires that are coated for insulation using strips of cloth torn from unsellable mitumba clothes.  This is then wound into the welding machine coils.

God help James if it rains!

I’d gone to Limuru to get a welder for a job on a dairy where I met James Mutahi. He is a typical jua kali wrought iron artisan who operates on the sidewalk outside his street workshop using his own home made tools.  I’ve seen jua kali home made arc welding machines before but usually they are housed in a protective box. To save money James dispensed with the casing revealing the guts of his arc welder.

James was making security grill for a window. There’s a huge demand for arc welding in Limuru especially for gates and window bars which are essential in the high risk security zones of Nairobi and other urban centers.  Nairobi’s security is the result of the collaboration between mitumba and jua kali!

The picture speaks volumes about the Jua-Kali sector in Kenya– cost saving is paramount whilst safety is overlooked hence no housing box – look for welding goggles, fire extinguisher and other safety gear.

(This submission is from Dominic Wanjihia)

I have just spent a week in the field studying Masailand ecology and community conservation with Princeton University students. The location is not that remote (Kitengela and Olerai within 40 km of Nairobi) and the community are wonderfully resourceful when it comes to day to day tools for pastoralism.

Tractor tyre trough for water for goats and sheep

This old tractor or truck tyre was somehow cut, opened up and sealed at either end to make a perfectly good livestock watering trough. Even Joy Adamson noted that the Masai question using modern appliances if home made ones do the job anyway.

Tractor tyre cattle salt lick

Another way to make  a salt lick, Evelyn just cut a truck tyre in half and placed it  on the ground supported by stumps.

home made bucket works perfectly

Why buy a bucket when you can just make one with an old water container and a piece of metal?

Home made shovel

And if you don’t have a shovel for your manure, just straighten out some corrugated iron, cut it and nail to a stick  and Presto – probably more effective than anything you could  buy in Nairobi. Manure is one of the few products sold to passing trucks on these remote ranches.

Keeping land open for wildlife migrations in and out of Nairobi National Park can be costly to those living with wildlife. Those in The Wildilfe Foundations land lease scheme earn 4$ per  acre per year to keep the properties open (no fences)  and to supplement their income they make beautiful beaded artworks for sale on Olerai Conservancy.

It might look like a tough life for some of us, but the Masai out here seem perfectly satisfied and at peace

Here’s another interesting idea from Dominic Wanjihia (see links to his other gadgets below) – the fuel efficient Sufuria. A sufuria is the aluminium pan that is used by virtually everyone in Kenya to make tea, ugali and for cooking vegetables. Like all pots that we use, energy is wasted around the sides of the pot. In Africa this is expensive as fuel be it gas, kerosene or charcoal  is expensive.

This is what it looks like when assembled

Sufuria Kenya afrigadget

This is what it is comprised of – two sufurias to make one efficient one. Basically a hole is cut out of the bigger sufuria – and the piece cut out becomes the lid so nothing is wasted. To wash the sufuria you just dismantle the pieces by just slipping it out. The heat that otherwise escapes around the edge of the pan, is trapped between the cooking pot and  it’s sleeve.

Though it’s not in production, Dominic is using this sufuria at home and swears that it saves at least 50-75% energy on a kerosene stove (his estimate is based on how long it’ takes to boil water).

So if you put a fuel efficient sufuria on a Kinyanjui fuel efficient stove I wonder how much energy saving you could achieve?

Dominic Wanjihia has been previously on Afrigadget showcasing his flat parabolic mirror, container garden, wearable Solar Panel vest, Food dryer, and camel milk cooler.

Can a parabolic mirror be flat? Dominic Wanjihias latest invention may prove that this is the most efficient way of capturing solar energy.

Everyone knows what a parabolic reflector is, right? It’s supposed to be a curved surface that collects energy by converging it towards a focus. Parabolic reflectors were invented a very long time ago and have been used in satellite dishes, spot lights and car headlights to name a few. They are also widely used for alternative energy projects to concentrate solar energy for heating and cooking.

Dominic (designer of the flexible solar vest, the solar dryer, and camel milk cooler for Somalia) thinks that the parabolic mirror should lose it’s shape which is an obstacle, to transportation and function.

So how does the flat parabolic mirror work? Dominic has cut inch wide 2 foot long pieces of flexible acrylic mirrors and arranged them at specifically computed angles. When angled towards the sun, this creates a perfectly focused beam of light.

This concentrated energy can be used to heat water in a pipe for numerous purposes including generating electricity. The beauty of this gadget is that

1. It is very cheap,
2. It can be quickly dismantled or moved,
3. It is easily transportable as it can be carried flat or in a tube,
4. It is easily repaired if broken as the individual mirror pieces can be replaced (rather than having to fix or replace an entire parabolic mirror).

Please note that this is part of Dominic Wanjihia’s ongoing project with Nairobi University and MIT’s FabLab where he is doing a course.

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In Africa bicycle repair men can be found everywhere, from under a tree to in the local vegetable market, one of the best places to find African innovations.

At the Karen market I met the charismatic Mohammed Makokha who proudly showed me two of his home made gadgets that are critical for his business.

I’ve obviously been wasting my money in the bicycle stores.

It’s no secret that Kenya’s rivers are running dry as a result of forest destruction and environmental degradation which has led to a season of blackouts in the capital city Nairobi.

Typical of the ingenious people of Nairobi one street vendor has cashed in on the crisis with this wonderful gadget which he markets as

“Perfect for Nairobi black out”

As you can see I could actually read by the light of this lamp which is made from a used tin can, some pieces of wire to make the connections

And the battery compartment is ingeniously crafted from a circle cut from a retired flip flop.

I love my juakali lamp and everyone that I know  in Nairobi needs one of these lamps. Everything about it is so true to the juakali spirit – hand crafted using colourful recycled tins, and designed for a real purpose with a handle so you can move it around from room to room or hang it up. The vendor tried to sell it to me for Ksh 350 but we settled on Ksh 200 (about $2.50) though I’m sure he would have gone cheaper but the traffic was moving and I had to go.

If you want one visit the Nyayo stadium roundabout.  They stood out amongst the chinese junk that vendors are selling you could practically kit out your house from the junk on sale there. Here’s a short list of what I saw during my 30 minute traffic hold up:

Pens, hats, footballs, blow up spiderman (who needs one of these?), peanuts wrapped in newspaper cones,

smelly car things, driveres licence holding cases, scarves, giant maps, Kenya flags, apples, kits (spiderman kites),

Nike shorts, cowboy hats, socks, oanges, backpacks, cheap watches, key chains knives, olympic medals (yes I wanted one of those!),

knee length shorts for guys who sag, hazard ttriangles, cables to cack your car, name tags for meetings, torches, window wipers (!),

car mats, pears, plumbs, tiny folding chairs for children (or Chinese people?), vehicle number plates, fire extinguishers, stickers,

Enormous framed pictures of furry cats and snow leopards (I can just see one of these this in my house), bananas and bandanas, plastic lunch boxes, pillows and cussions, a huge variety of stuffed toys,

posters with Jesus’ sayings, polo shirts, stearing wheel covers, spanners, screw drivers and of course my favourite – juakali lamps.

Nairobi never fails to impress. I love it. What else have you seen on sale in the Nairobi streets?

First Peaks

The Ministry of Higher Education and Technology has organized a Robot Contest (RoboCon), between Kenyan Universities and middle level colleges. The regional competition is taking place today at the Kenya Polytechnic. Here are the first looks at the Robots from institutions taking part in the competition.

University of Nairobi Robot

Kiambu Institute of Science and Technology Robot

Nairobi Technical Trainin Institute Robot

Kenya Technical Training Institute Robot, The Winner

Machakos Institute of Technology (MIT) Robot

Some video will come soon…

For more information on RoboCon click here.

While hiking in the rift valley recently I came across a cow wearing this plastic gadget on his nose. It’s made from an old plastic container …..the local herdsmen said it was to stop him from suckling his mother – which is especially critical due to the severe drought in the region.

Simple and effective I’d say!

And here’s another one from Dominic Wanjihia – he calls it his vertical shamba

and it’s water efficient and space conserving… perfect for a tiny yard.

Here’s another clever use of plastic water bottles – bird feeders are impossible to find in Kenya

So Maina Maina fabricated this at Kitengela Glass where virtually nothing is thrown away

These feeders have pieces of mirrors attached and attract a huge assortment of birds at all times.  He’s selling them at Ksh 200 (US $2.50 )

This is a proposed way to maximize the usage and efficiency of the KVA Flexible Solar Portable Kit by Dominic Wanjihia. Dominic was awarded one of the Flex Kits at the recent Maker Africa Faire in Accra after showing off some amazing new ideas.

One of the cheapest form of transport in Kenya is the “Boda Boda” literally meaning “Border-to-border”, a bicycle ride from one countries boarder immigration offices through no-mans land to the immigration offices of the bordering country customs office.

This mode of transport is non discriminatory and is used by people of all walks of life. from school children, market goers, workers, business persons, etc. The popularity is partially due to the speed and convenience as one does not get stuck in traffic. In the Lake basin town of Kisumu there are estimated to be over 500,000 BodaBoda’s. In the whole county, in excess of 1,500,000

The BodaBoda rider normally works from as early as 4.30a.m. to as late as 10.00p.m. depending on security in the area. He relies greatly on his mobile phone for clients to call for his services. His peak cycling times are early morning, lunch hour and dusk as persons head home from school and work. Translates to 4 – 5 hours in total daily riding time.

Due to the lack of know how and the complexity of electronics, the lack of power storage (i.e. a battery, and the cost) the Cycle dynamo is only effective for charging items and lighting while he is riding. Also, due to space or lack of, cost, insecurity and theft, attaching “Hard” Solar panels to the bikes has never been a viable sustainable option.

However, with the introduction of the Flexible Panels I believe wearing the panels on his back eliminates all these constraints. It also means he is generating power from sun-up to sun-down, an average of 12 hours a day.

Attaching the flexible panels on his back ensures:

1. His phone is always charged guaranteeing customer accessibility
2. He has light at home from the LED’s so saves on heavy power bills
3. He always has an emergency light with his – LED
4. The panels will not get stolen
5. One can also offer charging facilities to client being carried

Other users
The BodaBoda is not the only potential user of the Flexible Panel by wearing it. Anyone spending long hour’s outdoors is a candidate. The farmer, fisherman, hawker’s and peddlers, city council outdoor workers, tourists, campers and hikers – just to mention a few.

Attaching the Panel
It can be attached in a variety of ways. Velcro, Pop Buttons or simply attach Rucksack like straps so it can be worn with any garment. In the latter case the small pouch containing the controller and battery is attached to the back of the panels with Velcro.

If you would like to get in touch with Dominic, you can reach him at dwanjihia@yahoo.com or by phone at +254722700530

IDDS Ghana 2009

The International Development Design Summit is put on by Amy Smith and her students at MIT. This year it took place in Kumasi, Ghana – which will be followed by Maker Faire Africa this weekend in Accra, where some of their work will be shown.

Here’s a quick list of the projects they have been working on over the last five weeks:

- A press that speeds up the process of extracting oil from shea nuts
- A device for generating electricity from a playground carousel
- A machine for making recycled plastic products from used water sachets
- A set of tools for threshing groundnuts
- A mechanism for producing chlorine from salt water using readily available materials
- A simple, low cost battery made from local materials, for household lighting and other uses
- A human powered grating machine for speeding up cassava processing
- A thresher to improve the quality of rice by preventing stones from mixing with the grains
- A chlorine dispenser for disinfecting drinking water
- A family friendly latrine designed to promote use and hygiene among young children
- A device for monitoring the growth of children under five through cell phone technology
- A container that extends the shelf life of tomatoes during transport and storage

Edward tells Hazwan some of his thoughts on the rice threshing machine.

The importance of being in Ghana

Niall Walsh has written this information about how the importance of the move to Ghana for this year’s IDDS was to both MIT and the participants:

The main difference between IDDS Ghana and IDDS in MIT is the proximity to community partners and potential end users of the projects. IDDS prides itself on the spirit of co-creation and this movement from the States to Africa is a crucial one in line with this vision. The difference between participants sitting in lecture halls in MIT, learning about international development and the importance of speaking to at least fifty villagers before designing a technology, and actually living with and talking to hundreds of villagers all over the country, is immeasurable. In total IDDS this year worked with ten villages throughout the Bromg – Ahafo and Ashanti regions and teams had the chance to make three separate two night visits (spread throughout the design process to make sure they had input into every stage) to these villages. Among a huge number of other factors, the simple experience of having end users actually become extremely excited about your prototype, and seeing them test it out, is an incentive for teams to continue their project after IDDS.

Another way in which IDDS interacted with the local community, rather than simply for it, was through it’s interactions with Suame Magazine. This is an engineering cluster located in the centre of Kumasi, spanning twenty miles and with a working population of over 200,000 people. There are approximately 12,000 independent micro, small and medium enterprises located in the area and their main activities of vehicle repair and metal fabrication (welding and casting) are renowned for their ingenuity all across West Africa. During the summit, participants worked extensively with these engineers and mechanics in the ‘Magazine’ and had the chance to share ideas, techniques, and technologies with each other

The point has been stressed home at this year’s IDDS that these villagers involved in the process, as well as the workshop guys in Suame, are partners in the design process, rather than simply people we should talk to along the way. Without these partners, the technologies presented tomorrow at the Great Hall would quite simply not be possible, and I think that knowledge, in and of itself, will prove invaluable to our participants as they continue to work in international development after the conference. In light of this, five villagers from each village, as well as workshop managers from Suame, will be provided transport, accommodation and food to come to the final presentations to see all the different prototypes.

Systems have also been put in place to ensure that the projects worked on at this year’s IDDS will continue to be worked on after IDDS. There are project grants and partnership grants available for the teams and there will also be a full time country liaison for Ghana, responsible for integrating the technologies into all of our partner villages, as well as sourcing new villagers and markets to help disseminate and create business models for the technologies. On a far more practical level, villagers will also have the opportunity to decide which of the prototypes they are most interested in, and then work with our partners in Suame Magazine to have these manufactured.