Nokia: Bicycle Charger Kit for Mobiles

There was a major announcement today from Nokia about the release of cheap phones for the emerging markets, featuring dual sims and the ever useful LED flashlight. What is even more interesting is that with the launch of the phones, a bicycle charger kit. According to CNET Asia, the kit will be available by year’s end.

Bicycle charger kit for mobiles

Rounding up the announcements today is the Bicycle Charger Kit, which comprises a charger, dynamo and phone holder. When docked to the latter with a 2mm charger jack, the electrical generator will produce energy to juice up the handset. According to Nokia, the dynamo starts charging when the speed of the bicycle reaches 6kmh and stops when it hits 50kmh. It matches the efficiency of a normal charger when the bike is traveling at 12kmh.

The bicycle charger kit will be useful to many people in Kenya and other emerging markets, its only a matter of time before it is repurposed to charge other devices like small radios. All in all the phones seem AfriGadgetty, what with their dual sims; perfect for markets where people have more than one carrier – thinking of Nigeria here, where its not uncommon to see someone with multiple phones because of varying network coverage/dependability + LED flashlights, it is clear that Nokia is making products that have utility for millions of people around Africa. Personally I can’t wait to try out the phones and mobile kits as soon as I can get my hands on them. Come to think of it, this is hardware localization, something that could go hand in hand with the software localization we are clamoring for in the African market.

Bicycle charger kit for mobiles

For modded bicycle posts from the AfriGadget archive, click here.

Many thanks to my friend Cyrus for the heads up, I think he has just inspired me to blog again.

Building a (one-stage) Anaerobic Digester

David of the Kenyan Community Initiative Support (KCIS) recently built a very low tech Anaerobic digester using only a drum, a valve and some pipes:

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The balloon shows that gas is being produced. The costs for the drum and professional valves may already be too high for some, and the design isn’t that optimal. They intend to add a storage drum with a water-filled header tank for constant pressure and the loading & desludging processes obviously still require some work.

We still like the approach though, because it does indeed “prove the theory”, as David notes. The theory of building a rather small anaerobic digester that will even work with smaller amounts of organic waste.

Goes to show that producing methane gas from something which would otherwise remain unused (livestock faeces usually kept in such drums for a few weeks without harvesting the methane potential) still is an interesting alternative & well appreciated once costs are covered.

Jua kali dressed in Mitumba

Cat walk ready arc welder
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
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)

Fuel saving Sufuria

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. sufuria 1

This is what it looks like when assembled

Sufuria Kenya afrigadget
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.

Flat parabolic mirror is not an oxymoron!

Can a parabolic mirror be flat? Dominic Wanjihias latest invention may prove that this is the most efficient way of capturing solar energy.
flat parabolic mirror 2

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.

flat parabolic mirror

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.

Fab lab sign .