invention – Page 2

Cleaning massive amounts of water with chlorine

Cleaning massive amounts of water with chlorine from WhiteAfrican on Vimeo.

Suprio Das is part of the water-cleansing team with Killian Deku, Laura Stupin and Bernard Kiwia. Besides the ball-valve doser, they’ve also created a siphon mechanism chlorine filter. It, like all of the IDDS work, uses locally available materials.

This particular project attaches to a hand pump and can cleanse unlimited amounts of water. Best of all, it has no moving parts, so it is less likely to break or wear down over time. It works by dripping chlorine into the water when a certain water level is reached. Then, the water comes pouring out in batches.

Ball Valve Chlorine Doser

With one 5 liter bag of chlorine, and a device that costs $3 to build, you can clean 100,000 liters of water.

Here at Maker Faire Africa is Killian Deku, a Ghanaian working in the IDDS program, has created a ball valve chlorine doser with the help of his team mates from India, the US and Tanzania. Their only real costs were the ball valve and the time taken to create the bamboo structure that holds it. The one variable cost is the bag of chlorine used to cleanse the water.

Ball Valve Chlorine Water Cleanser from WhiteAfrican on Vimeo.

A plastic waste recycling press

We’ve got a lot of plastic trash all over Africa, especially in the cities. A team from IDDS (Amit Gandhi from the US, and Mark Driordan from the UK) decided to create a way to add value to waste plastic by using a low-cost process to transform it into something useful: plastic sheets. From these sheets can be made a number of other products. On display they had shoes, bags, pencil cases and folders.

The sheets can be made from 3ply to 40ply in thickness, and the cost of assembly is minimal.

Turning waste plastic into plastic sheets from WhiteAfrican on Vimeo.

A pedal powered hacksaw for the disabled

Bernard Kiwia is from Arusha, Tanzania. He’s here at Maker Faire Africa as part of the IDDS group that has been building innovative devices for the last couple weeks in Kumasi, Ghana. Today he’s showing his device that he created from an old bicycle and some welded rods. It’s powered by someone sitting in a chair.

Pedal-Powered Hacksaw in Ghana from WhiteAfrican on Vimeo.

It cost Bernard about $45 to create the bicycle powered hacksaw and one day to fabricate.

Bernard’s been a bicycle mechanic for 3 years, and has been teaching students in Tanzania to fix them for the last couple. He was invited to IDDS and met a Guatemalan attendee that had some very interesting designs using bicycles. After seeing those, he realized that he could make similar tools and devices for the needs of people in Arusha.

(more pictures from Maker Faire Africa on Flickr)

Since that time, Bernard has created a windmill, cell phone charger, drill press and a pump – all working off of bicycle parts and mechanisms.

His bicycle powered water pump. It sits by the side of the road for kids to jump on and pedal:

A chair made from bicycle parts:

Simon Mwaura’s Mobile Remote Control Inventions

Simon has hardwired a way to open and lock his door remotely via his phone, as well as get tea brewing and other manual and remote tasks. The video speaks for itself, so I’m not going to say anything other than to link you to my past thoughts on challenges for tech entrepreneurs in Africa.