Recherche par propriété

Cette page fournit une simple interface de navigation pour trouver des entités décrites par une propriété et une valeur nommée. D’autres interfaces de recherche disponibles comprennent la page recherche de propriété, et le constructeur de requêtes ask.

Liste de résultats

3D filament extruder + (The aim of this system is to recycle plastic bottles into filament for a 3D printer. (not yet finished))

Ceramic water filter + (A ceramic water filter is a system for purifying unsanitary water. This tutorial aims to show how a ceramic water filter works and how to build one on a semi-industrial scale.)
Balcony planter + (A mini kitchen garden that can be hung on a balcony. It's made from plastic bottles and old clothes.)
Thermal curtain - prototype 2 + (A prototype for making a thermal curtain using milk cartons, which is mainly made up of: -75% cardboard -21% polyethylene (plastic). -4% aluminium.)
Desert fridge - light version + (A traditional zeerpot (or desert fridge) m … A traditional zeerpot (or desert fridge) made with terra cotta pots quickly becomes heavy and difficult to carry around. The version presented here is a lighter and less expensive variant, feasible with materials that can be more easily found. The envelope is made out of fabric. The container can be in plastic, metal or any other sand-proof material. This container can be closed with a plug/cover or a fabric.n be closed with a plug/cover or a fabric.)
Sunlight-luminosity measurement with a single board computer (raspberry-orangepi) + (As you might not know, the meteorological … As you might not know, the meteorological surface synoptic observations data (SYNOP, available here: https://donneespubliques.meteofrance.fr/?fond=produit&id_produit=90&id_rubrique=32) does not take into account sunlight/luminosity.

Sunlight/luminosity data can be interesting to gather for a diversity of uses (home well-being, photovoltaics production, plants care,...).

For photovoltaics, although the technology is old, I did not manage to find reliable measurements for cloudy weather.

We find videos of such a measurement, for example this one:
https://www.youtube.com/watch?v=H_Aow78MFmQ&ab_channel=TopeSosanya
that may suggest that solar pannels produce at 50% of their nominal capacity.

My measurement instruments being subject to interferences, I dont really trust my measurements to be reliable, so i thought about producing simple code that other users less subject to interferences could reuse at their convenience.

This tutorial will allow you, with only two commands (after installing operating system and docker), to use your single board computer like a weather station recording sunlight/luminosity every minute in a database and producing a web page where results can be retrieved with date filters options.
the demo is available here:
https://vpn.matangi.dev/lum

Note: dont trust the measurements displayed in the demo above: the ecoterrorist french police doctrine destroys the possibility to do science correctly in france with computers. I do not have the adequate financial and technical means, and I do not want to spend time playing cat and mouse again and again to dodge recurring cyber attacks and shackles. The logic integrity of the code is good. If the system changes, or if you are not targetted too much, this could be useful.

Publishing on lowtechlab is a signal to encourage you to do your own measurements with diy stuff, like a multimeter and an old offline camera to upload on youtube or peertube. If you read this tutorial and you are not yet an ecoterrorist, you have a superpower: the invisibility cape. old offline camera to upload on youtube or peertube. If you read this tutorial and you are not yet an ecoterrorist, you have a superpower: the invisibility cape.)
Extrusora de filamento 3D + (Ce système a pour objectif de recycler des bouteilles en plastique en filament pour une imprimante 3D. (pas encore terminé))
Extrudeuse de filament 3D + (Ce système a pour objectif de recycler des bouteilles en plastique en filament pour une imprimante 3D. (pas encore terminé))
Extrudeuse de filament 3D + (Ce système a pour objectif de recycler des bouteilles en plastique en filament pour une imprimante 3D. (pas encore terminé))
Wind turbine + (Create an wind turbine from stepper motors from an old printer.)
The wind turbine + (Creating a wind turbine from printer stepper motors)
Micro-gasifier Cooking Stove + (How to make an inexpensive portable wood cooking system.)
Plastic bottle cutter + (Make plastic yarn with a bottle cutter)
Plastic pyrolyzer + (Produce fuel from plastic)
Water tank + (Rainwater harvesting system. The system is simple and sober. Connected to a gutter, the tank installed on a wooden structure contains the recovered water.)
Batteries recovery + (Recycle computer battery cells to create a photovoltaic lamp.)
Small Recycled Bottle Boxes + (Recycling plastic bottles to make small bo … Recycling plastic bottles to make small boxes is a great way to reuse materials and create useful objects. This tutorial provides a step-by-step breakdown of how to cut and assemble the bottles to create practical storage boxes. The tutorial covers the materials needed, the cutting technique and tips on how to ensure the boxes are both functional and aesthetically pleasing.oth functional and aesthetically pleasing.)
Wtl + (Remplacer la couvercle du chasse d'eau par une couvercle en plastic recycle modifier, pour verser notre eau récupérée de la douche, puis la transportée par les petits arrosoirs colorés WC)
Oyas + (Semi-buried micro-irrigation system.)
3D filament extruder +
Boiler stove + (The boiler stove is a system designed for homes to heat a water tank with wood.)
Ram pump + (The purpose of this tutorial is to facilitate the understanding, design, manufacture and installation of a water elevation system called "Ram pump".)
Hydroponics + (This tutorial aims to introduce hydroponic … This tutorial aims to introduce hydroponics and how to build an individual system. This technology was documented during a stopover in Singapore of the "Nomade des Mers" expedition. We met Comcrop, a company that grows aromatic plants (basil, mint...) on an area that is usually unused and worthless: the roofs of buildings!sed and worthless: the roofs of buildings!)
Solar lamp with reused lithium cells + (This tutorial allows you to make a solar lamp equipped with a USB charger. It uses lithium cells that are reused from a old or damaged laptop. This system, with a day of sunlight, can fully charge a smartphone and have 4 hours of light.)
Flower pot + (This tutorial shows you how to make a flower pot from a plastic bottle. The idea came from a broken flower pot, whose plant needs a suitable environment in which to grow.)
Orangepi-raspberry pi nextcloud server (photovoltaics powered) + (Tutorial to setup a nextcloud server (equi … Tutorial to setup a nextcloud server (equivalent to google drive but free and adapted to collective organisations) on a single board computer (photovoltaics powered)

This tutorial is not really "lowtech" at first look because we talk about computers and photovoltaics

However it is as didactic as possible and follows a lowtech philosophy to share knowledge, avoid unreachable tech by information rentention, complexification by design, or proprietary dependance by design.

We also give sizign tools for photovoltaics with a few explanation. It's up to to you to size your computer working hours on a sun schedule, ie respecting human temporalities.

Nextcloud (framasoft offers a service here: https://www.frama.space/abc/fr ) is a cool service to organise collectively and allows to share files, have a directory, a chat, work cooperatively on libreoffice files, and even do visios. We can also imagine mobile infokisosks on this principle.

The tutorial puts into question the vpn market, the phtovoltaics with brand new and expensive batteries (in reality photovoltaics has become too competitive compared to petrleum and even more compared to nuclear power!), and the gafam market and their surveillance design is damaging trust and social links. The commands are those for a debian system

Finally, the tutorial is made iwth 4G modem (and a wired connection to orange pi which has no wifi card by default), and is updated on this 10th of april for a raspberry pi connected to a "shared wifi" of your telephone (see stage 6 for a wifi in wpa3 and stage 16 for a wifi in wpa2)pi connected to a "shared wifi" of your telephone (see stage 6 for a wifi in wpa3 and stage 16 for a wifi in wpa2))
Light bottle cutter + (With this bottle cutter it possible to make a plastic rope from plastic bottles. It is simple to make and can be carried everywhere.)
Thermosyphon Solar Water Heater + (A very simple system for heating water using solar energy. This system works, without a pump, using only the thermosiphon effect.)
Micro gasifier stove + (Build an economical and transportable wood cooking system.)
Solar Generator Trailer- Electrical System + (This tutorial presents the sizing and cons … This tutorial presents the sizing and construction of an electrical system for a solar generator (1 kWp or ‘kilowatt peak’) which can be moved by bicycle. This structure was designed to fit on the CHARRETTE, an assisted trailer designed by the Véloma association, whose plans are freely available.ciation, whose plans are freely available.)
Crème à récurer à base de cendre + (Très simple : un combo crème-à-récurer/produit-vaisselle pas caustique, tensioactif, qui recycle les déchets du feu (la cendre, quoi), très facile à réaliser... et qui marche super bien.)
Closed-loop hydroelectric generator + (The aim of this prototype is to generate electricity from water. The system operates in a closed loop, meaning that no water is lost and that it can be reused.)