OPEN HARDWARE OBSERVATORY

Search Engine and Assessment Platform for sustainable Open Hardware

Category search

Professional search

Semantic search

From OHO - search engine for sustainable open hardware projects

Jump to:navigation, search

This page or action requires Javascript to work, please enable Javascript in your browser or use a browser where this is supported so that functionality can be served and is provided as requested. For further assistance, please have a look at the noscript help page.

Options | Search Clear all entries |

Condition

Printout selection

Options

Parameters [+]

limit:

The maximum number of results to return

offset:

The offset of the first result

link:

Show values as links

headers:

Display the headers/property names

mainlabel:

The label to give to the main page name

intro:

The text to display before the query results, if there are any

outro:

The text to display after the query results, if there are any

searchlabel:

Text for continuing the search

default:

The text to display if there are no query results

import-annotation:

Additional annotated data are to be copied during the parsing of a subject

propsep:

The separator between the properties of a result entry

valuesep:

The separator between the values for a property of a result

template:

The name of a template with which to display the printouts

named args:

Name the arguments passed to the template

userparam:

A value passed into each template call, if a template is used

class:

An additional CSS class to set for the list

introtemplate:

The name of a template to display before the query results, if there are any

outrotemplate:

The name of a template to display after the query results, if there are any

sep:

The separator between results

Sort options

Add sorting condition

ResultCodeDebugExtra

To embed this query inline into a wiki page use the code below.

{{#ask: [[Category:Computer, electronics]]
 |?Desc
 |?Projectimage=Image
 |?Licence
 |?ContainsPdfDrawings
 |?Firstin
 |?CadFilesAreInEditableFormat
 |format=template
 |limit=50
 |offset=0
 |link=none
 |sort=
 |order=asc
 |mainlabel=
 |template=ProjektResults
 |class=search_items_results_page pagination-container
}}

Results 1 – 50 previous 50 20 50 100 250 500 next 50

JSON CSV RSS RDF

Query log

{
    "query_string": "[[Category:Computer, electronics]]",
    "query_source": "SMWSQLStore",
    "query_time": "0.0402",
    "from_cache": false
}

Debug output SQLStore

ASK Query

[[Category:Computer, electronics]]

SQL Query

SELECT DISTINCT
t0.smw_id AS id,
  t0.smw_title AS t,
  t0.smw_namespace AS ns,
  t0.smw_iw AS iw,
  t0.smw_subobject AS so,
  t0.smw_sortkey AS sortkey, t0.smw_sort
FROM
`smw_object_ids` AS t0
INNER JOIN
(`smw_fpt_inst` AS t1
INNER JOIN
`t2` AS t2 ON t1.o_id=t2.id) ON t0.smw_id=t1.s_id
WHERE
t0.smw_iw!=':smw'
  AND t0.smw_iw!=':smw-delete'
  AND t0.smw_iw!=':smw-redi'
ORDER BY
t0.smw_sort ASC
LIMIT
55
OFFSET
0

SQL Explain

ID	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	ALL	PRIMARY				56		Using temporary; Using filesort
1	SIMPLE	t1	ref	s_id, o_id, s_id_2, o_id_2	o_id_2	5	oho_wiki_en.t2.id	13		Using index
1	SIMPLE	t0	eq_ref	PRIMARY, smw_id, smw_iw, smw_iw_2	PRIMARY	4	oho_wiki_en.t1.s_id	1		Using where

Auxilliary Tables

Temporary table t2
Recursively computed hierarchy for element(s) (516).
SELECT s_id FROM `smw_fpt_subc` WHERE o_id=516 LIMIT 1

Query Metrics

Query-Size:1
Query-Depth:0

Errors and Warnings

None

$10 DC Power Supply - 1 Day DIY

In this 1 Day do it yourself we take an old ATX size computer power supply and convert it into a handy, high current, DC power supply for ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

$3 Homemade Oscilloscope for Smartphones and Tablets

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

$3 Homemade Oscilloscope for Smartphones and Tablets.

A simple homemade oscilloscope that we will need later when designing our important project. This unit is fairly easy to make just ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(2)Power Supply Build;P1,Parts"n"Plans for the RIDEN RD6006.

Lets make a real portable powerstation-INSIDE-its own car Batt Case.24V DC+240V..But must be Quiet

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(DIY) Homemade Digital Speedometer

Its working Thanks to Jeff who originally created it ,modified by me ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(DIY) Three digit digital frequency meter with MM74C925 ...

This small frequency meter can measure any signal up to a maximum of 2Khz. It is based on the well-known Farchild MM74C925 chip. On the author's website we can...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(EASY) DIY Textured Photography Background DIY Styling Boards

Learn how to make your own textured

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(HD) Homemade Quadrocopter Test Flight Crius SE (M M Products)

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(How 2) Build a controllable power supply yourself Fascination with technology

In this video we show you how to build a controllable power supply. Have fun We assume no liability for ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(How2) Build experimental power supply yourself

Today in the video: How to use a commercial computer power supply an experimental power supply for your own applications ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(REVIEW/TUTO) SCANNER 3D do it yourself 100% IMPRIMABLE

On va voir ce que vaut vraiment ce scanner et si il est aussi simple d'utilisation qu'il le prétend... Pense à t'abonner si t'aime ce ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(en) Repscrap. do it yourself 3d printer from old printers and scanners.

This video is about a do it yourself 3D printer that I've made from few old inkjet printers and one scanner. Music from here: ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

(how 2) Build generator yourself

In this video, I'll show you how to build a small working generator yourself. Links: Wiring diagram: ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

,,Pi3D2: A small robot in self-construction "

Feb 03, 2019 - One of many ideas I had while browsing the net was to build my own little robot, inspired by R2-D2. Here would like

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

01 Construction of a 3D Printer - 01 Introduction (Hardware) (English / German)

This is the beginning of my video series about building a 3D printer. Complete from selecting the parts to the first ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

01- Diy Agriculture Drone Frame Manufacture -Tarım İlaçlama Dron Çerçeve Üretimi - Drones Agrícolas

Diy Agriculture Drone

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

05 "Thommis Werkstatt": We build a tachometer for the Kress 1050 FME milling spindle

Construction of a tachometer for the popular Kress 1050 FME milling spindle. The speed is indicated by a mark on the ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

06 Construction of a 3D Printer - 01 Electronics (English / German)

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

07- DIY Agriculture Drone-Pixhawk4 Montage-ArduPilot ESC Calibration-Fabricación de Drones Agrícolas 2

Pixhawk4 Montaj (Montage) ArduPilot ESC Kalibrasyon (Calibration)

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

 File:YTB.qDG2VHwYxys.jpg

08/10/19 Tesla's Blueprint: Quantum Energy Generator - here now for free

https://wirsindeins.files.wordpress.com/2014/03/qeg_3_dt.pdf https://wirsindeins.org/2014/03/26/qeg-frei-fur-alle/ ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

0x000F - do it yourself GPS Speedometer

This is a project introduction to my GPS speedometer. As I work on it I'll be doing check-in videos that show it's progress ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1 Wood Gas Generator. Ultimate Wood Gasifier Plans. Free Fuel for Life.

The Wood Gasifier Builder's Bible, a new book on wood gasification is being released on September 15, 2014.

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1-Day Project: $10 do it yourself Arduino Hygrometer Si7021 OLED

Build an Arduino-based humidity and temperature meter in just one day and for just $10. This design uses the Si7021 humidity ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1-Day Project: Build Your Own Arduino Uno for $5

Help support Julian's Arduino videos on Patreon: https://www.patreon.com/julian256 Clones of the popular Arduino Uno are now ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1. How to print your own (DIY) speedometer (instrument cluster)

How to print your own (DIY) speedometer (instrument cluster) - Part 1 Original instrument cluster underlay. Instrument cluster is ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

10 Arduino Projects with do it yourself Step by Step Tutorials

https://howtomechatronics.com/arduino-projects/? Find more details, circuit schematics and source codes on my official website.

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

10 Tips to make Seamless Paper Backgrounds last longer 2 do it yourself fixes for your photo studio backdrops

Seamless paper backgrounds are a staple item for both amateur and professional photographers. They are versatile, reusable ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

10 projects you can do yourself with Arduino

This video shows 10 projects that you can do yourself with Arduino. Then I show you the link where ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

10+ Best Spectrometer images labs diy, lab equipment, green laser ... 2

DIY Micro Volume Spectrophotometer. Attempt to build DIY Microvolume Spectrophotometers or Fluorospectrometers to quantitate micro-vo...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

10. How to print your own (DIY) speedometer (instrument cluster) - Assembly

How to print your own (DIY) speedometer (instrument cluster) - Part 10 Assemble the instrument cluster.

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

10kVA Dry-Type Transformer - Overview/Plans

Taking a look at my newest toy, a 10kVA Single Phase 600-120/240V Transformer. This is a standard dry-type distribution ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

11 Best do it yourself Kits for How to Make a Robot - Interesting Engineering

It does not matter if you are a kid or an adult, there is always a robot kit for that can help get you started with building your own plastic pal.March, 28th 20...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

11 Incredible Homemade Robots - Geek.com

It's the 21st century, and we were promised robots. Science fiction made us think that we'd have automated servants at home and at work, taking care of menial t...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

11 gram Arduino-powered laser rangefinder - do it yourself Drones

I was pleased to see a - I hope this project gets fully funded (and I'm a backer). I've actually been experimenting myself with structured light and laser range...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

112 How to make PAINTED FUNDS of Fabric for portraits?

In this video I share a tutorial to make painted fabric backgrounds inspired by the work of the great Sarah Opliphant ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

12-VOLT HOME BATTERY CHARGER FOR CAR AND SOLAR BATTERY

EVERY WEEK I WILL UPLOAD A VIDEO. If you liked it, like it or subscribe. I will discuss various very interesting topics of ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

12V LiFePO4 Battery for Motorhome DIY Solar Power System

12V LiFePO4 battery for motorhome

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

12V power supply with high performance - do it yourself instructions ...

17.03.2011 I might have to make up a little bit, defective computers mostly have a good PSU. The nameplate shows what it can do. It's a switching power supply,...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

12V vs 24V vs 36V at Nema 23 3D build your own printer Part 4

Nema 23 - http://amzn.to/2B2BYzbNema 34 + driver + power supply - http://amzn.to/2AXzBxrball bearings http://amzn.to ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

12X 1080P IR Laser Night Vision Drone Zoom Camera - do it yourself Drones

Sky Eye-12NL is one 1080P 12X zoom camera designed for multirotors to carry out night vision mission like inspection,surveillance,search and rescue,due to its p...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

12kw homemade generator

12kw continuos at 240 volts.

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

12v home portable generator

Made with 1 2-stroke brush cutter motor, 1 automotive heating engine, 1 battery, switch. cable, terminals and 1 ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1500w do it yourself Lab Power Supply with - ZXY6005S - LTC3780 - ZXY6010S

Ch1 - ZXY6005S ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

18650 Rechargeable battery for Li-Ion batteries under 3V with 50mA regenerate Reanimize do it yourself do it yourself build German

In this video, I'll show you how to gently recharge deeply discharged batteries. Please watch the first video, where I ...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1942 Homemade Battery Charger OneTubeRadio.com

Radio - Emergency Preparedness - Scouting - Law - PoliticsThe plans for this battery charger appeared in 75 years ago this month, October 1942.The only electron...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1Gbps networking connectivity for locations up to 100m apart, using an eye-safe infrared light beam.

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1Hz - 50MHz Frequency Meter Crystal Measurement do it yourself Kit with ...

Ship toAll CategoriesProduct keywordsSHOP BY DEPARTMENT- YELLOW 366551401Warehouse:Shipping:This product supports COD on delivery. Suggestions: Do not place ord...

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1Hz-50MHz Frequency meter DIY Kit with Case - NEW HOBBY Ltd.

This document describes the construction of small frequency counter with a cheap PIC microcontroller and a few seven-segment LED digits. - Frequency r

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

1Hz-65534Hz Frequency Meter DDS Function Signal Generator Diy ...

1Hz-65534Hz Frequency Meter DDS Function Signal Generator Diy Kit Frequency Generator Module-sale of low-price goods, in catalogue of products from ..

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

2 My projects, My double power supply, with 50V 5A, Deoppelnetzteil Selber bauen

Here I show you how I built my double power supply.

   Contains PDF Blueprints: No

   Contains CAD Files: No

License: unknown

Retrieved from "https://en.oho.wiki/wiki/Special:Ask"

OPEN HARDWARE OBSERVATORY 2020

|

|

|

Feedback for Beta Version

|

|