Instructables: exploring - technology - current - popular http://www.instructables.com Sun, 20 Apr 2014 02:55:50 PDT BLOX v1.01 Emergency Light/Charger from Fire & Water http://www.instructables.com/id/Emergency-LED-powered-by-Fire/
Emergency Light/Charger from Fire & Water - More DIY How To Projects]]> http://cdn.instructables.com/F4P/Z6AJ/HGH70RF2/F4PZ6AJHGH70RF2.SQUARE2.jpg http://cdn.instructables.com/F4P/Z6AJ/HGH70RF2/F4PZ6AJHGH70RF2.SQUARE.jpg http://cdn.instructables.com/F4P/Z6AJ/HGH70RF2/F4PZ6AJHGH70RF2.SMALL.jpg Joohansson DIY a really simple Thermoelectric Emergency Generator from very few parts. Optimized for powering with tealights/candles. With inspiration from my previous projects: http://www.instructables.com/id/Thermoelectric-Fan-Driven-by-a-Candle/ and http://www.instructables.com/id/Battery-Charger-Powered-b...
By: Joohansson

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Thu, 16 May 2013 00:04:27 PDT
Smartphone Charger Powered by Fire http://www.instructables.com/id/Battery-Charger-Powered-by-Fire/
Smartphone Charger Powered by Fire - More DIY How To Projects]]> http://cdn.instructables.com/F12/HOAD/HFPTEVTJ/F12HOADHFPTEVTJ.SQUARE2.jpg http://cdn.instructables.com/F12/HOAD/HFPTEVTJ/F12HOADHFPTEVTJ.SQUARE.jpg http://cdn.instructables.com/F12/HOAD/HFPTEVTJ/F12HOADHFPTEVTJ.SMALL.jpg Joohansson Portable, Compact and Adjustable ThermoElectric Emergency Generator. Background: The reason for this project was to solve a problem I have. I sometimes do several days of hiking/backpacking in the wild and I always bring a smartphone with GPS and maybe other electronics. They need electricity a...
By: Joohansson

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Wed, 1 May 2013 11:03:17 PDT
Thermoelectric Fan Powered by a Candle http://www.instructables.com/id/Thermoelectric-Fan-Driven-by-a-Candle/ http://cdn.instructables.com/FAL/IAK8/HEXSGBOS/FALIAK8HEXSGBOS.SQUARE2.jpg http://cdn.instructables.com/FAL/IAK8/HEXSGBOS/FALIAK8HEXSGBOS.SQUARE.jpg http://cdn.instructables.com/FAL/IAK8/HEXSGBOS/FALIAK8HEXSGBOS.SMALL.jpg Joohansson A Thermoelectric generator powered by a tealight. It started as an experiment of how much power I could get from one candle. But I liked the idea and it worked really well so I built this electric-mechanical ornament. I did not use a high temperature TEG-module, but instead a cheap TEC-module. That ...
By: Joohansson

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Sat, 30 Mar 2013 03:04:10 PDT
Power LED's - simplest light with constant-current circuit http://www.instructables.com/id/Power-LED-s---simplest-light-with-constant-current/
Power LED's - simplest light with constant-current circuit - More DIY How To Projects]]> http://cdn.instructables.com/FTS/4FLM/1T0EWIFNSHT/FTS4FLM1T0EWIFNSHT.SQUARE2.jpg http://cdn.instructables.com/FTS/4FLM/1T0EWIFNSHT/FTS4FLM1T0EWIFNSHT.SQUARE.jpg http://cdn.instructables.com/FTS/4FLM/1T0EWIFNSHT/FTS4FLM1T0EWIFNSHT.SMALL.jpg dan Here's a really simple and inexpensive ($1) LED driver circuit. The circuit is a "constant current source", which means that it keeps the LED brightness constant no matter what power supply you use or surrounding environmental conditions you subject the LED's to. Or to put in another way: "this is ...
By: dan

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Mon, 8 Jan 2007 09:02:43 PST
Jacob's Ladder http://www.instructables.com/id/Jacobs-Ladder-1/
Jacob's Ladder - More DIY How To Projects]]> http://cdn.instructables.com/FZG/OPAE/H6WG6KCR/FZGOPAEH6WG6KCR.SQUARE2.jpg http://cdn.instructables.com/FZG/OPAE/H6WG6KCR/FZGOPAEH6WG6KCR.SQUARE.jpg http://cdn.instructables.com/FZG/OPAE/H6WG6KCR/FZGOPAEH6WG6KCR.SMALL.jpg hackmattr A Mad Scientist laboratory is not complete without a Jacob's Ladder. If you have always wanted one as a prop for Halloween or just to display, then this instructable will show you how to build one. It is very simple to make and you only need two components to make it happen. Please vote for me for ...
By: hackmattr

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Mon, 10 Sep 2012 14:09:38 PDT
Super simple high power LED driver http://www.instructables.com/id/Super-simple-high-power-LED-driver/
Super simple high power LED driver - More DIY How To Projects]]> http://cdn.instructables.com/FNV/CWO9/FDYPTCX6/FNVCWO9FDYPTCX6.SQUARE2.jpg http://cdn.instructables.com/FNV/CWO9/FDYPTCX6/FNVCWO9FDYPTCX6.SQUARE.jpg http://cdn.instructables.com/FNV/CWO9/FDYPTCX6/FNVCWO9FDYPTCX6.SMALL.jpg Artificial Intelligence This Instructable will show you how to built a Constant Current for high power LEDs, using only two components.High power LEDs are getting cheaper and cheaper, however the constant current drivers, to drive them are pretty expensive.Here, I'll show you how to built a simple and cheap, yet very effec...
By: Artificial Intelligence

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Wed, 19 Mar 2008 07:20:53 PDT
EVERYONE Needs a Multi-Meter http://www.instructables.com/id/EVERYONE-Needs-a-Multi-Meter/
EVERYONE Needs a Multi-Meter - More DIY How To Projects]]> http://cdn.instructables.com/FMN/BH39/GNRSXWG0/FMNBH39GNRSXWG0.SQUARE2.jpg http://cdn.instructables.com/FMN/BH39/GNRSXWG0/FMNBH39GNRSXWG0.SQUARE.jpg http://cdn.instructables.com/FMN/BH39/GNRSXWG0/FMNBH39GNRSXWG0.SMALL.jpg Phil B A multi-meter can save the average person a lot of money over a few years, even though ladies who choose to buy one may not carry it in their purse when going out for the evening. You will often be able to solve many problems yourself in less time than it would take to get a technician to come to yo...
By: Phil B

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Mon, 16 May 2011 16:05:31 PDT
How to Make AC Powered "Batteries" for your DC Powered Devices http://www.instructables.com/id/How-to-Make-AC-Powered-Batteries-for-your-DC-Pow/
How to Make AC Powered "Batteries" for your DC Powered Devices - More DIY How To Projects]]> http://cdn.instructables.com/FG1/UAJ6/GAK6BJK4/FG1UAJ6GAK6BJK4.SQUARE2.jpg http://cdn.instructables.com/FG1/UAJ6/GAK6BJK4/FG1UAJ6GAK6BJK4.SQUARE.jpg http://cdn.instructables.com/FG1/UAJ6/GAK6BJK4/FG1UAJ6GAK6BJK4.SMALL.jpg lspcrash I made this copier recently, based on a digital camera and a stand. I dig it. I also made a few modifications, one of which I show in this instructable. The digital camera I use runs on 2,000 AA batteries, though it uses only 2 at the time. But it eats through these things. It laughed at rechargeab...
By: lspcrash

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Fri, 18 Jun 2010 08:37:28 PDT
High Power LED Driver Circuits http://www.instructables.com/id/Circuits-for-using-High-Power-LED-s/
High Power LED Driver Circuits - More DIY How To Projects]]> http://cdn.instructables.com/F6F/YXSP/V4WEWOF30G6/F6FYXSPV4WEWOF30G6.SQUARE2.jpg http://cdn.instructables.com/F6F/YXSP/V4WEWOF30G6/F6FYXSPV4WEWOF30G6.SQUARE.jpg http://cdn.instructables.com/F6F/YXSP/V4WEWOF30G6/F6FYXSPV4WEWOF30G6.SMALL.jpg dan High-power LED's: the future of lighting! but... how do you use them? where do you get them? 1-watt and 3-watt Power LED's are now widely available in the $3 to $5 range, so i've been working on a bunch of projects lately that use them. in the process it was bugging me that the only options anyone...
By: dan

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Mon, 8 Jan 2007 08:59:56 PST
LED Replacement Fluorescent Tube http://www.instructables.com/id/LED-Replacement-Fluorescent-Tube/
LED Replacement Fluorescent Tube - More DIY How To Projects]]> http://cdn.instructables.com/FV0/D02M/FYNT9I6T/FV0D02MFYNT9I6T.SQUARE2.jpg http://cdn.instructables.com/FV0/D02M/FYNT9I6T/FV0D02MFYNT9I6T.SQUARE.jpg http://cdn.instructables.com/FV0/D02M/FYNT9I6T/FV0D02MFYNT9I6T.SMALL.jpg computerwiz_222 In this instructable, I will try and outline all of the steps required to create an LED fluorescent replacement tube. This instructable is provided more as a guideline, you can change almost anything in here to suit your needs. The lamp I created contained 87 LEDs, and this guide provides instructio...
By: computerwiz_222

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Sat, 22 Aug 2009 22:41:22 PDT