Instructables: exploring - technology - electronics - voltage Thu, 27 Nov 2014 16:23:24 PST BLOX v1.01 2A Variable DC Power Supply for $5
2A Variable DC Power Supply for $5 - More DIY How To Projects]]> tgvoss I have seen others building electronic variable power supplies from scratch with lots of parts. It usually ends up being over $20. This can be built in half the time and half the price. 4 - 40 VDC Input 1.25 - 37 VDC OutputDC - DC Step Down - $4.91 12V Power Supply - $2.18 Connector Leads - $3.85 (O...
By: tgvoss

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Thu, 20 Nov 2014 11:18:04 PST
Using the HY1803D Power Supply
Using the HY1803D Power Supply - More DIY How To Projects]]> SLOMakerSpace The HY1803D is a reasonably priced power supply that will provide suitable power for many low-power electronics projects. From the manual, the specifications are:Voltage Output: 0 V-18 V DC ± 1% in increments of centivolts (0.01 V)Current Output: 0A - 3A ± 2% in increments of centiamps (0.01 A)Opera...
By: SLOMakerSpace

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Thu, 30 Oct 2014 16:25:14 PDT
Li - Ion battery level indicator
Li - Ion battery level indicator - More DIY How To Projects]]> Osvaldas Are you looking for a simple circuit to measure your Lithium Ion single cell charging and discharging level? Here is one chip circuit, powered up from the same Lithium Ion battery you want to measure.This circuit is design to measure 3.7V rechargeable batteries level. 4.2V - 100%; 4V - 80%; 3.8V - ...
By: Osvaldas

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Tue, 21 Oct 2014 13:28:44 PDT
Penny Battery
Penny Battery - More DIY How To Projects]]> l33tn00b Hello and welcome to my first instructable!!! I want to start posting all my projects on here so I figured I would post one of my favorites, the penny battery!!!This is a great project to know for those into survival. What I have done to expand this project is hook my homemade penny battery to a j...
By: l33tn00b

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Mon, 6 Oct 2014 15:17:14 PDT
Easy high voltage fly swatter mod
Easy high voltage fly swatter mod - More DIY How To Projects]]> The Freak Caution - High voltage. Keep away from children and pets. I am not responsible for any form of harm done to yourself or others. So, having said that, I always wanted to adapt a fly swatter to something more serious. Standard electric fly swatters handle what I think to be about 600 to 1000V, this mo...
By: The Freak

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Sat, 20 Sep 2014 07:28:54 PDT
Sealed battery box 12v/24v with a switch
Sealed battery box 12v/24v with a switch - More DIY How To Projects]]> RehabIsForQuitters In this instructable I will show you how to build a sealed battery box. It's not completely water tight but rain is no problem for it. Since building this I have found it to be a great mobile power supply for many things even running power tools while camping where there are no electric hookups.The ...
By: RehabIsForQuitters

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Thu, 21 Aug 2014 12:49:03 PDT
Coilgun - More DIY How To Projects]]> Djnix I came up with my own design so I'm not going to tell you how to do yours. I only ask that you cover any exposed wires to prevent electrical shock. The voltage is high enough to Hurt you badly. Materials PVC Charging circuitProjectileThyristor WiresTrigger switchHot glue400v capacitors (I used 82...
By: Djnix

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Sat, 26 Jul 2014 10:55:45 PDT
AC to DC Conversion
AC to DC Conversion - More DIY How To Projects]]> brmarcum Every once in a while I come up with an idea for a circuit or device that has applications where a battery may not be the best or most convenient option for a power supply. One example is the Motion Activated AC Switch that I built. Since I was wanting to have the switch open a relay to allow AC cur...
By: brmarcum

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Tue, 1 Jul 2014 14:24:04 PDT
Battery Tester and Charger
Battery Tester and Charger - More DIY How To Projects]]> Khaleel123 The Objective of this project is to test batteries to find out if they hold a significant charge and are still usable. I recently had a laptop battery fail and after taking it apart I realized I needed a quick way to test each individual 3.7 volt lithium ion cell. As a result this is what I came up ...
By: Khaleel123

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Wed, 18 Jun 2014 22:19:57 PDT
Basic 5 Volt Power Supply
Basic 5 Volt Power Supply - More DIY How To Projects]]> JayconSystems The first part of any electronics project, is a power supply. Some projects use the USB port on your computer; others use a cheap wall adapter. Some are battery powered, and others are solar. With all these different options, how does one power their electronics project? Let us show you!It’s pretty ...
By: JayconSystems

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Fri, 6 Jun 2014 08:58:54 PDT
555 Voltage Doubler
555 Voltage Doubler - More DIY How To Projects]]> MrSirLRD Batteries are a great way to add portable power to your project/device but often you require higher voltages than a single (or multiple) batteries can provide, this usually means connecting many batteries together to get the required voltage (which could add unwanted weight).This Instructable uses a...
By: MrSirLRD

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Fri, 30 May 2014 19:29:34 PDT
Variable Bench Power Supply with Active Cooling
Variable Bench Power Supply with Active Cooling - More DIY How To Projects]]> Khaleel123 I needed a new bench power supply that would be variable and inexpensive. I decided to reuse an old laptop power adapter that was not being used anymore and it gave me a nice filtered 19 volts DC. I then made up the circuit for the LM350 Variable voltage regulator on a breadboard to make sure it wor...
By: Khaleel123

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Sun, 27 Apr 2014 15:16:18 PDT
Rail/Coil Gun
Rail/Coil Gun - More DIY How To Projects]]> Sam Patton I was told that I couldn't buy a BB gun, so instead I made my own version of a railgun that fires 320 Joules in a split second. I was able to pierce my garage door, but I had the switch blow up on me so I'm waiting to install the new high voltage switch. WARNING THIS IS NOT LIKE A BB GUN. Used com...
By: Sam Patton

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Sun, 20 Apr 2014 11:41:37 PDT
100 000 volt flyback setup
100 000 volt flyback setup - More DIY How To Projects]]> Magnetron so i am one of those people who want's high voltage but don't have the buck's to buy one of those expensive neon sign transformers so i stumbled on to one of this guy's idea on how to build a simple flyback driver with a cfl ligt i hope he will forgive me for kind of steeling this idea but with his ...
By: Magnetron

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Mon, 3 Feb 2014 06:45:19 PST
The Best and Easiest Way to Drive your Flyback
The Best and Easiest Way to Drive your Flyback - More DIY How To Projects]]> corbonzo In this instructable I'll be showing you a super simply way to drive your flybacks! because i know for a fact that I'm tired of transistor type drivers and even the ZVS's are a pain. So get ready for this because I'm sure it'll make you excited as it did for me! heres my video tutorial for some mo...
By: corbonzo

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Fri, 31 Jan 2014 20:32:23 PST
add a digital meter to your old analogical variable PSU
add a digital meter to your old analogical variable PSU - More DIY How To Projects]]> andrea biffi My 20 years old variable power supply is beginning to have some imprecision in measuring voltage with his analogical meter. Then I decided to add a digital meter, with which I can know exactly the voltage supplied. Since these digital meters are very cheap this is a good solution for many devices ot...
By: andrea biffi

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Sat, 18 Jan 2014 07:25:25 PST
Index Finger Voltmeter [a way to meter DC voltage without holding your meter] limbo This is an idea to help low voltage (DC) field technicians like me.   The problem: When you are working in strange places to like basements, storage rooms, or when you are using a ladder to access a distant (LOW VOLTAGE) equipment  holding the multimeter and the probes is a pain in the... :-)  Well...
By: limbo

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Thu, 14 Nov 2013 12:17:46 PST
Create A Negative Power Supply For An Analog Circuit
Create A Negative Power Supply For An Analog Circuit - More DIY How To Projects]]> mdtevans Many analog circuits, for example opamps, require a negative power supply rail. e.g. 5V, 0V and -5V. This instructable describes how to create a -5V supply from a 5V and 0V only supply. This is particularly useful if you are using power supplied by a microcontroller board like the arduino. Use a...
By: mdtevans

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Sat, 9 Nov 2013 06:51:58 PST
How to create +/- voltage using one power supply
How to create +/- voltage using one power supply - More DIY How To Projects]]> Andrewsheen In analog synthesis, to generate almost any signal with op amps, it is necessary to have positive and negative voltages. This allows the op amp to generate a signal that spans positive and negative voltage values. this process is pretty simple when using 2 different power supplies, but to create it...
By: Andrewsheen

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Sat, 28 Sep 2013 10:11:56 PDT
Singing Arc Plasma Speaker project - revision 2.0!
Singing Arc Plasma Speaker project - revision 2.0! - More DIY How To Projects]]> -max- You've probably seen my last, failed singing arc project. I decided to give it a second attempt. Anyway, I believe I know what went wrong, which I covered in the last instructable. So after realizing that driving an inductor or transformer in the flyback mode of operation will basicly lead to failu...
By: -max-

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Tue, 30 Jul 2013 20:13:25 PDT
DIY Electronic Cigarette
DIY Electronic Cigarette - More DIY How To Projects]]> MrRedBeard There is a problem with the circuit. Please see the comment from Zanderist below. So when I wanted to quit smoking I tried an electronic cigarette. They were expensive and didn't produce enough vapor for me. I figured hey it can't be that hard and decided to look into making my own. Approximate co...
By: MrRedBeard

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Fri, 5 Jul 2013 11:42:26 PDT
Smartphone Charger Powered by Fire
Smartphone Charger Powered by Fire - More DIY How To Projects]]> 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
Adjustable Voltage Step-up (0.7-5.5V to 2.7-5.5V)
Adjustable Voltage Step-up (0.7-5.5V to 2.7-5.5V) - More DIY How To Projects]]> Joohansson Introduction: A voltage step-up is a circuit that increases the voltage. It can be AC/AC, AC/DC, DC/AC or DC/DC. This voltage step-up is a DC/DC adjustable voltage regulator. Usually a voltage regulator is fed by a higher input than output voltage, for example 9V IN to 5V OUT. This circuit will take...
By: Joohansson

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Wed, 1 May 2013 11:00:03 PDT
ATX Desktop Computer Power Supply
ATX Desktop Computer Power Supply - More DIY How To Projects]]> Kante Tech So I realize that after viewing multiple instructables and creating multiple projects I was using up batteries like crazy. I decided to wire up my own power supply after doing a quick search. My power is capable of your standard voltage of 3.3, 5, and 12. This setup and process that it took to creat...
By: Kante Tech

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Tue, 16 Apr 2013 21:26:37 PDT
Voltage Amplifier
Voltage Amplifier - More DIY How To Projects]]> CarolynCross A voltage amplifier in simplest form is any circuit that puts out a higher voltage than the input voltage.  When you are forced to work with a set amount of voltage, these amplifiers are commonly used to increase the voltage and thus the amount of power coming out of a circuit. This is useful for re...
By: CarolynCross

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Mon, 1 Apr 2013 20:25:43 PDT
Thermoelectric Fan Powered by a Candle 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
building the poor-mans mini tesla coil ( slayer exciter )
building the poor-mans mini tesla coil ( slayer exciter ) - More DIY How To Projects]]> -max- A slayer exciter is basically a small solid state tesla coil, usually a one transistor design. The circuitry for it is simple. One of the first things anyone who has built a joule thief will notice, is that the circuitry is very similar. The biggest difference is that the small transformer or induct...
By: -max-

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Fri, 22 Mar 2013 14:34:24 PDT
Easy Voltage Regulator for $25 Beta Mode I will teach you how to make it very soon! Please vote for the Kids-Only contest! Comment, Vote and Rate!
By: Beta Mode

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Fri, 1 Mar 2013 01:00:21 PST
Make a small, but powerful 30KV Van De Graaff generator
Make a small, but powerful 30KV Van De Graaff generator - More DIY How To Projects]]> -max- What is a Van de Graaff generator? you might wonder, well It is an electrostatic machine that builds up an extremely high voltage charge on a metal sphere. It was invented by Robert J. Van de Graaff in 1929. it works like this: you know how when you scuff your socks on a carpet, and then get that n...
By: -max-

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Wed, 23 Jan 2013 19:53:37 PST
Battery voltage monitor
Battery voltage monitor - More DIY How To Projects]]> chunkyhampton This voltage monitor has been designed to remotely display battery voltage so that people monitor and maintain their batteries easily. It was designed for use on off-grid reneable energy systems (such as my solar PV system), but it would also be useful to anyone who has a lead-acid battery, such as ...
By: chunkyhampton

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Wed, 14 Nov 2012 03:43:59 PST
Battery Voltage Indicator Autonomous96 Background: A year ago, heavy rain and ice overnight caused Skimmer (my small motor boat) to capsize due to failure of the bilge pump battery. In order to prevent this disaster from re-occur I made this indicator to monitor the bilge pump battery voltage status. The LED light mounted on the dashboar...
By: Autonomous96

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Mon, 17 Sep 2012 23:54:33 PDT
Jacob's Ladder
Jacob's Ladder - More DIY How To Projects]]> 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
Relation Between Volt Current and Resistance. lijoppans The relationship between Volt, Current and Resistance (Ohm's Law) is express in a simple manner.
By: lijoppans

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Fri, 17 Aug 2012 08:56:21 PDT
Voltage Tree BooRan This is a handy technique when designing circuits. Sometimes you don't have the voltage access you need for a circuit.  Whether you're using a Bench-top supply that doesn't have enough output options, or you only have batteries on hand, this is an easy way to get multiple voltages from one source wi...
By: BooRan

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Thu, 26 Jul 2012 09:15:05 PDT
Split rail power supply from a single rail supply Harrymatic A split rail power supply is one with a positive voltage rail, a negative voltage rail and zero volts in the middle. This is a really simple but very handy circuit which will provide both a positive and a negative voltage from a single rail power supply. This circuit was originally from a fairly ol...
By: Harrymatic

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Fri, 29 Jun 2012 14:54:29 PDT
Simple Voltage Divider DoctorDv When building a circuit, there may come a time when you only need a fraction of the voltage that is in the input.  Dividing this voltage is simple and requires a few basic components. You are going to need two resistors of the same value, and a battery.  The reason we are using two resistors of the...
By: DoctorDv

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Wed, 27 Jun 2012 11:37:39 PDT
Custom Battery Values randofo When you put two battery holders in series, they add together to make one larger voltage. For instance, if you put a 4 x AA (6V) in series with another 4 x AA (6V) battery holder, then you are left with a combined value of 12V. If you were then to put a 2 x AA (3V) battery holder in series with both...
By: randofo

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Mon, 25 Jun 2012 12:05:00 PDT
Voltage Source inside a gamecube ero619 So our first circuits project was to build a power source, so my girlfriend and i decided to build it on a gamecube and add some extras besides the power source, like a usb port to charge almost any usb-rechargable electronic. The power source can give a voltage between 1V and 20V on the left burne...
By: ero619

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Sat, 12 May 2012 00:50:11 PDT
Make a cheap disposable camera capacitor bank
Make a cheap disposable camera capacitor bank - More DIY How To Projects]]> Alex1M6 This instructable will show you have to make a simple capacitor bank and charger out of old disposable cameras that you can get for free at your local store. You can then use it for powering things such as coil guns or just blowing things up! See the second picture above? that was the spark created...
By: Alex1M6

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Sat, 5 May 2012 08:20:34 PDT
Precision multimeter calibration reference
Precision multimeter calibration reference - More DIY How To Projects]]> throbscottle WARNING / DISCLAIMER: If it ain't broke, don't fix it. Tampering with the settings inside your multimeter will void the warranty, could mess up it's accuracy permanently, risks causing mechanical failure, and could feasibly cause actual danger from high voltages. I accept no responsibility for any d...
By: throbscottle

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Sat, 14 Apr 2012 14:56:14 PDT
Reverse Engineering an Electric Fence Charger
Reverse Engineering an Electric Fence Charger - More DIY How To Projects]]> LargeMouthBass Reverse engineering something can be a great form of both entertainment and education.  I’ve often purchased items just for the satisfaction of disassembling them to determine how they function and how they are designed.  Along the way you can learn a great deal, improving your own design and debugg...
By: LargeMouthBass

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Mon, 2 Apr 2012 10:56:00 PDT
Solid State Tesla Coil
Solid State Tesla Coil - More DIY How To Projects]]> Michael Chen A solid state Tesla coil is one of the kinds of Tesla coils available. It has several advantages over the more common spark gap tesla coil. They are less louder than conventional Tesla coils, yet they can still achieve a respectable output. They can also be made to play music through its spark, whic...
By: Michael Chen

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Mon, 6 Feb 2012 18:33:04 PST
2n3055 flyback transformer driver for beginners
2n3055 flyback transformer driver for beginners - More DIY How To Projects]]> Alex1M6 Intro: This instructable will show you how to make a cheap and simple driver circuit in order to get high voltage arcs out of a component called a flyback transformer. A flyback transformer, sometimes called a line output transformer are used in older CRT TV's and computer monitors to produce the ...
By: Alex1M6

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Tue, 20 Sep 2011 20:36:21 PDT
Some of my plasma speakers Alex1M6 Plasma speaker using a flyback transformer. It uses an SG3525 chip to switch two MOSFET's in a half-bridge fashion. You can make one using a simple 555 timer circuit here
By: Alex1M6

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Thu, 15 Sep 2011 20:57:41 PDT
Jacobs ladder high voltage and current - video Alex1M6 A Jacobs ladder powered by my ZVS flyback driver. Using two bare conductors parallel from each-other with a small gap at the bottom and getting wider, as the ionised air heats up the arc will rise as the ionised air does until the gap gets too wide to support the arc when it will break. The proce...
By: Alex1M6

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Sat, 3 Sep 2011 07:06:49 PDT
Easy, quick and cheap homemade high voltage capacitor Alex1M6 Homemade high voltage capacitor made from aluminium foil and plastic container lids.
By: Alex1M6

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Mon, 29 Aug 2011 03:41:02 PDT
ZVS flyback driver photos Alex1M6 Photos of my ZVS flyback driver and some information added in the image notes.
By: Alex1M6

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Sun, 28 Aug 2011 10:37:39 PDT
Homemade high voltage pulse transformer video Alex1M6 I made this by winding lots of 40SWG wire around a PVC pipe and then covering it in electrical tape. I then used some 2.5mm2 house wiring cable as a primary coil and pulsed 1.2kV DC using one of those hand-held bug zappers through a spark gap and a timing capacitor of 0.047uF and the result is a hig...
By: Alex1M6

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Sat, 27 Aug 2011 06:21:05 PDT
ZVS flyback transformer video Alex1M6 My ZVS flyback transformer driver operating on 24V. I am using two 12v sealed lead acid battery's in series for 24V for the power source. What happens if you put salt on the electrodes?
By: Alex1M6

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Tue, 23 Aug 2011 21:14:11 PDT
Simple electronic fencer Uglymudda I have two jack russle dogs who love to rip up flowers, much to my partners annoyance, so I desided to have a root around in my project parts box and see what I could come up with. Low and behold I found that I had an old ignition coil from an old retired Mercedes car of mine, all I needed to do w...
By: Uglymudda

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Tue, 5 Jul 2011 13:31:11 PDT