~j0ule

[url=https://sci-hub.se/10.1007/s12274-018-2139-0]https://sci-hub.se/10.1007/s12274-018-2139-0[/url] "Low-cost room-temperature sodium-ion batteries (SIBs) are expected to promote the development of stationary ene rgy storage applications. Howeve

The control PCB for the HandyVent is a simple circuit board made with through-hole components that are easy to solder. This short page will help you understand how to build it.  [img]../storage/fragment_images/10973986380014022_70ab1fa4b23a0295627249

It is a tale very commonly told that Lead Acid batteries are a “cheaper” solution than Lithium batteries for off-grid and solar storage. As of 2019 that is patently false, and the purpose of this article is to explain how this remarkable fact comes to

The goal of this project was to build an inexpensive portable x-ray machine, since such a device didn’t seem to exist! Odd, since such a machine could prove to be very useful in remote or underequipped areas such as army camps or poorer countries. T

Disposable cameras are a great source of moderately high voltage inverters. The flash circuit takes 1.5V and turns it into anywhere from 300 to 350 volts, and what's nice about these cameras is that you can go to any pharmacy, and if you ask nicely,

Never put an electrolytic capacitor in backwards. [youtube]3b7mjukhTyQ[/youtube][t]Why it happens[/t]Electrolytic capacitors are constructed using an electrolyte-soaked piece of paper between two strips of aluminum foil. One piece of foil is oxidized

A "ZVS driver" is a self resonant oscillator; a very simple circuit that can oscillate a large amount of power with little loss. It is normally used for making the sine wave needed for driving high frequency transformers such as those found in L

The microwave oven transformer is possibly one of the simplest methods of making some big high voltage arcs, mainly because they are robust, cheap, and easy to hook up.[img]../storage/fragment_images/79114536969562370_d47432c45ed03f967dbf1445f547852c.jpg[

You don't need lots of money to make high voltage capacitors, in fact some pretty decent ones can be made with some cheap and readily available materials. This is because capacitors are very simple devices consisting only of a dielectric and two plat

So here's the story: I ended up getting 8 fancy high voltage capacitors in a trade with @inducktion, and they ended up sitting on my shelf for about a month. A couple weeks later I came across a reel of 5000 glass 1kV ultrafast diodes on ebay, and af

By far the most common radiation detector, the Geiger-Müller tube itself is nothing more than a highly modified neon lamp. Its method of operation is rather simple. The GM tube is a partially evacuated tube containing low pressure inert gas; typicall

I've seen multiple designs for a plasma speaker online, and quite frankly most of them are not very good. Some problems I noticed were constantly blowing up MOSFETs, distorted audio, excessive heating of the MOSFET(s) etc. I was shown a nice circ

STMicro’s documentation about the subject is some of the most terse documentation I’ve ever seen in the business! This cheat sheet is a work-in-progress. The STM32 microcontroller family has 2 DMA controllers, and 16 DMA “streams”. Streams are

Ladies and gentlemen of teh internetz, I present to you a marvelous device that will revitalize your health and bring wondrous wealth and prosperity to your families and all future generations. Straight from Nikolai Tesla's labs I bring you a fantast

Transformers are not the only way one can boost voltage; another method to the madness is a Cockroft-Walton multiplier, or thes the Villard Cascade depending on your favorite dead scientist. “CWs”, as they are colloquially known, are a charge pump use

This is a project I took from conception, to sketch, to working design in about 4 month’s time. It is the most powerful handheld x-ray source in existence. You can build one too!  https://gitlab.com/j0ule/portable-x-ray/ [img]../storage/fra

Tektronix sent me a new TDS2024C! Now what do we do with new $1500 toys? WE RIP THEM APART (⌐■_■)っ═一 [t]The Finish[/t]Let’s look at this one from behind. Not much going on there, apart from a USB device port, FCC information, a kens

For whatever reason, Vedder never added shut down to the VESC 6.0, despite the power supply chip having this capability. Here is how to add it. [t]You will need...[/t]The following components: [ul][li]10K Resistor[/li][li]3.3V Zener Diode[/li][li]

Also referred to a Line Output Transformer, the flyback transformer is a high frequency, high voltage transformer most often used to power cathode ray tubes. Flybacks are capable of generating some decently high voltages, typically anywhere from 10 to 35k

Humans of the internet, I present to you the BlitzenKlavier (lightning-piano). It’s a large solid-state Tesla coil that takes in 120VAC, MIDI, and spits out 8 foot musical lightning bolts! [img]../storage/fragment_images/42879498820102740_cd3fac28b4

Before small #cockroft-walton multipliers became inexpensive x-ray machines used to use large iron transformers. These things are the highest voltage transformers you'll likely ever come across, turning 120V (or 240V in euroland) into 50,000V, 75,000