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Archive for the ‘DIY’ Category

EMP Jammer build

Friday, January 20th, 2017

A how-to on making an EMP jammer from JunezRiyaz, project instructables here: An electromagnetic pulse (EMP), also sometimes called a transient electromagnetic disturbance, is a short burst of electromagnetic energy. Such a pulse may occur in the form of a radiated electric or magnetic field or conducted electrical current depending on the source....

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A 400W (1kW Peak) 100A electronic load using linear MOSFETs

Monday, January 16th, 2017

Kerry Wong built a 400W/100A electronic load using linear MOSFETs:  I bought a couple of IXYS linear MOSFETs (IXTK90N25L2) a while ago to test their capabilities when used as electronic load, and the result was quite impressive. So I decided to build another electronic load using both MOSFETs. As you can...

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Building an AT2XTKB (AT to XT) keyboard adapter on prototype board

Thursday, January 12th, 2017

Matt built an AT2XT keyboard adapter on prototype board using an AT to PS/2 keyboard cable. Project info at Matt's Tech Pages.

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DIY Arduino GRBL CNC with a laser

Wednesday, January 4th, 2017

[embed]http://www.youtube.com/watch?v=7kHqe4ddYzY[/embed] A DIY Arduino GRBL CNC with a laser from Bob Davis. Project info at Bob Davis' blog.

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Minstrel ZX80 clone

Tuesday, January 3rd, 2017

Dave Curran has a nice build log on his ZX80 clone, which he call Minstrel: Here is a new ZX80 clone that I have called the Minstrel. It is a fairly accurate clone electrically to the ZX80, using the same chips and the original schematic with only a few concessions to the modern world....

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DIY IKEA wireless Qi charging for the Hexiwear

Thursday, December 29th, 2016

Erich Styger built a DIY a wireless charging system for the Hexiwear: The Achilles Heel of the Mikroelektronika Hexiwear is its charging: the charging and USB connector are only designed for a limited number of plug-unplug cycles, and it does not have a wireless charging capability like the Apple iWatch....

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Homebrew 40dB step attenuator

Wednesday, December 28th, 2016

flathagen blogged about his step attenuator build: A home lab needs a step attenuator. It helps in evaluating RF amplifiers, filters and receivers. Both the legendary EMRFD-book, the ARRL handbook, and a variety of QST-articles provides circuit examples for building a homebrew device. Most of them follow the design principles...

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Tiny-TS: An open-source DIY touch synthesizer

Friday, December 23rd, 2016

Jan Ostman has a nice build log on his open-source DIY touch synthesizer the Tiny-TS, that is available on Hackster.io: The Tiny TS is a credit card sized (100x65mm) fully open-sourced synthesizer with a 1-octave capacitive touch keyboard. Check out the video after the break. (more…)

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Automation platform: ActoSenso Nodes

Thursday, December 22nd, 2016

Viktor Takacs just published the second part of a series on his automation platform, which he call ActoSenso Platform.  This second post of a series discussed about some of the nodes that can be used in ActoSenso Platform: ActoSenso Nodes are small hardware devices that are the "eyes", "ears" and "hands"...

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Homebrew WiFi shield

Monday, December 12th, 2016

m0xpd has published a new build, the homebrew WiFi shield: Having just finished development of the new m0xpd / Kanga ESP8266 - AD9834 board, I find myself with a few WiFi components knocking about on the bench - so I figured it would be fun to try to make a...

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Semiconductor radioactivity detector

Monday, December 12th, 2016

Robert Gawron has been working on a semiconductor radioactivity detector project: Currently I'm trying to make a working version of a radioactivity detector that uses semiconductor as a sensor. It's a different approach than Geiger-Muller detectors, more complicated, but also much more interesting. While Geiger-Muller counters can only provide information...

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Big F’n 3D printer build

Tuesday, November 29th, 2016

Dan Beaven blogged about his big 3D printer build: Summary of Features: 8 Cubic foot print volume (capable of larger with minor changes - i.e bigger cast aluminum plate) - The reason I chose 1/4" Cast Aluminum plate was to make sure it was dimensionally stable when heated.  Anything else...

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36dB power attenuator for 20W

Saturday, November 19th, 2016

Lex PH2LB designed and built a 36dB power attenuator for 20W using PA1B power attenuator calculator: The attenuator can handle a maximum power of 20 watt and is used to reduce the power of a 5 watt transceiver. At first I did not realized why Lex designed the attenuator for 20...

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100W AF dummy load

Friday, November 11th, 2016

Dilshan Jayakody has published a new build: This is a quick post to showcase 100W 4 channel AF dummy load which we build to test the output stages of audio power amplifiers. This dummy load use 4, 8Ω 100W wire wound resistors which are available in eBay. In this unit all...

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DIY Arduino ProMini data logger

Friday, October 28th, 2016

Ed Mallon blogged about his DIY ProMini data logger build: Typical pro-mini loggers built with this design sleep at 0.25mA, before extra sensors are added. At that current draw, the logger should deliver approximately six months of operation on three brand new AA batteries with a 15min duty cycle; depending...

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Input filter and preamplifier – Jupiter modular receiver

Tuesday, October 18th, 2016

Vasily Ivanenko blogged about his input and RF preamplifier build: Above — Build of the input and RF preamplifier stage. I put in a 0 or 6 dB attenuator right at the input. That's double-sided Cu+ board with copper vias joining the 2 surfaces intermittently and also at crucial ground points....

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Classic vintage vacuum tube oscillator

Tuesday, October 18th, 2016

Vladislav Damyanov shares his vacuum tube oscillator project: The above you see is a result of my work in which i tried to go Vintage with my design. I was talking about the usage of Vacuum tubes when i mention the word Vintage, am pretty sure you will agree to it...

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MPPT solar charger

Friday, October 14th, 2016

Lukas Fässler has designed and built an MPPT solar charger: One of my main goals with this design is to archieve very low standby current, somewhere in the tens of microamps. The basis for this is a low-power buck on the basis of a Texas TPS62120 where the microcontroller can...

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Arduino Mega EPROM programmer

Friday, October 14th, 2016

An Arduino Mega Eprom Programmer project from Robson Couto, that is available on github: Recently I acquired a SNES. But it only came with a bootleg Mortal Kombat cartridge. Searching for games I found a lot of repro cartridges (Cartridges with the ROM swapped) being sold at local second hand...

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Automatic volume tracking for a TV

Wednesday, October 5th, 2016

An automatic volume tracker by KA7OEI: It occurred to me that I did have a reference on which I could base an outboard volume control: The internal speakers of the TV. I surmised that I could "listen" to the audio level coming out of the speakers and based on that, adjust the...

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Posted in DIY, hacks | 2 Comments »

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