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Archive for the ‘DIY’ Category

Beacon Keyer

Thursday, April 27th, 2017

Lukas Fässler from Soldernerd published a project writeup showing how he built a PIC-based beacon keyer: This is likely the first ham radio related project that I document here on this blog But my very first PIC project was a beacon keyer that I made for my father, HB9BBD. That...

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Posted in DIY, PIC | 1 Comment »

DIY thermal vision shoots 360 panoramas

Wednesday, April 19th, 2017

Saulius Lukse has posted his DIY 360 panoramas: It might seem simple task but it involves some tricks to control motors and read sensor data from two separate controllers. One of the challenges I faced is meshing position and temperature data. Feedback received from each controllers is timestamped. After scan is...

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MPPT solar charger rev c

Friday, April 14th, 2017

Lukas Fässler from Soldernerd has been working on revised version of his MPPT Solar charger project: Over the last few weeks I have been quite busy with my MPPT Solar Charger project. I’ve built up a first board and started writing firmware for it. Since the last version was not...

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Homebrew PiHPSDR

Monday, April 3rd, 2017

g4fre built his own PIHPSDR, that is available at github: Having seen the Apache-labs version of the PIHPSDR I wanted to customise it to fill my needs, so I needed to build my own All the needed information , with the software, is at John Melton's github site github.com/g0orx/pihpsdr The...

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Posted in DIY, R-Pi | No Comments »

5V Regulator Cap for 9V battery

Saturday, March 18th, 2017

David Cook built a 5V regulator to sit atop a 9V battery: For quick portable projects and temporary hacks, it is often faster to reuse a simple 5V regulator circuit than to integrate a power supply into the device design. My toolbox has an LED tester and magnifier light, so...

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A Solid State QRP Rig from 1955!

Tuesday, March 14th, 2017

Pete Juliano, N6QW,  built his own vintage 1955 Solid State QRP Transmitter using the Philco SB-100: Recently my friend Bill, N2CQR posted data on his blog ~ soldersmoke.blogspot.com about a vintage late 1950's early 1960's 10 milliwatt 10 Meter transmitter. That was quite a feat! But given my Italian heritage...

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Posted in DIY, vintage | No Comments »

Temperature controlled etching bath with magnetic stirrer

Wednesday, March 8th, 2017

Michael writes, "Yet another temperature controlled etching bath for producing PCBs at home. But this one has a magnetic stirrer :) Check out the video after the break. Project info at acidbourbon's blog. Via the contact form. (more…)

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DIY laser scanning microscope

Monday, February 20th, 2017

Venkes shared detailed instructions of how to make a DIY Laser Scanning Microscope (LSM): The reason I was thinking of a DVD pick-up is that it houses a laser and a lens capable of projecting a spot of visible laser light small enough to "see" a bit on a DVD....

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Posted in Arduino, DIY | No Comments »

A Line-us clone

Monday, February 13th, 2017

Barton Dring has a nice build log on his Line-us clone project: I have been going to the monthly Amp Hour, Hardware Happy Hour meetup.  A lot of people bring something to show.  My projects are too big.  Also, you need to bring your own power.  The meetup standard seems to be running...

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HC 508 update

Monday, February 6th, 2017

An update on mc68k’s HC508 project we covered previously: Good news, some components have arrived today, so I have completed a few 50 MHz boards. More details at Amiga projects blog.

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DIY Heng Lamp

Thursday, February 2nd, 2017

Martin Raynsford shared detailed instructions of how to make a DIY Heng Lamp,  project instructables here: The HENG Balance lamp just successfully funded on Kickstarter, the design is pretty cool and unique so we decided to make a copy of it. At it's heart it's just an LED lamp with a simple micro...

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PSU burner

Tuesday, January 31st, 2017

Bob writes: What does one do when designing a power supply? Well, build a power supply tester, of course. One of the simplest things to build is a constant current load. This will allow for testing of the endurance of the power supply, as most of the designs out there...

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Remapcro: A hardware keyboard macro recorder

Friday, January 27th, 2017

Anthony Lieuallen has published new build, a hardware keyboard macro recorder: Remapcro I posted once recently about the prototype of this project, but as of today I've finished the first real one. The name Remapcro is a portmanteau of remap and macro, because that's what it does. It's an array of extra keys...

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DIY thermal imaging

Tuesday, January 24th, 2017

Niklas Roy has written an article detailing his DIY thermal imaging with an IR thermometer: I did not want to hack/destroy the brand new thermometer, as I still plan to use it in its original form later. For that reason, I decided to temporarily attach an old webcam to its back. This...

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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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Posted in DIY | 1 Comment »

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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Posted in DIY, wireless | No Comments »

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Recent Comments

  • Edward Mallon: I've managed to get cheap thermistors calibrated to about to +/- 0.2C with 3.3v Arduinos. https://edwardmallon.wordpress.com/2017/04/26/calibrating-oversampled-thermistors-with-an-arduino/ Instead of playing whack-a-mole with the various sources of...
  • Ja: What the keyer do? Sends random morse code or there is some input? If someone can point me to some source to read I would...
  • Sorin: Pleasure of free!
  • hli: Sunday++
  • Max: Jolly good stuff, although the "include 100 W resistors in series with the inputs and outputs" part is quite hilarious until one realizes* they meant...