Mare published a new build: Low noise amplifiers are very useful. I built one with single BFG425W transistor with adjustable bias current. Project info at Mare & Gal Electronics homepage.
Category Archives: DIY
DIY NAS
A DIY NAS project from Peter Scargill: So I’ve had a fair experience of these systems. Well, this blog entry isn’t about expensive NAS systems. It’s about a cheap one… really cheap that is – and DIY. How cheap? Well, about £12 depending on what you have handy. For this price you need a handy 2.5” […]
TB timer – Timed camera cable release
Steve Smith has published a new build: It’s taken some research but I have built a prototype with my trusty ARDX Arduino Uno kit Currently, the device changes mode with a press of the mode button which will later be incorporated in a suitable rotary encoder. I modified the prototype’s rotary encoder to remove the […]
3D POV display
Gelstronic shared detailed instructions of how to build this 3D POV display, project instructables here: In my project i use a spinning helix of LED strips. There are a total of 144 LEDs that can displays 17280 voxels with 16 colors. The voxels are arranged circularly in 12 levels. The LEDs are controlled by only […]
Dynamic lights with CMOS integrated
Nicu Florica @ Arduinotehniq writes: Inspired by a 1990 article from Tehnium anual magazine, I revisited an old schematic of mine designed for dynamic “games” without the need for microcontrollers. A few years back, I was in search of a straightforward solution for an automatic game system, and this schematic came to mind. I refined […]
Build your very own drink mixing robot
Yu Jiang Tham designed and built his own bartender robot named Bar Mixvah, that is available on Github: I built a robot that mixes drinks named Bar Mixvah. It utilizes an Arduino microcontroller switching a series of pumps via transistors on the physical layer, and the MEAN stack (MongoDB, Express.js, Angular.js, Node.js) and jQuery for the […]
DIY polarity Led tweezers
Jesus Echavarria shared detailed instructions of how to make a simple tweezers for checking led polarity: I usually assemble by hand all the boards I make. I use SMD components, especially in 0805 format for resistors, capacitors and leds. With the last ones, I always have the same problem: I need to check the polarity of […]
The microTS – Smallest synth in the world
MicroTS, a smallest synth in the world from DIY synthesizer: The micro-TS is a key fob sized DIY synthesizer (61x41mm) with actually useable knobs like an analog synthesizer. The ball pen is for size reference. It has a one octave touch keyboard, 6 knobs and a stereo headphone output. Running on a CR2032 button cell battery […]
Precision pressure meter with the Bus Pirate
Scott Harden has a nice build log on his precision pressure meter project: I just completed building a device capable of measuring temperature to one hundredth of a degree Celsius and pressure to one ten-thousandth of a PSI! This project is centered around an ICstation MS5611 temperature sensor breakout board which was small enough to […]
Beacon Keyer
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 was in 2013. A beacon […]
DIY thermal vision shoots 360 panoramas
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 complete timings are being analyzed […]
MPPT solar charger rev c
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 too different in terms of […]
Homebrew PiHPSDR
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 hardware shopping list includes. RaspberryPi […]
5V Regulator Cap for 9V battery
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 why not add a convenient […]
A Solid State QRP Rig from 1955!
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 I could not let that […]
Temperature controlled etching bath with magnetic stirrer
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.
DIY laser scanning microscope
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. And those bits are very […]
A Line-us clone
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 off a USB cord. I […]
HC 508 update
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.
DIY Heng Lamp
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 switch to turn it on […]