With the recent increase in solar storm activity, Alexander Avtanski bring our attention to his DIY magnetometer project. The activity of the Sun varies on a cycle with a period of approximately 11 years. Periods of low solar activity are followed by a few years of sharply increased number of solar spots, flares, and coronal […]
Breadboards are a really helpful tool for quick prototyping. Boseji made a roundup of breadboard tips and tricks available online. His article includes useful tips like how to breadboard a power supply, and even how to build one yourself. We have all used breadboards, or those who plan to jump into the fascinating world of […]
Hak8or uploaded a gallery of high voltage arc pictures. The setup was salvaged from an old CRT monitor. He suspects the flyback transformer produces around 30 kV. I found some old pictures of me playing around with a flyback, and I wanted to test out this awesome gallery thing I found, so I mushed them […]
Shawon made a light intensity meter using an ATmega microcontroller to read a light-dependent-resistor and display the values on a 2X16 character display. To calibrate his LDR he used a digital light meter and a dimmable light source. This allowed him to plot the sensor output and properly calibrate his device. This project is about […]
By electrochemically plating vias, Bearmos takes home-etched PCBs to the next level. His constant current source, with we covered earlier, is used in the process. I just finished writing up some of the details on DIY plated through holes. This is what the simple constant current source was designed for. This process was slightly adapted […]
Retromaster has honed his PCB making skills to get professional quality boards at home. He’s successfully made double sided PCBs with 8 mil trace width, with 6 mil clearance. In his guide he describes how to etch the PCB with toner transfer, how to use mechanical vias, and hot to apply soldermask paint.
DorkbotPDX, a hackerspace in Portland, is organizing an SMD soldering workshop on the 29th of January. No tools or prior experience is necessary. For $8 you’ll get a kit to assemble in their shop. Learn how to work with surface mount technologies. This workshop is suitable for newcomers to SMT as well as more experienced […]
Christopher Woodall from HappyRobotLabs wrote in about his recent project, Nomis, a Simon clone made using an ATTiny85. It uses up 4 pins, 3 for LEDs and 1 for buttons (ADC input). The write up can be found here. Everything is completely open source (except for the EAGLE CAD limitations of course, which kind of […]
If you ever wondered how those phone bugs from spy movies work, here is the schematic for your very own. This simple FM transmitter uses a phone line to both power the device and receive the audio signal. Just hook it up to the phone line you want to monitor and tune your FM radio […]
Terry built a LED bar display clock using only logic ICs: Although I’m way too late for the 7400 contest, I had built a chips-only digital clock from 4000-series IC’s The time was displayed by columns of LEDs i.e. first columnt was 1-12, and the led for that hour would be lit. The next column […]
EEVblog has a video about DIY multimeters. A few months ago the EEVblog forum talked about designing their own multimeter, so Dave made a video about his ideas on the subject. We’ve also toyed with the idea of an open source digital multimeter, but ready-made devices are so cheap and ubiquitous it hasn’t become a […]
H used an IC testing clip to make a simple adapter for programing ATmega microcontrollers on the fly. IC test clips are tools used to grip ICs and provide easy connection to the pins. I’ve got a different use for it though. If you develop a circuit using an Atmega chip (like, say, a circuit […]
This Nixie tube tester has an 11 position switch to change the displayed digits. A simple device for testing and/or healing Nixie tubes of IN-18 type. An 11-pole switch is connected in series with a 50 KΩ pot (+ 470 Ω resistor for safety), powering from an 180V DC source. Normal operation at 2 mA […]
Drew picked up our old blinking Xmas card project. He got the PCBs just in time to complete the project before Xmas. I finally assembled a couple and am off to give them to my parents and grandparents at Christmas Eve We’re glad our project brought some joy during the festivities. This project is no […]
Jobytaffey is designing an Ethernet to radio bridge. This prototype uses an ENC28J60 for ethernet, and an XRF radio module. The XRF module is a UART-controlled 863.8 MHz transceiver with 250 Kbps transfer rates. Via Flickr.
Stefano has completed work on a holiday project known as the DIY Santa Claus Singer with Flyport. It is built around an animated Santa Claus decoration with the control switch bypassed with an NPN transistor. The switch is controlled over the internet via the Arduino/ethernet shield combo which responds to Twitter messages. Part one of […]
Schazamp made some pinout stickers for the PICqueno32 DIP project. The silkscreen pinouts on the bottom of the PCB become obscured when mounted on a breadboard. So Schazamp decided to make pin legend that he could stick to the top, and side of the board. Grab the document to print your own stickers from the […]
Garrett and his friend were annoyed by the classic amber lighting of the gauge cluster on his friend’s Chevy. They decided to replace the light bulbs with white LEDs. He was nice enough to write up a full tutorial of their endeavor with lots and lots of pictures. Via the forum.
Phil made a DIY breakout board for the PIC16F883 microcontroller. The board uses a surface-mount single-layer design, and the parts are nicely spaced. It’s an easy board to make at home using the DIY toner-transfer method of PCB etching. You can download the source files and other design data from his site. Via Jumperone.
Juha Kuusama writes to inform us of LiveLight, a cool DIY ambilight project. This is a homebrew ambilight system by SunWind that has 9 PWM controlled RGB channels which drive RGB LED strips that are mounted in the back of a 40″ Sony Bravia. All the parameters can be reprogrammed to match your taste. The […]