DIY Chronodot, homemade RTC with a battery backup

Valentin built a DIY version of the Chronodot real-time clock with battery backup. He used some disc shaped perfboard to assemble all the components. There is an optional component that you can add – a real time clock (RTC) with battery back up. It is called Chronodot RTC. All it does is ensure that clock […]

DIY geomagnetic storm monitoring

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 […]

Roundup of tips and tricks for breadboards

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 […]

High-voltage arcs using a flyback transformer from a monitor

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 […]

Digital light intensity meter with a calibrated LDR

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 […]

Electrochemically plated vias for homemade PCBs

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 […]

DIY double sided PCB with soldermask

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 is organizing an SMD soldering workshop

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 […]

Nomis: Simon game clone on ATTiny85

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 […]

DIY ATmega programing adapter using a IC testing clip

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 […]

DIY Santa Claus Singer with Flyport

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 […]