21st Jun 2011

How to: Adding an image to an Eagle layout.

When your using Eagle to design and layout circuits, at some point you may want to add an image. While Eagle easily supports adding text, we are going to use...

19th Jun 2011

What can castellations do for you?

Castellations are a low cost connection method that turns the PCB into a surface mount sub-assembly. They are commonly used on small radio assemblies and as breakout boards for fine...

22nd Nov 2010

Solder Hotplate

To perform low temperature soldering of laser diodes a hotplate is being designed and built. It consists of two parts, the heater and the controller. The heat source is four...

30th Aug 2010

LED Flashlight with 1w Constant Current Drive

A constant current LED driver was implemented to power a 1 Watt Cree P4 XR-E providing roughly 85 Lumens @ 350 mA. The constant current SMPS was based on the...

25th Aug 2010

9 Watt LED Desk Lamp

A desk Lamp was realized with a 9w LED module, a salvaged Pentium slot heatsink and an AtMega 8. Two switch mode supplies were used, one to provide 5v for...

19th Aug 2010

WindPOV Weather Station

A wind turbine powered weather station displaying temperature, humidity and wind speed by persistence of vision using 8 white LEDs along a wing tip. The turbine blades were cut from...

20th May 2010

Capacitive Water Sensor

A capacitive sensor was developed as a feedback method to measure the moisture content of a system. It was based on an AtTiny2313 running on the internal RC oscillator  @...

31st May 2009

DC Servo Drive

¬†¬† This is a DC Servo drive built in the summer of 2009 for the project “Topology of Dubai” which can be found online at SocialHardware.net. An Atmega88 @ 16...