Month: July 2015

by Valentin Kulikov @ edn.com This article describes simple constant current driver module with fast PWM input that can be used for driving medium and high power LEDs. The module uses an integrated constant-current output, DC-DC buck converter with output current configurable from...

A programmable 8-character LCD module and digital voltmeter project from Tuxgraphics: Our 3 digit LED digital voltmeter module has been quite successful over the years. This new LCD module is basically an advanced version with a lot more capabilities. You can power it with the same...

by Sagar Savant @ edn.com: Choosing components is a series of time-consuming tasks, from surveying the market for possible candidates to properly evaluating performance. As a hardware engineer who has worked in Silicon Valley for 10 years, I have spent significant time developing...

If you need to simulate overvoltage, slow start, fluctuations and other situations, which may occur in real life, then the TDK Lambda power supplies won´t disappoint you. Imagine a laboratory (testing) power supply able to provide a virtually any function. Switching on, drop-out,...

by Aleator777: What's that smell? It's noxious gas of course! If you're in an environment where there's a possibility of gaseous release of which you'd rather not breathe, why not build an automatic system for sensing and alerting you? The design for the Environmental Alert System is...

Here’s how to automagically open doors at home or at work with a tap on your wrist. By Marc Jensen, James Squires and Shawn Roske: What’s an Apple Watch good for? How about unlocking doors with just a tap on an app? We figured out how do something no one else has done for under...

by Pete Mills : If you've poked around the internets where electronics hobbyists collect, it is likely that you are acutely aware of our incontrovertible affinity for building timekeeping clocks. It is similarly unlikely that you have been able to evade the plenitude of nixie tube...

by Joel Bodenmann: The DE1-SoC board is populated with a six digit 7-segment display. All digits are connected to the FPGA. Therefore, in order to control the 7-segment display out of the Linux userspace code, one has to create a new component in QSys that is connected to the...