by Einar Abell @ edn.com: This Design Idea gives two versions of an indicator light that changes from green to red as a battery discharges. There are many circuits that do this sort of thing, but all the ones I have seen are too complex and costly for my taste. This DI shows a method...

The LTC®3335 is a high efficiency, low quiescent current (680nA) buck-boost DC/DC converter with an integrated precision coulomb counter which monitors accumulated battery discharge in long life battery powered applications. The buck-boost can operate down to 1.8V on its input and...

by Jan Buiting @ elektormagazine.com: Even in the Internet & Wi-Fi age where it seems irrelevant just where you are at a specific time, it’s sometime useful to know if a visitor called at your door while you were out. Who knows, it might be the DHL man with a delivery of...

Sasa Karanovic has designed and built a DIY USB power Supply active load tester, that is available at GitHub: USB Power supply Active Load Tester or short PAL Tester is unit designed for testing the quality of the power supplies. Idea was to create low-cost, precise device for...

The electronics trend in automotive is continuously rising due to the demand in the market. The technological developments are now into embedded system in which the manufacturers are developing products that suits to the needs of the people. In this design, it features a automotive...

If you´re searching for an enclosure with a high variability and for a reasonable price, then we can recommend you the EH basic series enclosures. Searching for a compromise between the quality (materials, design,…) and production costs is a theme at development of every device...

by electronics for everyone @ instructables.com: Today I hope to teach you all about ultrasonic sensors and hopefully by the end you'll have a nice little digital tape measure of your own to use as you please. This is my second version of this project so if you can get it as small...

by Graham Prophet @ edn-europe.com: Distributor element14 has a 7-in. Touchscreen Display for the Raspberry Pi, expanding the ecosystem of accessories, to enable users to create all-in-one integrated projects such as turning their Pi into a tablet, infotainment system or embedded...