Year: 2015

Always an exciting day when a new piece of equipment arrives at the lab! The basic features of the lab's new Tektronix TSG4106A RF Signal Generator are reviewed, including a peek at some of the auxiliary signals available on the rear panel. TSG4106A RF signal generator unboxing and...

Spiros Papadimitriou has build a WiFi light controller and clock based on ESP8266: A couple of months ago I picked up cheap WiFi-controlled LED bulbs (one among dozens of very similar devices), after seeing them at a friend’s place. This turned out to be an excuse to play with the...

Resistor Scanner is an Android app that uses OpenCV to scan resistor colour bands and determines their values.Uses OpenCV to scan resistor colour bands and determines resistor values. Source available here: https://github.com/thegouger/ResistorScanner/ Resistor Scanner Android...

whiskeytangohotel.com has build a internet monitoring device based on Raspberry Pi: It is a pretty commonly uttered question (sometimes loudly) around the home or office; "Is the internet up?" As the goto IT Support Manager around the house this can get a little tiresome. Most of the...

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...