electrobob.com has build a device that alerts you if sitting to long: Sitting for long periods has become more common in today’s jobs causing serious health issues. Unfortunately the plethora of activity trackers fail to address the issue: being rather active while sitting does not...

SIGLENT’s SDM3055 series is a dual display digital desktop multimeter. The SDM3055 provides a rich and powerful feature set at an excellent price. This DMM family is well suited for production testing, R&D and certification work, as well as any place ｗｈｅｒｅ an accurate...

In this episode Shahriar takes a close look at one of Keysight (Agilent) InfiniMax III active probes. The model N2802A offers 25GHz of analog bandwidth, 17.5pS of rise time and a total differential input capacitance of 32fF at 10k-Ohm input impedance. The front-end amplifier of this...

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...