Free Article of the Week! USB Pseudo Battery

In one respect all batteries are identical: sooner or later they die on you! Even rechargeable types are not immune from this problem, as they always need charging again. This makes indoor use inconvenient of devices designed only for portable use, with no provision for connecting an AC adapter. All the same, wherever you find electronic gadgets, a solution is not far away. A pseudo-battery with a USB connection provides permanent power.

With this kit you'll be able to receive frequencies from 500 kHz up to 1.75 GHz, which will allow you to use this device in a number of different situations, such as general radio scanning, air traffic control, public safety radio, weather satellites, radio astronomy, meteor scatter monitoring etc.

The compact Testing Tweezer is specifically designed for quick and easy testing of small electronic components such as switches, LEDs, resistance, fuses or conductivity test on PCB circuits. It can also be connected to a mulitmeter for resistance measurement.

The Air Quality Sensor Kit from Elektor contains all essential parts for analyzing the environment around you and making precise conclusions about different aspects of air, such as temperature, humidity, amount of dust particles etc., in that very environment.

Hey, electronics engineers and makers. Want to publish with Elektor? Contact us.

This kit includes iFixit's widest assortment of bits, complete with every driver head you’ll need to tackle any repair or DIY project.

The Mahi Precision Bit Set contains iFixit’s 1/4"" aluminum screwdriver handle with magnetic bit socket, knurled grip, and swivel top—plus 48 driver bits.

With this iFixit Magnetic Project mat you won't lose any small screws and parts anymore. You'll be able to stay organized and focus on your repair.

Here is a new initiative in the quest for the ultimate human interface in microcontroller designs. Instead of the 2^10th all-in-one solution this time we resort to the modular approach. The result is truly flexible — it can even be used as a (wearable) Christmas decoration or for 3D modelling.

This installment: - The new Raspberry Pi 4 – in three versions - SDR Hands-on Book - Build Your Own Geiger Counter