DC Motor Speed and direction controller project based on L293D H-Bridge and 555 Timer IC. 555 Generate PWM and L293D works as output driver. The 293D provides bidirectional drive current up to 600mA a voltage from 5V to 12V. L293D includes the output clamping diodes for...

by Harry Baggen @ elektormagazine.com: Magnetic random-access memory (MRAM) is faster, more efficient and more robust than other data storage media. MRAM stores data by making clever use of electron spin – a sort of gyroscopic property of electrons. Because it used magnetism...

LTM8064 is a step-down DC/DC µModule (micro-module/power module) regulator with a 6V to 58V (60Vmax) input voltage range and adjustable load current control with ±10% accuracy at 7A. Linear Technology introduces the LTM8064, a step-down DC/DC µModule® (power module) regulator...

In this episode Shahriar repairs an Anritsu 37347A 20GHz Two-Port Network Analyzer. The unit does not boot up and as a result its internal state is unknown. The boot fault is traced to a bad RTC module which has a built-in integrated battery. A replacement unit is located which allows...

Dexter Johnson has a writeup about flexible, water-loving logic circuits and sensors without the need of semiconductors. They constructed the chemoelectronic devices by coating gold nanoparticles with any of four types of organic molecules called ligands. Each ligand produces a...

Jeff Ciesielski has published a component manager for KiCad layout software. The goal of this app is to ease the bom management burden on designers who choose to use Kicad for their layout and schematic capture needs, allowing for faster, easier data entry, and to provide a part...

Ethan Zonca has designed a programming adapter for use with STM32 programmer. After making the switch from AVR to STM32 microcontrollers, I redesigned my old 6-pin ICSP pogo-programming adapter for SWD. The new design allows programming with pogo pins or a small pin header soldered...

Here is a nice idea of a business card solar smartphone charger with USB plug. The charger is 3mm thick and can provide 50mA @ 5V Smartphone Solar charger card -...