EEssential

The notebook computers nowadays tend to have only one audio jack, a headphone and microphone combo.  It has four connections and requires a ...

The basic solid state amplification devices are bipolar, JFET and MOSFET transistors.  All of them can be considered as transconductance ...

When charging my tablet using a bench supply, I notice that it only draws 0.45A, staying within the 0.5A limit.  But the tablet is capable o...

One of my computers had a CMOS checksum error and waited for me to press a key to proceed.  I usually talked to this computer running Linux ...

I recently had to develop code for the AT91SAM7 microcontroller.  AT91SAM7 has an ARM7TDMI processor core, an architecture that has been sup...

To power portable IoT modules, we need to regulate battery voltage to a stable voltage, usually 3.3V.   A LiPo pack is attractive: it can be...

A RC toy jeep is gutted and transplanted with a new controller, a Bluetooth communication module and new sensors. Toy RC Jeep Newbrigh...