EEssential

The ARM (Advanced RISC Machine) architecture appears in many 32-bit microcontrollers. I have NXP (Philips) LPC2138 (ARM7TMDI-S) and Luminary...

Solid state relays that carry large current are bulky.  A simply way to have a small optocoupler driving a power MOSFET.

DRC Make sure the rules are complete Resolve all DRC errors Footprint verification Check for footprint orientation, pin assignment, espe...

A miniature servo motor may require a voltage of 5V or less and current of 200mA.  An audio amplifier is ideally suitable to drive this type...

I needed a capacitor that can withstand over 400V. But what I had were 250V capacitors. So I put two identical capacitors in series. I mo...

This list also appears here . 1. Troubleshooting Analog Circuits (EDN Series for Design Engineers) by Robert A. Pease...

In the course of one's life, there are a few moments of enlightenment that significantly alter one's conception. Here are the some ...