2022-06-30 - Majeed Ahmad

Battery-powered smart alarm system design blueprint

The smart alarm system employs AI-based sensor fusion that complements acoustic event-detection processing with a wake detection engine.

2022-06-21 - Stephen Woodward

Low-cost vibration analysis using PC audio and DIY motion sensors

This design idea explores the potential of personal computer audio codecs, software oscilloscopes, and spreadsheet math for acquisition of signals…

2022-06-16 - Vijay Deshpande

Solar fan with dynamic battery backup for constant speed of operation

This design idea features a fan that runs at constant speed.

2022-05-18 - Peter Demchenko

Simple amplifier design with phantom power

This versatile circuit is suited for connecting to an inductive source or long connecting cable.

2022-05-17 - Ben Lough

Isolated power supply design considerations for PMDC motors

When designing an isolated power supply for PMDC motors, several considerations influence the design of the power-converter topologies.

2022-05-16 - Bill Schweber

Active approach to improving performance

Active error correction of system imperfections offers unique advantages, but as with most solutions, it also brings uncertainty and complications.

2022-05-13 - Stephen Woodward

How a 555 oscillator can ignore power supply and temp variations

A variable-duty-cycle/constant-frequency function is achieved without compromising the inherent accuracy of the 555.

2022-04-25 - Pete Millett

Why microstepping in stepper motors isn’t as good as you think

When designing a motion control system using stepper motors, do not assume that the holding torque of motor still applies…

2022-04-22 - Scott Bryson

Magnetic position sensing for precision control in robotics

Here is a primer on how magnetic sensing works for position calculations in robotics applications aided by devices like Hall-effect…

2022-04-20 - Alperen Akküncü

Phased-array PWM DAC

By deploying more PWM channels with appropriate evenly spaced phase delays one can achieve ripple-less output at certain duty cycles.