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.
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…
Solar fan with dynamic battery backup for constant speed of operation
This design idea features a fan that runs at constant speed.
Simple amplifier design with phantom power
This versatile circuit is suited for connecting to an inductive source or long connecting cable.
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.
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.
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.
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…
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…
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.