Here are more PWM ripple-cancellation design ideas.
Here's a proposed design for a universal passive logic element of positive and negative logic, made on just one transistor.
Different ways to use the CD4013B dual-D CMOS flip-flop for purposes that it was not originally intended for.
The low-cost resin printer has been refined to the point of being a must-have in a lab.
Fan drivers with power-loss braking capability are presented as options that provide the desired improved safety and thermal efficiency while simplifying fan design and logistics in modern server applications.
This Design Idea creates an adjustable triangular and sawtooth waveforms using a 555 timer.
Here's a Design Idea for a winding-resistance-cancelling motor drive with a pot or with a DAC.
This Design Idea presents a 555 multivibrator circuit that relies on an inductor instead of the usual capacitor to set the timing characteristics of the timer circuit.
This self-heated constant-temperature-delta transistor anemometer is cheap, rugged, and sensitive.
Analog and digital comparators allow you to compare input signals by their level.