2022-11-18 - Daniel Dufresne

Active shunt voltage limiter outshines Zener

Circuit to limit voltage to a maximum of 1.5 V across dissipation limited devices with symmetrical limiting and a 2…

2022-11-10 - Stephen Woodward

Cancel PWM DAC ripple and power supply noise

Here are more PWM ripple-cancellation design ideas.

2022-11-07 - Michael A. Shustov

Universal logic element on one transistor and its applications

Here's a proposed design for a universal passive logic element of positive and negative logic, made on just one transistor.

2022-10-28 - Stephen Woodward

CMOS flip-flop used “off label” implements precision capacitance sensor

Different ways to use the CD4013B dual-D CMOS flip-flop for purposes that it was not originally intended for.

2022-10-19 - Damian Bonicatto and Phoenix Bonicatto

Time for a second 3D printer in the lab

The low-cost resin printer has been refined to the point of being a must-have in a lab.

2022-10-14 - Chengyi Jin

Integrated power loss brake features lower energy consumption and reduce costs in data-center fan applications

Fan drivers with power-loss braking capability are presented as options that provide the desired improved safety and thermal efficiency while…

2022-10-13 - Alfredo Gonzalez Calvin

Adjustable triangle/sawtooth wave generator using 555 timer

This Design Idea creates an adjustable triangular and sawtooth waveforms using a 555 timer.

2022-10-07 - Stephen Woodward

Precision DC motor speed control via pot or DAC

Here's a Design Idea for a winding-resistance-cancelling motor drive with a pot or with a DAC.

2022-09-30 - Arthur Edang

Inductor-based astable 555 timer circuit

This Design Idea presents a 555 multivibrator circuit that relies on an inductor instead of the usual capacitor to set…

2022-09-21 - Stephen Woodward

Linearized portable anemometer with thermostated Darlington pair

This self-heated constant-temperature-delta transistor anemometer is cheap, rugged, and sensitive.