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…
Cancel PWM DAC ripple and power supply noise
Here are more PWM ripple-cancellation design ideas.
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.
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.
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.
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…
Adjustable triangle/sawtooth wave generator using 555 timer
This Design Idea creates an adjustable triangular and sawtooth waveforms using a 555 timer.
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.
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…
Linearized portable anemometer with thermostated Darlington pair
This self-heated constant-temperature-delta transistor anemometer is cheap, rugged, and sensitive.