2023-02-24 - Stephen Woodward

Cancel PWM DAC ripple with analog subtraction but no inverter

Using an inverter-free solution to attenuate the PWM DAC output ripple and achieve nearly the same ripple performance and nearly-as-fast…

2023-02-08 - Michael A. Shustov

Universal purpose optoelectronic logic elements

This design idea looks at the possibility of creating passive and active optoelectronic logic elements simultaneously performing the functions AND,…

2023-01-20 - Steve Hageman

My favorite design idea of all time…

A look at some clever design ideas that might stick with you through the decades.

2023-01-04 - Stephen Woodward

Transistor ∆VBE-based oscillator measures absolute temperature

Building on a handy Jim Williams' application note exploiting the predictable BJT VBE change with variable current for temperature measurements.

2022-12-19 - Bill Schweber

How many ways can you ramp an LED?

The "thought question" of how to slowly cycle an LED's intensity up and down leads to some interesting design ideas.

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.