EDN

Use a 555 timer as a switch-mode power supply

Most switch-mode power supplies rely on a PWM (pulse-width-modulated) output that is controlled via voltage feedback. A 555-timer IC can inexpensively perform PWM. The circuit in Figure 1 shows how to ...
Electronic Design

A 555 Timer PWM Circuit to Control Ancient Evil

This article is part of the 2022 April 1st series in the Humor topic within our Series Library. The ubiquitous 1971 digital miracle—the 555 Timer—is important, replete with 25 transistors, 15 ...
EDN

Optical Theremin Using 555 Timer

In this article you will learn how to build an optical theremin using a 555 Timer IC. You will learn the functions of the pins on the 555 chip that are used in this build. You will learn that when the ...
Electronic Design

Single-Cell AA/AAA, 555-Like Analog Timer with Battery-Safe Operation

Semtech Corp. announced a sub-1 V analog timer platform that revolutionizes the conventional 555 timer for low-voltage, battery-operated small appliances. The new SX8122 analog timer offers the ...