A tiny DC to DC buck converter board is useful for many applications, especially if it could deliver currents up to 3 A...

Vishay Intertechnology introduced a new compact, ready-to-use linear position sensor designed for high accuracy performance in demanding environments...

The schematic is rather trivial. A voltage regulator brings down a supply voltage (which might be from a car battery) to 5 V. An additional built-up voltage regulator generates an adjustable voltage of 1.95 V...

A while back I was challenged by a visitor to the website. He needed a very loud sweeping siren type audio sound generator powered by 3 V...

STMicroelectronics announced the Stellar P3E, the first automotive microcontroller with built-in AI acceleration for automotive edge intelligence...

This project is an ultrasonic range finder built using the RP2040 Zero board and a 3.2-inch TFT display. It utilizes the RCWL-1655 sensor, which operates similarly to the popular HC-SR04, to measure distances ranging from 20 cm to 300 cm...

It is well known that a 555 timer in astable mode can be frequency modulated by applying a control voltage to pin 5...

In this Design Idea, the classic Schmitt-trigger-based RC oscillator is “hacked” and analyzed using the simulation software QSPICE...

Toshiba Electronics Europe introduces the TPD7110F, an ideal diode controller designed to enable safe power control and flexible design in automotive systems...

Applications such as audio equalizers require bandpass filters with a constant maximum gain that's independent of the filter's quality factor, Q. However, all of the well-known filter architectures – Sallen-Key, multiple-feedback, state-variable, and Tow-Thomas – suffer from altered maximum gain when Q varies. Equation 1 expresses the second-order bandpass transfer function of a bandpass filter:   (1) where K represents the filter's gain constant. When the input frequency equals ω0, the filter's gain, AMAX, is proportional to the product, KQ. Thus, modifying the quality factor alters the gain and vice versa. Figure 1. This bandpass active filter features adjustable Q and maximum gain in the passband and consists of a twin-T cell with Q adjustment and a differential output stage. You can also extract a frequency-notch output from the voltage-follower stage. This Design Idea describes a filter structure in which K is inversely proportional to Q. Altering Q also modifies K, producing a magnitude-plot set in which the curves maintain the same maximum gain at the central frequency ω0 – that is, KQ remains constant. Figure 1 shows the filter, which comprises a twin T cell with an adjustable quality factor and a differential stage. The differential stage comprises op amp IC3 and resistors R5A through R< ...