The classical Schmitt trigger circuit that you'll find in textbooks provides some noise immunity, such as for the front end of magnetic pickup in position-sensor circuits...

We recently saw how certain audio power amplifiers can be used as oscillators. This Design Idea shows how those same parts can be used for simple amplitude modulation, which is trickier than it might seem...

A typical LED-driver circuit uses a transistor to provide current and a series resistor to decrease the voltage you apply to the LED. Unfortunately, the energy (VSOURCE – VDIODE) × IDIODE in a transistor/resistor combination goes to waste...

Precision-matched resistors, diode pairs, and bridges are generic items. But sometimes an extra critical application with extra tight tolerances (or an extra tight budget) can dictate a little (or a lot) of DIY...

Stephen Woodward, a prolific circuit designer with way more than 100 published Design Ideas, had his “80 MHz VFC with prescaler and preaccumulator” published on October 17, 2024...

Holtek is delighted to announce the release of its new generation of low dropout voltage linear regulators with low quiescent current, the HT75Rxx-1 and HT75Rxx-7 series...

We’ve seen lots of interesting conversations and Design Idea collaboration devising circuits for power switching using inexpensive momentary-contact SPST pushbuttons...

Nexperia introduced the industry’s first ESD diodes designed to protect 48 V automotive data communications networks against the destructive effects of electrostatic discharge events...

In many applications, it is not possible to measure distance to the target by establishing a physical contact. Typical examples include measuring presence of objects on a conveyor belt in logistic centers, or ensuring safety distances around moving robot arms...

Implementing a simple digital-to-analog converter by cascading a single pulse width modulator and an analog low-pass filter is nothing new. Nor is applying to a filter the sum of the outputs...