Measuring Stability In A Logic-Gate-Based Oscillator
05.21.2018 · Articles
Designers seeking a quick and easy frequency source often use a relaxation oscillator based on digital gates such as the 74HC14 inverter with hysteresis. The oscillator is also useful in sensor signal digitization when using resistive or capacitive sensors instead of fixed components in the circuit...
Power for the Professional: What's New in Autodesk EAGLE 9.0
05.15.2018 · Articles
Sam Sattel, Autodesk Ladies and gentlemen, the next major update for Autodesk EAGLE has landed! This release is all about upgrading the professional tool that you know...
Beyond the Op Amp - Designing With IC Comparators
05.11.2018 · Articles
A comparator is a great circuit because it provides a near ideal transition between the analog and digital domains. The comparator looks at two linear input signals and gives a digital output that’s either high or low depending on whether one input is above or below the other. Simple, but widely useful...
Use Current to Drive Solenoid, Relay from Array of Voltages
04.17.2018 · Articles
Rather than use a fixed-rail voltage source, it’s more efficient and flexible to utilize a current source so that performance remains consistent while supply rail and coil resistance change...
Circuit Ensures Smooth "Soft Start" for Isolated Converter, Limits In-Rush Current
04.04.2018 · Articles
Most dc-dc converters require a soft-start circuit to limit the in-rush current at startup. Although a smooth soft start is required for systems with power-on reset, this is difficult to implement in an isolated converter with a controller on the primary side and a limited duty cycle or current...
Celebrating the 70th Anniversary of the Transistor
04.03.2018 · Articles
As of Dec. 23, 2017, the transistor was officially 70 years old. The invention of the transistor may have been the greatest technology development of the 20th century. It has given us the integrated circuit and its progeny computers, TVs, smartphones, and all the other electronic stuff we use every day...
The Charge-Pump Option to LDO and Inductor-Based Regulators
03.30.2018 · Articles
Charge pumps are ideal for designs using a larger, main single-voltage power supply that requires lower-current auxiliary voltage sources, and can handle ICs and components that demand multiple voltages. A charge pump is a type of switch-mode power-supply circuit that’s used as a dc-dc converter or regulator with appropriate feedback control...
LEDs 'making light pollution worse'
03.06.2018 · Articles
The transition from sodium to LED exterior lighting over recent years appears to have made global light pollution worse not better, scientists have reported. A team of researchers who studied NASA images say that in the last four years the illuminated area of the earth grew by 2 per cent...
Teardown: Smart switch provides Bluetooth power control
02.28.2018 · Articles
I've tested (and tore down) several network-controllable power switches of late; Belkin's WeMo and, more recently, TP-Link's HS100, both Wi-Fi based. Then there's GE's Avi-on line. Unlike the others I just mentioned, it's Bluetooth-based, and with a twist...