Two op amps provide averaged absolute
Two op amps provide averaged absolute value
09.23.2021 Circuits

The circuit is useful when you need amplitude demodulation or an averaged absolute-value conversion. The circuit comprises two stages, the first of which is a differential-output absolute-value converter...

Hot-swap structure offers improved redundancy
Hot-swap structure offers improved redundancy
09.23.2021 Articles

For redundancy purposes, a number of power supplies, using ORing diodes, can work into the same load. During maintenance, when you can remove any power supply, the minimum possible power perturbation at the load is desirable...

Renesas Expands Medical Industrial Environmental Sensing
Renesas Expands Medical and Industrial Environmental Sensing Portfolio with New Thermopile-Based Detectors for CO2 Sensors
09.23.2021 News

Renesas Electronics expanded its industry-leading environmental sensor portfolio with its first family of thermopile-based detectors with integrated optical filters for optical (NDIR) CO2 sensors...

USB Phone Charge Guard
USB Phone Charge Guard
09.22.2021 Circuits

The ATtiny45/85 USB Phone Charge Guard controls and monitors the charging of phones and other devices. Voltage, current, power and energy are constantly measured...

Position detectors provide motor-control logic
Position detectors provide motor-control logic
09.21.2021 Circuits

In the circuit assume that a brush-type dc motor must drive a load back and forth between two endpoints on a lead screw. Optical sensors determine end of travel, and an SPDT switch selects to which end to send the load...

Measure inductance capacitance over wide range
Measure inductance & capacitance over a wide range
09.20.2021 Circuits

Most simple circuits you'll find for measuring reactive components cover only a limited range of component values. Here's a circuit built from a handful of inexpensive parts that will let you measure values of both capacitors and inductors over seven orders of magnitude...

Transistor tester fits into your pocket
Transistor tester fits into your pocket
09.16.2021 Circuits

It can be helpful to rapidly and easily determine the polarity (npn or pnp) and function of a transistor. The pocket-transistor tester is ideal for quickly testing without regard to such parameters as gain and frequency response...

Divider generates accurate 455kHz square-wave signal
Divider generates accurate 455kHz square-wave signal
09.16.2021 Circuits

The circuit here is an oscillator with an unusual frequency divider that I designed when I was developing an RF system. I needed a stable and accurate 455 kHz digital signal generator that used as few components as possible...

Electronic battery connection method boosts efficiency
Electronic battery connection method boosts efficiency by up to 30%
09.15.2021 Articles

Switching Battery Inc., has unveiled an innovative electronic method for the connection of batteries called "para-series". The patent-pending para-series method is based on dynamically switching a group of batteries...

Infrared Thermometer Pen
Infrared Thermometer Pen
09.13.2021 Circuits

Also called the ThermoPen, the goal of this project was to create a portable thermometer usable for precise uses case...