Designers often use relays as electrically controlled switches. Unlike transistors, their switch contacts are electrically isolated from the control input. However, the power dissipation in a relay coil may render the device unattractive in battery-powered applications. You can lower this dissipation...
Analog switch lowers relay power consumption
Low-cost relative-humidity transmitter uses single logic IC
The low-cost percentage-relative-humidity radio transmitter operates in a cold-storage warehouse for vegetable storage at temperatures of 1 to 5 °C. It is generally difficult to collect such data from a low-temperature area with high humidity and low illumination...
How Bode plots can help you meet the requirements for dynamic control behavior
This article will describe how Bode plots can be used as a tool to quickly assess if your power supply design will meet the requirements for dynamic control behavior...
Linear supply uses switch-mode regulation
You can use simple circuits to implement small, regulated plug-in power supplies...
DC/DC converter using transistors
Sometimes, you may need to make a DC/DC converter with minor components that can handle small loads. In this article, we are going to make something like that. This DC/DC converter using transistor has only a few components and can handle small loads or higher voltages...
Vertical electrochemical transistor advances biomedical sensing
Researchers at Northwestern University say they have developed a revolutionary transistor that is expected be ideal for lightweight, flexible, high-performance bioelectronics...
Enhanced, three-phase VCO features ground-referenced outputs
Three-phase VCOs see service in many applications, including power inverters and in electronic-music synthesis as control and modulation sources. A previous Design Idea describes a basis for a simple, three-phase VCO. However, adding a few components enhances the circuit's performance...
AM Radio Still Alive and Well
Although the heyday of AM radio has passed, it remains an integral part of many lives as a means of communication in third-world countries, or simply tuning in for local news and weather...
Transistor ∆VBE-based oscillator measures absolute temperature
On June 12, 2011, the analog EE world lost a star when guru James M. Williams died... The design idea presented here derives from one of his circuits ...
Using LEDs as an RGB sensor
The article describes an RGB incident light sensor that uses colored LEDs as narrow-spectrum photosensitive elements...