Robust systems often allow multiple power sources. When different power sources are used to power a device, switches need to be implemented to separate the power supplies from each other to avoid damage...

The isolated AC-to-DC flyback converter is the most commonly used power supply type for home and industrial devices. Fear of the main voltage and complexity of calculations cause electronic beginners and enthusiasts to procrastinate DIY such circuits...

I added two 50-ohm outputs to the schematic of my published voltage-to-frequency converter. Then, I designed a PCB, purchased the (mostly) surface-mount components...

A homing sensor is a device used in certain machines to detect a fixed reference point, allowing the machine to determine its exact starting position...

Generating ozone and negative ions in the air can be done by a corona discharge. For this we can use a sharp tip of negative polarity, acting against a flat metal part of positive or neutral potential...

It’s just a fact of life. A BJT wired in common emitter, even after compensating for the effects of device and temperature variations, still isn’t a perfect current source...

Without a doubt, FM transmitter and receiver are among the top favorite electronic project topics, however, building a digital FM transmitter can be a challenging project for electronics enthusiasts...

Recently, we’ve seen Design Ideas for programmable current sources with improved accuracy using the LM3x7 series of three-legged regulators...

The project presented here is a professional quality phantom powered microphone pre-amplifier...

There’s been interest recently here in the land of Design Ideas in a family of simple interface circuits for pulse width modulation control of generic voltage regulators...