The analog DC ammeter with an actual full-scale value of 10 milliamperes in your transmitter that measures 1 ampere of plate current has failed and the only linear meter that fits in the same space ...

Applications such as amplifiers, audio systems and ultrasound require precise phase measurements. This application note shows how to create a simple, low-cost phase meter that provides close to 1% ...

I recently built a simple electromagnetic field (EMF) detector based on a code by Christian Figge that I found on the web. My design includes a 10-LED bar graph (from eBay), which I used to display ...

Researchers have developed a simple, glucose-meter test that can help people monitor their own antibody levels against the SARS-CoV-2 virus, that causes COVID-19. The team from Johns Hopkins ...

TruFlow meters from Nordson Corporation enable monitoring and control of material flow during all phases and line speeds of production for nonwovens, book and product assembly, as well as for ...

This simple circuit measures the strength of a radiated signal from a transmitter. It is commonly used by model airplane builders to check whether their transmitter are really transmitting the radio ...

[Mike] sent in a project he’s been working on lately. This little circuit can measure the capacitance of a capacitor by generating a frequency that’s inversely related to the capacitance. He ...

The DOH-SD1 series dissolved-oxygen meter is said to be easy to operate. It integrates a real-time SD card data logger, setting it apart from comparable meters. The DOH-SD1 series dissolved-oxygen ...