Magnetic Fields Produced By Electrical Currents
https://www.electronics-lab.com/article/magnetic-fields-produced-by-electrical-currents/
Magnetic Effect Of Electric Current Magnetostatics is the study of magnetic fields in systems where the electric currents are steady (not changing with time). It’s essentially the magnetic equivalent of electrostatics. Steady currents produce static magnetic fields that are constant (both in magnitude and direction) in time. When a steady current flows in a wire, […]
Electric Conductivity, Resistance and Ohm’s Law
https://www.electronics-lab.com/article/electric-conductivity-resistance-and-ohms-law/
Introduction Consider a piece conductor in the shape of a cylinder with a voltage applied across its ends, as depicted in Figure 1. When a potential difference (voltage ∆V) is applied between two points in a conductor, an electric field E is created, and free electrons (e–) in the conductor feel a force due to the electric […]
Steady Current And Current Density
https://www.electronics-lab.com/article/steady-current-and-current-density/
Introduction Many practical applications and devices are based on the principles of static electricity. However, electricity was destined to become an inseparable part of our daily lives when scientists learned how to produce a continuous flow of charge for relatively long periods using batteries. The battery, or voltaic cell, was invented in 1800 by Italian […]
Monitor voltage and current with the Tiny V/A Meter
https://www.electronics-lab.com/monitor-voltage-current-tiny-v-meter/
Measuring voltage and current is an important part of the development process for any hardware product. Especially when developing a low power device, the knowledge of how much power the device is drawing at each mode of its operation is critical to the correct estimation of its battery life. While voltage can be measured in […]
DIY voltage and current reference
https://www.electronics-lab.com/diy-voltage-current-reference/
Petteri Aimonen designed and built his own voltage and current reference: When developing a data acquisition system, I ran into a need of having fairly accurate current reference to compare against, 0.1% accuracy or better. This is not a particularly high standard, but unable to find a suitable device in my price range, I chose […]
Self-Calibrating USB Voltage/Current Meter
https://www.electronics-lab.com/self-calibrating-usb-voltage-current-meter/
With a code size of 1KB on an ATtiny13A MCU, this tiny module measures voltages up to 22 volts and current up to 5 amps. This project is published by Tirdad Sadri Nejad. He writes: There are a lot of so-called “USB doctor” modules which are used for monitoring currents flowing through a USB connection. […]
Pokit PRO – a multichannel multimeter, oscilloscope and logger
https://www.electronics-lab.com/pokit-pro-multichannel-multimeter-oscilloscope-logger/
Pokit Innovations has done it again. Hot on the heels of pokitMeter’s success on Kickstarter and beyond, the pokit team are ready to ramp it up with their next product – Pokit PRO. This new electronic measurement tool will be launched as the company’s second Kickstarter campaign on the 22nd of October 2019. Pokit PRO […]
Nano Current Meter using ATtiny84
https://www.electronics-lab.com/nano-current-meter-using-attiny84/
David Johnson-Davies published another great tiny project. He writes: This project describes a simple low-current meter I devised to check the sleep current of different microcontroller circuits, such as ones based on AVR microcontrollers. It’s capable of measuring currents of between 10µA and 30nA with reasonable accuracy, using an ATtiny84 and a few other low-cost […]
Joulescope: Precision DC Energy Analyzer
https://www.electronics-lab.com/joulescope-precision-dc-energy-analyzer/
Joulescope™ enables designers, engineers, and makers to quickly and easily optimize the energy consumption and battery life of a target device. Joulescope is designed to automatically handle wide current ranges and rapid changes in energy consumption, while allowing the target device to run normally. Jetperch LLC writes: Measuring energy consumption during product development is crucial, […]
Tektronix Launches Two New 6½-digit DMM and DAQ systems : DMM6500 And DAQ6510
https://www.electronics-lab.com/tektronix-launches-two-new-6%c2%bd-digit-dmm-daq-systems-dmm6500-daq6510/
Tektronix, a US-based company, has introduced two new Keithley 6½-digit models to its line of Digital Multimeters (DMMs) and data-acquisition systems: The new DMM6500 DMM and also the new DAQ6510 data-acquisition system. The company has also upgraded their Kickstart measurement software to version 2.0. Keithley has long been a dominant provider in the 6½-digit DMM market. With the DMM6500 and DAQ6510, the company looks forward […]