Low-cost current monitor tracks high dc currents
https://www.electronics-lab.com/low-cost-current-monitor-tracks-high-dc-currents/
Susanne Nell @ edn.com has a design idea on how to measure high dc currents. To measure high levels of direct current for overload detection and protection, designers frequently use either a current-shunt resistor or a toroidal core and Hall-effect magnetic-field sensor. Both methods suffer from drawbacks. For example, measuring 20A with a 10-mΩ resistor […]
Hall-effect current sensing replaces shunt-resistive measurements
https://www.electronics-lab.com/hall-effect-current-sensing-replaces-shunt-resistive-measurements/
These high speed isolated calibrated current sensors are presented as an effective alternative to conventional shunt based solutions; standard-footprint packaged ICs simultaneously offer 100 kHz bandwidth, high accuracy and crosstalk resilience. By Graham Prophet @ edn-europe.com Melexis (Tessenderlo, Belgium) has added the MLX91210 family of integrated sensors; operating from a 5V supply, the ICs have […]
Limiting Inrush Current
https://www.electronics-lab.com/limiting-inrush-current/
aimtec.com has a basic article on how to limit inrush current using passive components. Inrush current or input surge current refers to the maximum, instantaneous input current drawn by an electrical device during its initial turn on. Power converters also feature high inrush currents relative to their steady state currents that may be several times […]
Conventional Flow vs Electron Flow Explained
https://www.electronics-lab.com/conventional-flow-vs-electron-flow-explained/
“baldengineer” explains which way the current flows. A couple of weeks ago I wrote about four current flow direction myths. As a follow up to that popular post, I decided to dedicate this month’s AddOhms electronics tutorial video to Current Flow. In episode #19, I tackle the question of which way does current flow. You […]
Bargraph Current Meter 0-1A Range – PIC16F686
https://www.electronics-lab.com/bargraph-current-meter-0-1a-range-pic16f686/
Tiny Bar-Graph current meter displays a Red color bright, easy to read display of current range from 0 to 1A. This Bar-Graph has 20 segments in single color and display 0 to 1Amp Current. The Barograph current monitor is based on PIC microcontroller with 10 Bit resolution ADC. This high performance measurement provides unique capabilities […]
LED current regulator has low dropout
https://www.electronics-lab.com/led-current-regulator-low-dropout/
Peter Demchenko @ edn.com This Design Idea circuit regulates the current through one or more LEDs, making it almost independent of supply voltage. Its main advantage is a very small dropout voltage, which can be less than 100mV. The design could find use on LED strips, where the voltage can vary along the length due […]
ACS730 – Hall-effect current sensor with 1MHz bandwidth
https://www.electronics-lab.com/acs730-hall-effect-current-sensor-with-1mhz-bandwidth/
Allegro MicroSystems has released its first ever 1MHz bandwidth Hall-effect current sensor IC, boasting a 210ns response time. The ACS730 provides an economical and precise solution for AC or DC current sensing and is aimed at industrial, commercial, and communications systems for motor control, load detection and management, switched-mode power supplies, and over-current fault protection. […]
Low-side I/V sensing IC, with internal power calculation
https://www.electronics-lab.com/low-side-iv-sensing-ic-internal-power-calculation/
Maxim Integrated has posted details of the MAX44299, a low-side current, voltage, and power monitoring circuit that provides an analogue output current proportional to the measured current, voltage, and the internally calculated instantaneous power. The power monitor offers high precision and integration in tiny size. Instantaneous power is calculated internally by multiplying the load current […]
USB Power Meter
https://www.electronics-lab.com/usb-power-meter/
Daniel Grießhaber @ hackaday.io has published his build of a USB power meter. His device is based on ATTiny 85 mcu and 0.96″ OLED Display and is able to measure voltage, current and power output from USB port. Since USB has become more and more a power delivery standard, it would be nice to have a convenient way to […]
Over Current Protection Switch
https://www.electronics-lab.com/current-protection-switch/
Current Sensing Switch is designed to operate a Relay Contact when there is a DC current through the sense resistor exceeds the set point, Set point adjustable from 1A to 3Amp using on board potentiometer. This circuit can offer over current protection to your project. Specifications Input: 12 VDC Range: 1 to 3 A selectable […]