In this post I have explained regarding what’s ripple current in power supply circuits, what causes it and how it can be reduced or eliminated using smoothing capacitor. What’s Ripple in Power Supply Circuits In all AC to DC power supplies the DC output is acquired by rectifying the AC input power and filtering through […]
Current
Modifying XL4015 Buck Converter with an Adjustable Current Limiter
In this post I have explained a simple way to enhance the the XL4015 DC to DC buck converter with an adjustable current limiter, which seems to be missing in the original module. About XL4015 The XL4015 is a 180 KHz fixed frequency PWM buck (step-down) DC/DC converter, specially designed for operating a 5 V, […]
Battery Current Indicator Circuit – Current Triggered Charging Cut off
In this post I have explained about a simple battery current sensor with indicator circuit which detects the amount of current consumed by the battery while charging. The presented designs also have an auto cut off when the battery stops consuming current at its full charge level.. Why Current Drops as Battery gets Charged We […]
Understanding MOSFET Current Rating in Datasheets
In this post I will comprehensively explain the current rating of MOSFETs in their datasheets, and helps us to understand how it is calculated by the design engineers, keeping in mind the various external parameters, which potentially impact the current limitations of the device. In simple terms, MOSFET current rating can be defined as the […]
Simple Voltage-to-Current and Current-to-Voltage Techniques – By James H. Reinholm
There are many types of voltage-to-current and current-to-voltage converter circuits, and most of them use a combination of opamps and transistors to achieve a high level of accuracy. But when high accuracy isn’t necessary, a simple converter of this type can be made using just one or two resistors. Resistor as Voltage to Current Converter […]
AC Ammeter Circuit for Measuring Current across 220 V Appliances
In this article I have explained how to build a simple AC ammeter circuit which can be used for checking the current consumption of household 220 V or 120 V appliances. The main reason for high monthly utility bills is the use of large electrical equipment like refrigerators, washers and dryers, dishwashers, etc. These appliances […]