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Precise Battery Capacity Tester Circuit – Backup Time Tester

Last Updated on October 26, 2022 by Swagatam 8 Comments

battery capacity tester

The precise battery capacity tester circuit explained in the following article can be used for testing the maximum backup capacity of any rechargeable battery in real time. By Timothy John Basic concept The circuit works by practically discharging a fully charged battery under test through constant current, until its voltage reaches the deep discharge value. […]

Filed Under: Battery Charger Circuits Tagged With: Backup, Battery, Capacity, Precise, Tester, Time

Calculating Capacitor Charge/Discharge Time using RC Constant

Last Updated on April 1, 2020 by Swagatam 4 Comments

RC

Capacitor charge and discharge periods is usually calculated through an RC constant called tau, expressed as the product of R and C, where C is the capacitance and R is the resistance parameter that may be in series or parallel with the capacitor C. It may be expressed as shown below: τ = R C […]

Filed Under: Electronics Theory Tagged With: Calculating, Capacitor, Charge, Discharge, RC, Time

Triac Phase Control using PWM Time Proportional

Last Updated on January 2, 2024 by Swagatam 19 Comments

time2Bprop

A triac phase control using a PWM circuit can be useful only if it’s implemented using a time-proportional format, otherwise the response could be haphazard and inefficient. In a few of of my earlier articles as given below: Simple Remote Controlled Fan Regulator Circuit Push Button Fan Regulator with Display Circuit Dimmer Circuit for LED […]

Filed Under: Voltage Control and Protection Tagged With: Control, Phase, Proportional, PWM, Time, Triac

Battery Backup Time Indicator Circuit

Last Updated on July 15, 2019 by Swagatam 2 Comments

In this post I have explained a battery backup time indicator circuit for monitoring the battery power usage by the connected load and for estimating the approximate remaining backup time of the battery. The idea was requested by Mr. Mehran Manzoor. Circuit Objectives and Requirements I want a circuit which shows remaining time of backup […]

Filed Under: Battery Charger Circuits Tagged With: Backup, Battery, Indicator, Time

3 Interesting DRL (Day Time Running Light) Circuits for Your Car

Last Updated on February 23, 2025 by Swagatam 111 Comments

DRL 2

DRL or Day Time Running Lights are a chain of bright lights mostly LEDs installed just under a vehicle’s headlight, which illuminate automatically during day time to ensure that others can distinctly notice the vehicle approaching even from a distance. The following customized DRL circuit was requested by Mr. Jivesh Technical Specification as Provided by […]

Filed Under: Automobile Electronics Tagged With: Circuits, DRL, Interesting, Light, Running, Time

Making a Time Machine – Concept Explored

Last Updated on November 13, 2023 by Swagatam 3 Comments

Wondering how to travel in time? Learn it with great Sir Stephen Hawking, according to whom time warp may be an option but seems pretty impractical, the reason being the feed back loop which will just oppose the feasibility of making a time machine and the concept using this theory. Are you intrigued by the […]

Filed Under: Electronics Theory Tagged With: Concept, Explored, Machine, Making, Time

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