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5 Simple Power Bank Circuits for Mobile Phones

Last Updated on May 17, 2026 by Swagatam 174 Comments

powerbank

In this article I have explained a 5 assorted power bank circuits using 1.5V cell and 3.7V Li-ion cell which can be built by any individual for their personal emergency cellphone charging functionality. The idea was requested by Mr. Irfan What is a Power Bank Power bank is a battery pack which is used to […]

Filed Under: Battery Charger Circuits Tagged With: Bank, Circuits, Mobile, Phones, Power, Simple

Simple Electronic Fuse Circuit

Last Updated on May 16, 2026 by Swagatam 50 Comments

carelectronicfusecircuit

In this article we investigate a electronic circuit design which works like a conventional fuse for safeguarding any electrical system from overloads, over-current, short circuit and related fire hazards. However, the main advantage of this electronic fuse is that it does not require frequent replacements like mechanical fuses, instead it can be reset with a […]

Filed Under: Automobile Electronics Tagged With: Electronic, Fuse, Simple

Simple Ignition Code Lock Circuit for Automobile Protection

Last Updated on May 16, 2026 by Swagatam 15 Comments

codeswitch 1

This extremely simple code lock switch circuit can be used for locking a vehicle’s ignition by typing a hidden code over the given micro switch keypads. So now you can use this simple code lock ignition circuit for probably securing your car from a possible theft. Alternatively the circuit may be used for any application […]

Filed Under: Automobile Electronics Tagged With: Automobile, Code, Ignition, Lock, Protection, Simple

Simple Car Shock Alarm Circuit

Last Updated on May 16, 2026 by Swagatam 6 Comments

CARSHOCKALARMCIRCUIT

A simple car shock alarm circuit I have I have explained in this article can eb effectively used to alarm the owner each time the car comes across some kind of vibrational intrusion ether from a potential theft of simply a damaging hit from  an external source. Introduction Today most of the cars are equipped […]

Filed Under: Automobile Electronics, Security and Alarm Tagged With: Alarm, Shock, Simple

Simple Capacitive Discharge Ignition (CDI) Circuit

Last Updated on May 16, 2026 by Swagatam 348 Comments

cdi

In this post I have explained the circuit for a simple, universal capacitive discharge ignition circuit or a CDI circuit using a standard ignition coil and a solid state SCR based circuit. For an audio/video explanation, you can watch the following video representation: How Ignition System in Vehicles Work The ignition process in any vehicle […]

Filed Under: Automobile Electronics Tagged With: Capacitive, CDI, Discharge, Ignition, Simple

5 Simple Siren Circuits you can Build at Home

Last Updated on May 16, 2026 by Swagatam 12 Comments

20150812 183122 2

In this post I have explained about a 5 simple siren circuits, using Arduino and also with ordinary components such as transistors and capacitors yet is able to produce an alarm sound at an excruciating level. The idea was contributed by “Abu-Hafss” Deeper in the article we also learn to make an advanced Arduino based […]

Filed Under: Automobile Electronics Tagged With: Build, Circuits, Home, Simple, Siren

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