In this post I have explained a two op amp IC 741 and LM358 based auto cut off battery charger circuits which are not only accurate with its features but also allows a hassle free and quick setting up of its high/low cut-off threshold limits. High current batteries can e also charged using these circuits. […]
New Circuit Projects
Simple Peak Detector Circuit to Detect and Hold Peak Voltage Levels
In this article I have explained about a peak detector circuit, its working principle and how to implement it in clap operated circuits for illuminating an LED in response to clap sounds. What is Peak Detector A peak detector is a circuit which holds maximum amplitude value of a signal. If a signal varies rapidly […]
Small Induction Heater for School Project
In this post I have explained a small induction heater circuit for school project and exhibitions, using a very ordinary IC 555 astable PWM circuit. The idea was requested by Mr. Anthony Technical Specifications For a school project i need to construct an AC induction cooktop and was wondering if you could help me put […]
How to Build a Microphone Amplifier Circuit
In this article we are going to see how to build a microphone amplifier circuit with operational amplifier LM324. This circuit can be used as good pre-amplifier for audio projects. Selecting an Opamp The heart of the mic amplifier circuit is an op-amp LM324 which is quad op-amp moulded in single IC. We are going […]
Make this 18V Cordless Drill Battery Charger Circuit
In this post I have explained how to build and use a 18V battery charger circuit for a cordless drill machine. The idea was requested by Mr. Chibuzo. Technical Specifications The Design Whether it’s a lead acid battery, a Ni-Cd or a Li-ion, this multipurpose battery charger shown below can be applied for any of […]
Make this Home Security Project Using Arduino – Tested and Working
In this article we are going to see how to build a home security system circuit using arduino which might save your home from intruders one day. Housebreaking happens every few seconds in the world. By the time you read this sentence, crooks already broke into someone’s house. A golden rule: Prevention is better than […]
