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Explained

Explained: Snubber Circuit for MOSFET H-Bridge

Last Updated on June 8, 2025 by Swagatam 38 Comments

Here we are going to talk deeply about snubber circuits and why we must use them with MOSFET H-bridge circuits. Because if we do not put snubber in H-bridge then that MOSFETs might blow off during switching. Specially when we drive inductive loads like transformer, motor, relay, solenoid, etc. then this thing becomes very serious. […]

Filed Under: Voltage Control and Protection Tagged With: Bridge, Explained, MOSFET, Snubber

Reed Switch Sensor Module Explained with Circuit Diagram

Last Updated on April 30, 2025 by Swagatam 2 Comments

Here we will try to understand this reed switch sensor module which may look small and nothing much, but it is actually very useful thing when we want to detect a magnetic field or just want to know if a magnet is coming closer or going away. This thing is called a reed switch sensor […]

Filed Under: Sensors and Detectors Tagged With: Explained, Module, Reed, Sensor, Switch

IC LM7912, -12V Negative Voltage Regulator Explained

Last Updated on May 18, 2026 by Swagatam Leave a Comment

In this post we are going to learn about one super old but gold IC called LM7912 or simply IC 7912. This one is not positive regulator like 7805 or 7812, but it is negative regulator which means it gives -12V output and not +12V. If you are making op-amp circuits or dual power supply […]

Filed Under: Datasheets and Components Tagged With: 12V, Explained, LM7912, Negative, Regulator, Voltage

Explained: MAX4466 Electret Microphone Amplifier Module with Adjustable Gain

Last Updated on May 15, 2026 by Swagatam Leave a Comment

In this post we will be talking about this MAX4466 microphone amplifier module, right? So this is a tiny little circuit that can amplify weak sound signals from an electret condenser microphone (ECM). That means it is going to take a very small electrical signal from the microphone and then boost it up so we […]

Filed Under: Audio and Amplifier Projects Tagged With: Amplifier, Electret, Explained, MAX4466, Microphone, Module

TPS24710/11/12/13 Hot-Swap Controller Circuit Explained

Last Updated on February 14, 2025 by Swagatam Leave a Comment

When we talk about hot-swap controllers, it is basically an electronic device or integrated circuit (IC) that allows you to the insert or/and remove circuit boards, modules or parts within an active system without having you to switch off the system. It regulates the surge current whenever a component is installed and protects from short […]

Filed Under: Voltage Control and Protection Tagged With: Controller, Explained, Swap, TPS24710

5 Useful Power Failure Indicator Circuits Explained

Last Updated on June 1, 2026 by Swagatam 51 Comments

power failure indicator circuit diagram

In this post I have explained 5 useful power supply failure indicator circuits which can be used to get an instant indication regarding an input power failure situation. This post includes the following 5 types power failure indicator circuits: Main Function The main function of the proposed power failure indicator circuits is to alert or […]

Filed Under: Indicator Circuits Tagged With: Circuits, Explained, Failure, Indicator, Power, Useful

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