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Here’s a great tutorial showing how to build an LED dimmer using a 555 timer IC and PWM

How to build an LED dimmer using a 555 timer IC ,IRFPZ44N and PWM

Mic Connection with PAM8403 5V Audio Amplifier Circuit

Mic Connection with PAM8403 5V Audio Amplifier Circuit

220V AC to 12V DC Capacitor Power Supply Circuit

Convert 220V AC to 12V DC Without Transformer | Simple Capacitor Power Supply

Police Siren Circuit using 555 Timer IC

Police Siren Circuit using 555 Timer IC

Rider LED Sequencer

Rider LED Sequencer Light using CD4017 IC and 555 Timer IC

What is a Rectifier

What is a Rectifier? | Types, Working, and Applications

HOW TO MAKE OVER CURRENT PROTECTOR

How to Make Overcurrent Protection Circuit (12V 3A) using 555 Timer IC

Delay Timer Switch Using BC547

How to Make Delay Timer Switch Using BC547 Transistor

Variable Power Supply Using IRF3205 MOSFET

How to Make Variable Power Supply Using IRF3205 MOSFET

A Digital Clock Using Arduino and LCD Complete Guide

A Digital Clock Using Arduino and LCD | Complete Guide