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Mains Operated LED Circuit Schematic circuit

Compact yet highly functional, this is a straightforward and efficient LED circuit designed to operate directly from the AC mains supply, ranging from 100 volts to 230 volts. This LED circuit utilizes a few essential components to achieve efficient operation...

Simple power Supply for LEDS

LEDs are great display tools. Their prices have decreased to a point where they are replacing more conventional light sources. In one sense, their characteristic need for low voltages is an advantage, e.g., compatibility with I.C. drives, but this voltage...

Password(code) Based Digital Locking System Using Microcontroller 89C52/89S52

Upon entering the password, the application, in this case "LED," will illuminate. In this digital locking system project, the interfacing of a keypad and a 16x2 LCD with a microcontroller will be explored, along with the accompanying code. This project...

Ultra Bright LED Lamp

This ultra-bright white LED lamp operates on 230V AC with minimal power consumption. It is suitable for illuminating VU meters, SWR meters, and similar applications. The ultra-bright white LED lamp designed for 230V AC operation offers significant advantages in terms of...

Home Security System with microcontroller

Security is a prime concern in our day-to-day life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. The Microcontroller based Home Security System can be adopted...

Color Sensor from a Reversed LED and Op Amp

One of the first lessons that electronics students learn is that an LED emits light when current flows through it. However, it is also true that when an LED is connected in reverse, it can generate a current flow when...

light up pumpkin

The concept involves placing a pair of yellow LEDs inside a pumpkin, combined with a photo sensor that activates the lights at night. The circuit is simple, utilizing minimal components. Two schematics are provided on the project site, with a...

Led circuits

The circuit below illustrates powering one or two LEDs from the 120-volt AC line using a capacitor to drop the voltage and a small resistor to limit the inrush current. Since the capacitor must pass current in both directions, a...

Christmas LED Light String Display

This project demonstrates the construction of a simple LED light string display utilizing seven 24V LED light strings. The project was designed for Christmas 2009 to adorn a balcony with lights. The light strings are widely available, particularly in Sweden,...