white led lamp circuit | Next Electronics

Led light based music circuit with LM3914

This is a simple light-running circuit synchronized with music. The circuit is straightforward, operating in mono, and requires only a few components. It can be connected to the output of a CD player. The described circuit utilizes a basic audio input...

Phone in use indicator by LED

This circuit is useful to show when your line is busy. I used for this a pair of SMT transistors, the LEDs on when the voltage drops down to 40 V. The circuit described functions as an indicator for a busy...

High-intensity LED Warning Flasher circuit

This circuit is designed as a warning flasher to alert road users to dangerous situations in low-light conditions. It can also function as a bicycle light, subject to applicable traffic regulations. White LEDs are recommended for use as a front...

LED Battery indicator

This battery allows the indicator to the car battery voltage monitor. The indicator has four LEDs which indicate power. The more LEDs, the higher the voltage. The last LED is a flashing LED. It comes on when the accuspaning limit...

Dark-activated LED or Lamp Flasher

This circuit adopts the rather unusual Bowes/White emitter coupled multivibrator circuit. The oscillation frequency is about 1Hz and is set by C1 value. The LED starts flashing when the photo resistor is scarcely illuminated. The onset of flashing can be...

Using LED lights do motor phase failure protection

The circuit illustrated below activates a small relay (J) when there is an imbalance in any one phase of a three-phase circuit. This relay triggers an external control contact, which immediately disconnects the power supply to the main circuit AC...

ALPHANUMERIC LED DISPLAY PROJECT

A tiny sandwich flag connected perpendicular to the motor spindle aids observation of how long it takes to complete one full rotation. This worked initially, as each burst from the capacitor barely moved the flag 1/4 of a rotation. As...

Sound Synchronized LED Video Tutorial

It is possible to synchronize the LEDs so that the speakers continue to play loudly while the LEDs are not always illuminated during music playback. The individual has a solid understanding of electrical concepts and is seeking a method to...

LED STEREO SOUND LEVEL INDICATOR

LED stereo sound level indicator for audio amplifier. Many circuits can be designed as level indicators by using a comparator IC or transistors, but... The LED stereo sound level indicator serves as a visual representation of the audio signal levels in...