Electronic dimmer circuit touch light

Electronics Circuits Reference Archive Audio LED VU meter

The circuit is designed to operate with an audio power amplifier that uses 18V-0V-18V power rails. The specific voltage is not critical, but the feedback is referenced to an LED chain connected to a 12V rail, necessitating a separate stabilizer...

USB Blinky

Projects often involve numerous LEDs and microcontrollers; however, there is appreciation for simpler implementations using LEDs. One of the most basic LED circuits is... A basic LED circuit can be constructed using a single LED, a current-limiting resistor, and a power...

Magic Lights

The circuit illustrated in the figure utilizes 14 bi-color (red and green) LEDs, each featuring three terminals. This configuration enables the creation of various dancing color patterns, as each LED can display three distinct colors. The middle terminal (pin 2)...

10 led VU Meter using LM3915

The circuit diagram illustrates a straightforward circuit design featuring 10 LEDs. It employs a series of half-wave rectification using the precision IC2 TL071, along with a single LM3915 IC that regulates the LEDs, functioning as a VU meter indicator. The...

Battery Operated LED Lantern

Photo. This is the test circuit -the basic driver is only two transistors, two resistors, the circuit was evaluated using a white LED, but when it was time to button it up and archive it, I replaced the expensive white...

LEDs Fade In/Out Circuit Problem and LED Sequencer

A circuit was constructed based on an LED beating heart frame instructable, but it is not functioning as expected. There is also mention of a built LED sequencer. The LED beating heart circuit typically involves a microcontroller, such as an Arduino,...

1A Low Noise High Current LED Torch/Flash

An ultralow dropout current source maintains accurate LED current at very low ILED voltages. Automatic mode switching optimizes efficiency by monitoring the voltage across the LED current source and switching modes only when ILED dropout is detected. The LTC3216 is...

Lamp-Switching Circuit Circuit

A normally open pushbutton switch (SI) provides a positive input pulse to pin 4 of U1, activating the integrated circuit (IC). The output from U1 at pin 6 delivers base-drive current to a Darlington pair consisting of Q1 and Q2,...

LED VU meter circuit by transistor

The VU meter operates in conjunction with the integrated amplifier circuit. The audio signal is processed by the audio amplifier circuit, which drives the VU meter to display the audio level. The VU meter circuit is designed to visually represent the...