yard light circuit | Next Electronics

This document outlines the construction of a trimet. The required components include three capacitors, a 2N3904 transistor, a 2N3906 transistor, a resistor with a value between 1k to 10k ohms, and a solar cell with a minimum voltage of 3...

LED output from SB Live! Value

Many modern audio recorders are now compatible with digital input S/PDIF (Sony/Philips Digital Interface). Devices like CD changers, MiniDisc recorders, computer sound cards, and the like work with digital signals using the S/PDIF protocol. This digital connection between two devices,...

Arduino BarGraph

The bar graph, which consists of a series of LEDs arranged in a line similar to those found in audio displays, serves as a common hardware interface for analog sensors. It is constructed from a row of LEDs, an analog...

dual LED flasher

A two-transistor circuit that alternately flashes two LEDs on and off. This tutorial demonstrates how beginners in electronics can build this simple circuit on a breadboard. This circuit utilizes two NPN transistors configured in a flip-flop arrangement, which allows for the...

led dimmer circuit

This schematic illustrates a simple yet effective LED dimmer circuit utilizing the well-known voltage regulator IC LM317T. The LM317T can function as a current regulator, as demonstrated in this circuit. It features ten super bright white LEDs, although the quantity...

AC LED drive circuit

The circuit operates effectively even when the polarity of the voltage or the power supply is reversed. It functions with DC drives similar to AC drives, utilizing a current limiting resistor R. The value of this resistor is determined based...

Wave Joule Thief circuit

A series of LEDs that turn on and off in a precise sequence, creating a calming and hypnotic effect. Various LED chaser, scanner, and sequencer circuits exist, utilizing discrete transistors, logic integrated circuits (ICs), or microcontrollers. However, a common limitation...

Stereo VU Meter

This is a stereo LED level meter. It is the most affordable and effective bar graph display available, utilizing commonly accessible components. The circuit requires only a few LEDs, 22 transistors, some resistors, diodes, and a set of electrolytic capacitors,...

LED Torch Uses Blocking Oscillator

This simple LED torch is driven by a 2-transistor blocking oscillator that steps up the voltage from a 1.5V cell. It relies on the inherent current limiting of the 150 µH choke to protect the white LED from overdrive. With...