remote led light circuit diagram using ps2502

An LED will fail if the current flowing through it is excessively high. This issue can be easily resolved by incorporating a simple resistor in series, which is an effective and low-cost solution. However, as the power supply voltage increases,...

Low power long life LED flashlight Joule Thief circuit

A low power, long-life LED flashlight circuit. Electronic Design proposed a simple circuit to resolve this in a recent article. The front end of their circuit draws less than a milliamp of extra current. The described LED flashlight circuit is designed...

Comes with rechargeable lead-acid battery LED emergency light circuit diagram

The circuit diagram depicted in Figure 5 illustrates a system for charging a lead-acid battery using 220V AC power. The circuit employs a capacitor, buck converter, and diode rectifier for this purpose. A red LED indicates the charging status. When...

Low Cost Dimmable Led Ballast Using The Valley Fill Current Shaping Circuit

The BFP640 transistor is utilized for 1575 MHz Global Positioning Satellite (GPS) applications, specifically as a Low Noise Amplifier (LNA). The design objectives include a minimum gain of 16 dB, a noise figure of less than 0.6 dB, an input/output...

Ice warning and lights reminder

This device informs a driver whether their lights should be activated and warns them if the outside temperature approaches zero degrees Celsius by illuminating an LED and sounding a buzzer. The sensitivity can be adjusted using VR1, and the light-dependent...

LED Flasher

The concept of this cost-effective flashing LED indicator is straightforward: it utilizes a low-frequency oscillator to control two LEDs. This flashing LED indicator circuit is designed to provide a visual signal using two light-emitting diodes (LEDs) that alternate in illumination. The...

Electronic Cricket Match Game

This electronic cricket device is a gift for children. This simple battery-powered circuit can be used to simulate a cricket match with friends. Each LED in the circuit represents various statuses of the cricket match, such as a six, run...

Reuse Old Mobile Phone Battery for LED lighting

Mobile batteries typically have a lifespan of 2 to 5 years under normal usage, after which they need to be replaced. Currently, inexpensive replacement batteries are available for about $1, but these low-cost options only last 6 to 12 months....

Handy Pen Torch circuit

This easy-to-construct handy pen torch electronic circuit features a low component count and utilizes two power white LEDs for illumination. A low voltage (4.8V DC) supply is sourced from a built-in rechargeable Ni-Cd battery pack, which is converted into two...