Dimming controlled led with lm3409
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The power indicator circuit
The ACER PM02 MP4 machine features a voltage status indicator circuit. When power is supplied, a red LED illuminates, indicating that the device is powered on. Upon entering operational mode, a green LED lights up.
The voltage status indicator circuit serves...
Schematics High Power LED mood Lamp PCB
This page introduces an engaging project designed by Toon Beerten, titled "DIY LED Mood Lamp." This project serves as an intriguing addition to any room, guaranteed to impress viewers. The lamp features a color-fading effect that enhances its visual appeal....
LED Stroboscope with EG1951-ND
The rotary switch is available for $5.00USD as of 2003 from DigiKey under part number EG1951-ND or EG1952-ND. It is a real pain to operate this circuit without a proper switch. You can put multiple 4017 ring counters in series...
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...
Wheel Of Fortune
This circuit is a 10-LED spinning wheel that "clicks" as the wheel passes each point. The rotation starts fast, then gradually slows down to a random stop (with a click at each position). After the rotation ceases, the selected LED...
brain wave machine
A simple design for brain-wave goggles can be created using appropriate eyewear, such as safety glasses, along with an array of Light Emitting Diodes (LEDs). The control of the LED flash rate is managed through the PC's parallel port. Audio...
LED Lighting For Consumer Unit Cupboard
The consumer unit cupboard in some older houses is poorly illuminated. If a bell transformer is also situated in this cupboard, it can be utilized to provide emergency lighting using two high-current LEDs. These diodes are powered through a small...
Propeller Clock Mechanically Scanned LED Clock
A motor spins the "propeller", and a small microprocessor keeps track of time and changes the pattern on seven LEDs with exact timing to simulate a 7 by 30 array of LEDs. It is an illusion, but it works nicely.
The...
19 LED Clock circuit
The clock circuit above uses seven ICs and 19 LEDs to indicate binary coded decimal time. The LEDs can be arranged so that each horizontal group of 3 or 4 LEDs represents a decimal digit between 0 and 9 and...