LED high power modulator
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LED flashlight based on a white LED
The JarLight is a compact flashlight utilizing a white light-emitting diode (LED) and powered by a single battery cell. This configuration allows for a highly compact design with significant light output and extended operational life, both for the battery and...
LED Flash Driver with HT2050
This circuit is based around HT2050 manufactured by HOLTEK semiconductors. It is a low cost, low-power C-MOS LSI designed for lamp and LED flash driver. It requires minimum external components. You can operate it with just two AAA cells or...
Light emitting diode LED displays the basic structure of the driving circuit
The circuit drives the light-emitting diode in a digital display configuration. The count signal is fed into the ICM7217 chip, which processes the count and subsequently drives the digital display board. The connection between the thumbwheel switches is illustrated in...
Video and DVD Modulator Circuit Electronic Diagram
The following circuit illustrates a Video and DVD Modulator in a VHF/UHF electronic diagram. Features include an oscillator that utilizes a transistor for high-frequency operation.
The video and DVD modulator circuit serves to convert video signals into a format suitable for...
Audio 10 LED VU meter
The circuit was designed to work with an audio power amplifier which operated off +18v-0v-18v power rails. The actual voltage used is not too critical except that the feedback is referred to the LED chain which itself is anchored to...
Four flashing lights string circuit 2
The circuit utilizes a four-way slowly dimming LED driver integrated with iU shoe production and a Qis four flashing lights string controller. The C3484 manifold is specifically designed to operate Ji lights with four lights that flash and slowly fade....
Fish Tank Lights and Temperature Detector
When the tank is cleaned the fish are removed and placed in a small amount of the tank water. The problem is that fish don’t like rapid temperature fluctuations. A simple in-tank or stick-on thermometer would have sufficed, but adding...
led sign
This sign design does not utilize a microprocessor. Instead, it employs an EPROM and multiple counters. Similar to most electronic signs, the LEDs are arranged in a matrix and are stroboscopically activated at a high frequency to create the illusion...
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...