segment led using l7107
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36 Led Flasher Driver Circuit
Originally designed as a three-bell animation circuit for Christmas decorations, this circuit can also be utilized for various other applications that require a flashing effect. By reconfiguring U2 (refer to the data manual), it is possible to achieve more than...
LED Power Failure Light
The power failure light that I eventually designed and built is housed in the plastic case from a wall-mounted power transformer. I had accidentally destroyed the transformer by shorting its output, and had kept the plastic case for years, just...
LED Boost converter Joule Thief circuit
Previously, a boost circuit was tested that enables the powering of a 3 V LED using a discharged battery (approximately 1 V or lower). This circuit consists of a single transistor, one resistor, and a small transformer with a 1:1...
230V Blinking LED
A pulsating light is used for signaling purposes with a voltage of 230V. A simple circuit has been designed, consisting of an LED diode, two capacitors, two resistors, a diac, and a diode. The operation of the circuit is straightforward....
LED Colour Organ circuit
Most existing designs utilize direct switching of lights without any software control and include manual potentiometers for light sensitivity and overall gain settings. There are limited references regarding the frequency filter circuitry, explaining the specific frequencies the circuit is designed...
simple and cheap dark detecting led
How can an LED be activated in low light conditions? This scenario, often referred to as the "nightlight problem," is applicable in various situations such as emergency lights, street lights, and even computer keyboard backlights. There are numerous solutions available....
Dancing LED's circuit
Here is a simple circuit which can be used for decoration purposes or as an indicator. Flashing or dancing speed of LEDs can be adjusted and various dancing patterns of lights can be formed. The circuit consists of two astable...
220V AC Powered White Led Lamp
The circuit provides sufficient illumination suitable for reading purposes. Capacitor CX, in conjunction with diodes D1 through D4, constitutes the AC step-down circuit. CX lowers the high voltage AC from the mains to a low voltage AC, which is subsequently...
High-intensity LED Warning Flasher
This circuit is designed as a warning flasher to alert road users to dangerous situations in low-light conditions. It can also function as a bicycle light, adhering to traffic regulations. White LEDs are recommended for use as a front bicycle...