boun light circuit | Next Electronics

This is a programmable clock timer circuit that utilizes individual LEDs to signify hours and minutes. Twelve LEDs can be arranged in a circular formation to represent the 12 hours of a clock face, while an additional 12 LEDs can...

meter How to light an LED when a voltage hits a certain point

A LED is used to indicate when a DC voltage reaches 5 volts or more. The LED should be fully illuminated at 5 volts and not dim at 4.5 volts or lower. The circuit should be constructed using discrete components,...

LED Flasher Circuit Using Transistors

This LED flasher circuit is a classic two-transistor flip-flop. It is a popular circuit often built by beginners in electronic circuit design. The schematic diagram of this well-known LED flasher circuit consists of two transistors, two capacitors, four resistors, and...

home-garden-light-led

Currently, white LEDs are available that emit a significant amount of light. Their brightness is such that direct eye contact should be avoided. Although they are still relatively expensive, this is expected to change in the future. A highly effective...

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...

LED Blown AC Fuse Indicator

LED Blown AC Fuse Indicator Circuit Diagram. This circuit monitors an AC fuse. In this circuit, the LED indicator shows whether or not the fuse is blown. The LED Blown AC Fuse Indicator Circuit is designed to provide a visual indication...

LEDs Fade In/Out Circuit Problem and LED Sequencer

A circuit was constructed based on an LED beating heart frame instructable, but it is not functioning as expected. There is also mention of a built LED sequencer. The LED beating heart circuit typically involves a microcontroller, such as an Arduino,...

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...

10 LED VU meter with LM3915

Supply voltage: 12 V. Supply current: 10 mA in stand-by, max. 80 mA. Input voltage: min. 20 mV rms. Indication range: 30 dB. LED currents: 7 mA. Ref. voltage of IC2: 5 V More: R1 - trimmer 100 k mini...