SZ-9201 uses three function lights chain circuit

This circuit should only be attempted by individuals with a strong understanding of electronic devices. It is connected to a main power source (220V) and poses a risk of high electrical shock. This circuit operates at a mains voltage of 220V,...

LED Audio VU Meter Circuit

The LED meter circuit is more compact and simpler than its analog equivalent, making it a common choice in audio equipment. This circuit utilizes the LM3915 integrated circuit (IC) and operates in a logarithmic mode. It comprises a single IC...

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...

508A microcontroller can deliver a maximum of 25mA

A typical device that requires less than 5v and draws less than 25mA is an LED. A LED must be supplied with an exact voltage for it to operate correctly. Because it requires LESS than 5v, a dropper resistor (current...

bicycle back safety light

This circuit is designed to provide a clearly visible light, formed by 13 high-efficiency flashing LEDs arranged in a pseudo-rotating order. Due to its low voltage, low drain battery operation, and compact size, the device is suitable for mounting on...

R/C Airplane LED Flasher

This was designed to flash a pair of LEDs to be mounted on the wing tips of a Parkzone Citabria R/C (remote control) airplane. The unmodified Parkzone Citabria only weighs 20 grams (about 0.7 oz), so weight, and therefore the...

120 Volt 4 LED Light Circuit Schematic Diagram

If the AC supply is 220 volts, which resistor should be replaced and with which one? Since 220V is twice that of 110V, the resistance value needs to be doubled accordingly. It is suggested to replace the 9.1kΩ resistor with...

Using LED As A Light Sensor

This circuit demonstrates the use of a standard LED as a light sensor by utilizing the photovoltaic voltage generated across the LED when it is exposed to light. LEDs are cost-effective alternatives to photodiodes and include a built-in filter that...

12v led lamp circuit

This project involves a 12V LED lamp circuit that is notably simple. The circuit comprises five resistors and fifteen super bright white 5mm LEDs, which are readily available at low prices. It is compatible with any type of 12-volt battery,...