Fuse tester with LEDs
The described circuit functions as a fuse indicator using a dual LED configuration to visually represent the status of the fuse in a 230 V AC system. The primary components involved include a dual-color LED (LED2), resistors, diodes, and a fuse (F1) itself.
The dual LED, designated as LED2, has a common cathode configuration, allowing it to display two states: green for indicating that the fuse is intact, and red for signaling a blown fuse. The operation of this circuit relies on the correct biasing of the LED through the use of resistors and diodes.
The resistor R1, specified as 120 kOhm with a power rating of 1 W, serves as a current-limiting component for the LED. This resistor's value can be adjusted to accommodate different voltage levels, making the circuit adaptable for use with voltages other than the nominal 230 V AC. When the fuse (F1) is operational, the current flows through R1 and illuminates the green segment of the LED. Conversely, if the fuse is blown, the circuit configuration allows for the red segment of the LED to light up, indicating a fault condition.
The circuit also includes diodes D1, D3, and D4, which are 1N4007 types, functioning as rectifiers to ensure that the AC voltage is converted to a usable DC voltage for the LED operation. The Zener diode (D2), rated at 5.1 V and 400 mW, is included to provide voltage regulation and protect the LED from excessive voltage spikes that may occur in the circuit.
In summary, this fuse indicator circuit not only provides a straightforward visual indication of fuse status but also incorporates protective elements and adaptability for different voltage levels, making it a practical solution for monitoring fuse integrity in various applications.This indicator shows through a dual-LED see if a fuse is intact. The module is designed for 230 V AC. The green LED illuminates when the fuse is still good, the red lights when the fuse is broken. Perhaps the circuit to adjust for other voltages by changing the value of R1. R1 = 120 kOhm / 1 W LED2 = Duo LED green / red common cathode D1, D3, D4 = 1N4007 D2 = 5.1 V 400 mW Zener F1 = fuse 🔗 External reference
Related Circuits
This circuit is particularly beneficial for hobbyists using a breadboard to experiment with ideas, as well as those employing a simple homemade DC power supply that consists of a transformer, rectifier, smoothing capacitor, and protective fuse, specifically one lacking...
These small electronic lamps are quite practical and have a long lifespan. Approximately 40 years after Nick Holonyak invented the first LED, they have become nearly essential. Any dedicated electronics enthusiast typically keeps a few in their collection. Prior...
The electronic scheme provided can be used to design a Zener diode tester utilizing a few electronic components. This Zener tester, in conjunction with a multimeter, allows for the precise measurement of the threshold voltage of a Zener diode....
Most telephone equipment today utilizes a DTMF receiver integrated circuit (IC). A widely used DTMF receiver IC is the Motorola MT8870, which consists of 18 pins and is employed in telephones and various other applications. When projects utilizing this...
The JFET Pierce oscillator is designed to test any crystal within a frequency range of 50 kHz to 25 MHz, accommodating the upper frequency limit of fundamental-mode crystals without the need for tuning. It is capable of driving a...
This transistor has only one IC tester and can test all types of transistors. With two LEDs indicating the type of the transistor is NPN or PNP. The circuit uses a CMOS 4049 IC. The test transistor to terminals...