Second Patent

It happens that the car malfunctions in the middle of the road while traveling,,or late at night. In general, the malfunction may occur in the car and it is difficult to obtain a maintenance technician. Fuses often cause these malfunctions, and the devices that the car driver needs to check the fuses are either expensive, require a technician to use, or do not measure the validity of the fuse correctly (there may be rust on both ends of the fuse, which reduces its efficiency and may even be a cause of the malfunction). This new device is distinguished by the fact that it does not require removing the fuse from its location and does not depend on the car battery. When the poles of this device are connected to the ends of the fuse, the device emits sound and light at the same time. If the fuse is damaged or has high resistance, the device will not emit sound or light. Whether the fuse is valid or not is determined by light and sound, and therefore the device is suitable in places of intense noise or intense light. Another advantages of the device is that it is cheap, operates on 3 volts, consists of simple components, does not have a screen, and does not require adjustment.