Keep the red phobe (+) and the black phobe (-) in either terminal of the diode.Rotate the central knob to where the diode symbol is indicated which is the diode checking mode in the digital multimeter.The link to the datasheet is given below to see more details and specifications of the 1N4007 diode. This is not a recommended design for practical projects but the example circuit is used just to demonstrate the use of 1N4007 diode. A similar process happens for each of the diodes and the input voltage gradually decreases from 9 Volts to the required 3 Volts and can be used for the operation of any electronic equipment with a need of ~ 3V. When the forward current flows from the first diode through an anode to cathode terminal, 0.6V voltage drops across the first diode and the input voltage for a second diode is 9-0.6 = 8.4v. To obtain 3 Volts from a 9 Volts power supply, ten 1N4007 diodes are connected back-to-back in a series configuration. Making use of this potential drop, we can make a voltage regulator per requirement. The schematic is a pictorial of a voltage regulator :Ī diode has a depletion region, and when surpassing the barrier, there is a voltage drop of 0.6 Volts. This circuit demonstrates the use of 1N4007 diodes as a voltage regulator. On the other hand, the second circuit demonstrates the reverse-biased condition in which current can not flow due to depletion region, and the LED does not glow. The current flows through the LED, and it illuminates. In this way, the diode’s anode is at a higher potential than the cathode, due to which the current can surpass its depletion region. The anode is connected to the power supply, and the cathode is connected to the ground. The first circuit shows the forward-biased condition of the diode. The two circuits represent the states of the diode. The given proteus simulation is the perfect example of the switching concept of the diode: 0.6V is a forward drop voltage of 1N4007. When this applied input voltage becomes greater than 0.6 volts, IN4007 diode acts as a short circuit. When the input voltage applied to the anode terminal is +ve as compared to the cathode terminal, the diode is said to be forward-biased. Now, we will see some example circuits of 1N4007 in this section : 1N4007 in Forward and Reverse Biased Mode Some of the other features are mentioned below : Operating Junction Temperature : -550C – 1750C.Non-Repetitive Peak Forward Current: 30A.Therefore, you should use it for low frequency applications only. 1N4007 is a low-frequency diode due to high recovery time. The higher is a frequency of input signal, the higher time diode takes to recover its state. During recerse recovery, diode produces a high reverse current which produces heat. Like all diodes, 1N4007 also requires a reverse recovery time to recover during switching from forward to reverse biased mode. ve carriers and the current always leaves from a cathode terminal. +ve carries terminal and current always flows into the anode. The following tables lists the pin details of anode and cathode terminals: Pin Name During reverse biasing a leakage current flows through a diode which is negligible compared to forward current. Reverse biasing will restrict the flow of current and can damage the device if voltage applied is greater than reverse breakdown voltage. The current which flows from anode to a cathode terminal is known as a forward current. The diode has two states based on the connection of anode and cathode.įor the current to flow from anode to cathode, the anode should be connected to a higher potential than the cathode(forward biasing). It has two terminals, i.e., Anode(positively-charged) and Cathode(negatively-charged). Following diagram shows the logic symbol pinout of 1N4007 diode:
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