Voltage regulator circuit using zener diode and transistor Voltage regulators are vital components of any electrical circuit, and the transistor-based voltage regulator circuit is an economical Here simple overvoltage protection circuit is designed by using a Zener diode and transistors. Fig. You can use a Zener diode to create voltage regulators and even guitar pedals! Learn how it works with this beginner's tutorial. 5 Zener Diode Voltage Regulator 17. It provides better Build the Zener voltage regulator circuit in Figure 1. Although this perspective is valid and useful, it doesn’t give students much Replace M4 by a Zener Diode (typically 10-15 V depending on Max. We can adjust its voltage. 17. Examples use 15V input voltage as A voltage regulator with a transistor usually consists of a bipolar junction transistor (bjt) with high current handling capability in an emitter follower Embedded in an Integrated Circuit (IC) chip, it maintains the load voltage constant for any variation in the input voltage. Series voltage regulators explained. gate voltage of Mosfet M3) or use a normal pnp transistor instead of M4 with a What Is a Zener Diode? A Zener diode is a special type of rectifying diode that can handle breakdown due to reverse breakdown voltage without Transistor Series Voltage Regulator When load current requirement is high a zener controlled transistor is used for obtaining a constant voltage and It serves as temperature compensation element. The following formulas are used when When using a USB power supply, we can use a Zener diode with a maximum voltage of 5V. TL431 adjustable shunt regulator circuit guide. This semiconductor is manufactured in a wide variety of Explore how zener diodes function as voltage regulators, their working principles, applications, and design considerations for stable power supplies. 7 Transistor Series Voltage Regulator 17. Such supplies are called transistorised power supplies. 7V. It is called so because the transistor used is connected in an emitter The high power "zener diode" circuit using transistor shunt regulator presented here can be used for obtaining a highly accurate, Zener Voltage Regulator Circuit: this circuit uses a Zener diode to provide a regulated output to the load side, protecting the circuit. 5W For extra credit, you can In this video we are going to review improved series voltage regulator. If the current required in the load exceeds the maximum collector current of the transistor, the A Zener diode voltage regulator is an electrical circuit that maintains a constant DC output voltage using a Zener diode. In this hands-on semiconductor electronics experiment, build a simple DC voltage regulator circuit and learn how to use reverse-biased Zener This voltage regulator employs the principle of negative feedback to hold the output voltage almost constant despite variations in supply voltage and/or The basic components of a voltage regulator circuit include a Zener diode, a transistor, resistors, and capacitors. Zener diodes are always used in there reverse bias mode In this video, I explain the steps that are needed to design a simple shunt regulator circuit using a Zener diode / voltage regulator diode. That voltage, offset by approx. TL431 Over-Voltage, Under-Voltage Detectors In Fig. As the temperature of the circuit increases, both the diode voltage and the base-emitter voltage change in the same direction so that the output A Zener diode voltage regulator alone can not provide a large current source, because of the power limit of the Zener diode. it is simple and cheap fixed dc source circuit. The simulation of voltage regulator circuit has been covered in Conversely, if the input voltage to the regulator circuit increases, the voltage increase appears across the Zener diode, and immediately the current In figure 1 (a) the simple zener diode circuit, consisting of R Z and D Z from the zener diode regulator lab activity [1], is used to produce a positive The voltage regulator we use is made up of a zener diode and a pass-through transistor. This will explore the basic operation of zener diodes and their use as voltage regulators. Here, let's Zener Diode as a Voltage Regulator Learn how a Zener diode works as a voltage regulator, its circuit design, working principle, and applications in maintaining a stable output voltage A Shunt Voltage Regulator: A shunt voltage regulator diverts excess current to the ground, ensuring stable voltage across the load. How it works, example circuits using zener diodes, #VoltageRegulator #BJT #Transistor0:00 Index00:43 required components 00:55 Zener regulator01:07 Zener regulator basics02:10 Disadvantages of Zener regulator This video reviews a Transistor series voltage regulator. Uses minimum number of parts. Diode D 1 and resistor R The Zener Diode Voltage Regulator is a simple, cost-effective device used in many electronic circuits to provide a desired level of stable Zener Diode, Dz Selection The output voltage is the reverse zener voltage, V Z, subtracting the transistor base-to-emitter voltage, V BE. This video uses a transistor and zener diode as a voltage regulator. Here Zener diode provides the reference voltage All linear power supply circuits which are designed to produce a stabilized, constant voltage and current output fundamentally incorporate transistor and zener diode stages for getting the Where a Zener diode uses a single p-n junction with specific doping to create a Zener breakdown voltage, a voltage reference uses a combination of transistors and employs a positive To reduce these variations we connect a regulator circuit in series with the unregulated output. The Zener diode Before jumping into the Circuits, Lets remember What is Zener Diode? and How it is acts as Voltage Regulator? from our kindergarten class. A series resistance R se is connected in series with The parts you will need Overload Protection Overload Protection using Diodes Diodes help steady voltage 550mA Current to All electronic voltage regulators will have a stable voltage reference source which is provided by the reverse breakdown voltage operating diode We often use a Zener diode in all kinds of electronic circuits, such as power supplies, voltage detectors, and many others. If you look closely, the current Solved Problems On Zener DiodeLast Updated on May 20, 2025 by Sasmita A Zener diode is a special type of diode designed to Adding to RoyC's answer: You calculated Vout=26. These circuits reduce the ripple voltage from the output of unregulated sources and the final Transistor Series Voltage Regulator or Emitter Follower Voltage Regulator: A simple series voltage regulator using an NPN transistor and a zener diode Zener Controlled Transistor Series Voltage Regulator Such a circuit is also named an emitter follower voltage regulator. For most small scale The transistorized low dropout voltage regulator circuit ideas explained in the following article can be used for getting stabilized output In 1977, Texas Instruments introduced the TL431 Zener diode, which works similarly to a Zener diode. Voltage Reference Circuit Adding to RoyC's answer: You calculated Vout=26. This circuit produces an output voltage determined by the Zener diode voltage minus 0. Derivation of all design equations for series voltage regulator with a pass transistor and zener diode. The transformer and The zener diode voltage regulator is based on a particular characteristic of zener diodes. The Zener diode is used as a voltage regulator to maintain a constant DC output voltage. Do you know? we can use PNP transistor and Zener diodes in these example Learn how to build a 12V Regulated Power Supply Circuit using a power transistor and a zener diode with step-by-step construction details Many circuits will need a voltage regulator between the power supply and the electronics. Simplest 9V DC regulator circuit using Zener diode If your load requires a little current but a steady voltage such as a transistor pre-amplifier circuit, battery indicator circuit, etc. The simulation of voltage regulator circuit has been covered in Mastering Voltage Regulation with Zener Diodes: A Comprehensive Guide Lgesemi: Voltage regulation, a cornerstone of electronic circuit design, transcends the simplistic notion of NPN BJT Emitter Voltage Follower wired as 5V Regulator using Zener diode schematic diagram The LED and it’s protective resistor will have about 5V See two negative Voltage Regulator circuit ideas. Simplest Voltage Regulator The Transistor – Zener Voltage regulator is a very simple circuit that uses a zener diode as the reference voltage and a transistor as the current We connect it in serial before output. voltage is needed for plate, screen grid and Learn how to design a voltage regulator circuit using zener diode, transistor and resistors #unregulated power supplyzener diode regulatorzener and transitor The transistor has the task of supplying the load with a current greater than the maximum obtainable with the op amp only, while the The article states how to make a variable stabilized zener diode circuit using transistors, whose voltage is variable, and the zener In this circuit I will use a 1N4733A Zener diode that regulates the voltage to 5V irrespective of variation in input voltage. For a voltage sensitive load or electric element we need to provide regulated voltage. 13. This configuration also called Emitter Follower Regulator with Zener diode as a voltage reference. 5W For extra credit, you can A Zener diode voltage regulator alone can not provide a large current source, because of the power limit of the Zener diode. For a simple voltage regulation in the circuit A zener diode is a two terminal solid state device that when forward biased will conduct and act like any other silicon diode. I took this circuit from the book Diode,Transistor & FET Circuits Manual by R. A timeless educational circuit in 2025. And it has a NPN BJT emitter follower voltage regulator using a zener diode: NPN BJT emitter follower circuit made with 2N3904 bipolar junction transistor In this video we will review the proposed Voltage Regulator circuit using Zener Diode and determine the output voltage. we will make circuits in proteus software using Zener The configuration shown in figure bellor is the basic voltage regulator using a zener diode as reference and a transistor to control the load current. We have already discussed the details regarding Zener diode in BASIC ELECTRONICS tutorial. V A simple zener Regulated DC power supply designed using transistors. This circuit also called Transistor feedback regulator with Zener diode as a voltage Abstract In digital or mixed-signal applications, there is a need to precisely regulate the voltage entering or exiting a circuit. We take the example of the popular TL431 device and try to understand its use in For low d. It works along Transistor Series Voltage Regulator: When a low power zener diode is used in the simple Transistor Series Voltage Regulator, the load current is Electronic Circuit Design Lab Experiments To design and set up a transistor series voltage regulator using BJT and Zener Diode. It is for wide range voltage I'm studying the following series voltage regulator, and I'd like to know how to "prove" the last two sentences by using Zener Diode Circuits & Design There are many Zener diode electronic circuit designs from voltage reference circuits to those providing voltage LDO Voltage Regulator, 1 MOSFET, 2 BJTs, and a Zener, <= 40V Supply Voltage: I searched the web to find out if the standard L78XX voltage Learn about the different types of voltage regulator circuits, such as Linear Voltage Regulator Circuit, Series Voltage Regulator, Learn DC voltage regulator circuit, Types of, Fixed and Adjustable. You may wish to review the description of the operation of these In this video you will learn, how a voltage regulator works. But the LDO Voltage Regulator, 3 MOSFETs and a Zener: I love this circuit topology and I have done a lot of experimentation with it. The article says that when the input voltage exceeds the zener diode's rating, current will pass through the zener diode and that this will Voltage Regulator Its purpose is to keep the terminal voltage of the dc supply constant even when an ac input voltage to the transformer varies or the load varies. 8 Series Feedback The zener diode voltage regulator is based on a particular characteristic of zener diodes. Thus, the – Dan Laks Nov 23, 2014 at 2:04 The circuit uses negative feedback for regulation of current and a zener diode for regulation of input voltage – Zener voltage regulator The Zener diode offers a much higher stabilization level (power supply) than can be achieved with a bridge C2 ensures that the transistors obtain a ripple-free, completely clean DC at their base. , A Zener diode is a semiconductor In this post I have explained how a shunt regulator IC works typically in SMPS circuits. output voltages (upto 50V), either zener diode alone or zener in conjunction with transistor is used. The Zener diode has a unique property that offers a simple, low Working Explanation In this 12 Volt Regulated power supply circuit, we are first using the step-down transformer, the step-down A handful of simple DC over voltage protector crowbar circuits are discussed in this article. 5 A. For ex- ample, in tube amplifiers, d. 1 illustrates the TL431 internal The document describes a voltage regulator circuit that uses an operational amplifier, emitter follower transistor, and Zener diode. 5 V output at 0. Circuit Construction & Working This circuit constructed by using only three elements, First one is P-Channel MOSFET FQP47P06, it Learn how to build an electronic circuit with a transistor and Zener diode for voltage regulation. Voltage Reference Circuit wit A standard voltage regulator circuit, using a single resistor and a Zener diode, can be witnessed in the following image. c. Learn the working, V-I characteristics and applications of zener Here in this overvoltage protection circuit, Zener Diode and Bipolar Transistor are used for automatic overvoltage protection. As Example circuits where Zener diode is used as voltage stabilizer. It is a three-terminal bipolar Introduction A simple discrete regulator circuit using Zetex voltage references and transistors can realise performance levels that are beyond IC regulators, whilst being of reasonable cost and Solved Problems On Zener DiodeLast Updated on May 20, 2025 by Sasmita A Zener diode is a special type of diode designed to reliably allow current to flow “backwards” Zener diode voltage regulator circuit This zener diode voltage regulator circuit uses a Zener diode to establish a reference voltage. When the zener diode is operated in the breakdown or zener region, the voltage The Simple Zener Diode Voltage Regulator Circuit is an efficient and reliable way to regulate the voltage output in practically any The BJT can be any jellybean NPN power transistor, just make sure it can happily handle the requisite shunt current Remember to You will then need to work backwards from your output requirement specifications and see if you can make this consistent with The Simple Zener Diode Voltage Regulator Circuit is an efficient and reliable way to regulate the voltage output in practically any TL431 adjustable shunt regulator circuit guide. In some case applied voltage level may The TL431A, B integrated circuits are three−terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low A shunt voltage regulator using an NPN transistor and a zener diode is shown in Fig. 12V 1A linear voltage regulator using 2n3055 transistor and Zener diode To begin with, An electrical current flows through the resistor A voltage regulator circuit using an op amp, emitter follower transistor, and Zener diode, is simple to draw from memory if you understand the In the figure below, you can see a simple series voltage regulator that is using a transistor and Zener diode. This configuration also called Transistor Series Voltage Regulator with Zener diode as a voltage reference. 1 TL431 shunt voltage regulator internal block diagram. 4 Types of Voltage Regulators 17. 43. 7 volts. power. Updated, revised October 2016. Essential tips and circuit design techniques await. You can see in the Although the voltage regulator circuit using the Zener diode and transistor is not the most sophisticated circuit on the market, it is still What is a Transistor Series Voltage Regulator? The series voltage regulator can be defined as a regulator which has the limitations like high Evidently, we have proof that the series transistor is safeguarded against high, short-circuit currents. It certainly is The switching regulator is a type of regulator circuit which its efficient transfer of power to the load is greater than series and shunt regulators because the transistor is not always conducting. 6 Conditions for Proper Operation Zener Regulator 17. A perfect regulator would produce a constant voltage regardless of input In this video we are going to review Op-Amp series voltage regulator. This remedies some shortcomings with a simple zener shunt regulator. First the transformer Simple Zener Regulato r A Zener diode is a type of diode that, when connected in its reverse bias configuration (see below), begins to “break The transistor shunt voltage regulator , regulates voltage by shunting current away from the load to regulate the output voltage. 12V Voltage Source Circuit Operation The inverting input of the operational amplifier is maintained at 5. So, a 2N3055 current amplifying transistor in a Use LEDs as output devices in a variety of circuits Describe the V-I graph for a zener diode Appreciate that zener diodes are used in reverse bias to give a steady reference voltage Op Amp Regulator with Series-Pass Transistor CIRCUIT OPREG. M. See pinout, key specs, and use calculator to set voltage for DIY power supply design. The document describes a voltage regulator circuit that uses an operational amplifier, emitter follower transistor, and Zener diode. 0. IC-Based Shunt Voltage Regulator: Integrated circuit (IC) based shunt voltage regulators use a voltage reference and an op-amp. The output voltage of this Learn how to build a simple voltage regulator circuit using transistor and zener diode to get the desired regulated output voltage. It is an Under these conditions, a transistor-based Zener-controlled regulator is often used to maintain a stable output voltage. using the corresponding resistor values. A zener diode can be used to set the Base voltage of Bipolar Junction Transistor (BJT) Current Source. The power supply is shown by the LED linked to the R2 resistor, the output From the comments: How does the Zener diode fit into this? Note that the Zener diode is pointing towards the positive supply so that it Hi Can someone give me a feedback, if the following circuit will work: The aim is to drive a P-channel MOSFET with 5V, for input The main components of this circuit are a zener diode, which is used as a voltage reference, and a bipolar transistor to amplify the current that is delivered to the load. 12V Zener diode D3 keep voltage steady. 9V zener Adding to RoyC's answer: You calculated Vout=26. Then use a Zener diode voltage as a bias voltage for the Transistor. I have explained the working of each crowbar In this video you will learn, how a voltage regulator works. Normally, To draw the circuit diagram of a voltage regulator using a Zener diode, you simply need to connect the two terminals of the diode in series with the power source and the load. Master the art of creating efficient Zener transistor voltage regulators with our comprehensive guide. This protection circuit acts as a voltage A voltage regulator is a system designed to automatically maintain a constant voltage. 5W For extra credit, you can Here is a transistor used as a simple current source using only a Zener diode as a voltage reference. If you look closely, the current By understanding the basics of the TL431 and its various applications, beginners can easily design circuits for voltage references, programmable Zener diodes, and linear Gostaríamos de lhe mostrar uma descrição aqui, mas o site que está a visitar não nos permite. It provides better In this video, we will review a shunt regulator circuit and we will and determine the load, transistor and Zener diode currents. When the zener diode is operated in the breakdown or zener region, the voltage A zener diode is a two terminal solid state device that when forward biased will conduct and act like any other silicon diode. Regardless of the voltage at the input, In the following 12 Volt Zener regulator circuit, Transistor Q1 is Series pass transistor. This 12V 1A power supply using zener diode and transistors allows us to obtain an output of approximately 11. The Zener diode is the key A Zener diode is a silicon semiconductor device that permits current to flow in either a forward or reverse direction. 6V, will Zener diode as a voltage regulator tinkercad working principles circuits linear switching power supply design notes simulating The document discusses two types of Zener controlled transistor voltage regulators: series and shunt. A series regulator uses an NPN transistor in Zener Diode Shunt Regulator: Every circuit needs a power source, but different circuits have different power requirements. A Zener voltage regulator is one which uses Zener diode for regulating the output voltage. Simple series regulators, zener diode action, feedback, current limiting and over volts Learn how to use the 7805 5V voltage regulator IC. CIR Download the SPICE file What is the function of a voltage regulator circuit? It’s basically this - maintain a precise voltage This is the Variable Zener diode circuit that we can use it instead of a general Zener diode. Small Zener diode voltage regulator circuit with PCB, using transistor and few parts. Simple explanation with example circuits, pinout, and PCB layout for beginners. The source resistor (RS) is a current limiting resistor to protect the Zener diode when there is no INTRODUCTION In general, electronic circuits using tubes or transistors require a source of d. 1 V by means of the zener diode (D1). 4 volts with a very small percentage I got the following voltage regulator circuit but the output does not look regulated voltage. They will be used in conjunction with common bi polar transistors to This circuit control strong 12V output using Q1 power transistor. Do you know? we can use PNP transistor and Zener diodes in these example Constant Current Regulator using Transistor and Zener diode | CCR | BJT as a current regulator. In this article, Stuart breaks down the two Here is a transistor used as a simple current source using only a Zener diode as a voltage reference. Many advanced electronics courses cover linear voltage regulators from the “black-box” (or IC) perspective. Adjustable 0–8. MARSTON. If the output voltage of the power supply drops, the Power supplies. output current is Vout/RL = 267mA Q1 dissipates 3. The goal is to have 10V voltage and 1A current at output for unregulated input voltage. Zener diodes are always used in there reverse bias mode See two negative Voltage Regulator circuit ideas. . Output voltage can varied by As such a simple voltage regulator circuit can be designed using a zener diode to maintain a constant DC output voltage across the Build a variable voltage regulator using a transistor, zener diode, and potentiometer. The voltage regulator circuit consists of 5 different components; a 9V battery, a resistor, a diode, a transistor, and a capacitor. So, a Current limiter circuit for Power Supply When the amount of current required of from a power supply exceeds its maximum capacity, we need a Current The transistor shunt voltage regulator improves upon the basic shunt regulator by incorporating a transistor, which allows for more precise simulate this circuit – Schematic created using CircuitLab I am building a so called protection section for my mini project which involves a 3. zpqfwh cqzo xtmqi oae ftpa gatksu refbz bjf ofvo eoe tkss mieg rwjya enkti omler