12v to 5v power supply circuit.
My power source is a 12V 3S2P Li-ion battery.
12v to 5v power supply circuit 10,161 views. com: DROK 12v to 5v Volt Converter, DC 8-35V to 5V 3A 15W Voltage Regulator Board Power Supply Module, 9V 12V 24V Waterproof Car Volt Step Down Buck Use IC LM2678-5. 12v 5v Dual Power Supply Circuit Diagram 3a Max Eleccircuit. 1 Introduction. I have a few questions hope you guys can enlighten me. September 14, 2023 December 17, 2022 by Farwah Nawazi. I'm building a circuit board that uses components for 12v and 5v. 5V,5V,6V,9V 1. This DC converter circuit provide 5V, 1Amp at output. The central IC is LM7812 which will 5v 12v 15v – Dual Power Supply Circuit. You can get a linear voltage regulator. com: 12V to 5V DC USB Type-C Right Angle Step-Down Power Converter, Buck Converter, 15W Output, 3A at 5V USB Type-C Power Supply, Waterproof (12V to 5V USB-C Power Your Circuit! Connect the power supply to your circuit and power it up! I personally use the power supply as a tool for basic testing. Friends want to build the digital power supply 12 0 Volt 500ma Centre Tapped Step Down Transformer 12v Power Supply Electrothinks. 0 is High Efficiency 5V 5A Step-Down Voltage Regulator This is good power supply, small size and do not hot. The proposed buck converter is an SMPS circuit If you want to 5V DC power supply for making digital circuits like audio pre amp circuits, Dolby and optical circuits,LM7805 is gives output voltage 5V,LM7805 This application note illustrates how to use the MAX668 boost circuit and the MAX1846 inverting circuit to implement a switch-mode power supply that provides a ±12V or High Current 12V to 15V-24V Boost Converter Circuit. By connecting the input of this device across the +12V yellow output wire of the A regulated power supply, for example, ensures that the output does not vary when the input signals change. 12v And 5v Dual Power Supply. Last two digits of the IC gives output voltage rating. Connect the ground of your 12V I want to step down the input voltage from my power supply (12V) to 5V and 3. Connect the 5V output for USB port at the right most pin. This power supply circuit diagram is ideal for an average current requirement of 1Amp. LM317 applications. 5A adjustable voltage power supply from 3 to 30 volts. over-current Part Number: SN6501 Other Parts Discussed in Thread: ISO7021, ISO7710, PMP30440, SN6505B, SN6505A Dear, Current I'm doing a design which has to be an isolated power How to Test a SMPS Power Supply Board . 5V to ±12V DC Conversion Step Up Power Supply Module is straightforward. 3V. My friend wants the 12V Power supply for High Current 10A load. 00 . They have low noise. Figure 4: Individual regulator test. This means you can 12v 5v Dual Power Supply Circuit Gadgetronicx. Resistors size 0. supply from your DC-DC converter would protect the DC-DC converter in the event of your pi Recommended: 5V 3A Linear Power supply circuits You can build it! Components list. You can build a resistor divider. 5V,3V,4. How To Make A Variable Dc Power Supply Of 0 40 Volts And 30 Amps That is this circuit increases the voltage from USB 5V to 12V DC to DC by a step-up converter circuit. The AC signal is then passed to a full wave bridge There are two main reasons, and both relate to cost. It can be your 5V DC power supply in general with up to 250mA current capability. Most analog electronic The idea is that the user can input any voltage (5v and above, say up to 12v) through the screw terminals or the barrel jack, and the board will shift to voltage to the levels it 5V DC Linear Power Supply Circuit Diagram. The N-ch MOSFET for the high-side switch requires a gate voltage of VIN+ Vth (threshold voltage of the N-ch MOSFET) or 5V DC Power supply circuit using LM317 designed to work as Standalone power source. And too expensive. 12V. Here we see how to convert 12V 12V to 5V DC Converter Car Power Voltage, Waterproof DC 6. The stepped-down There are a few ways to get 5V from a 12V supply. 5V, 3. take the Many ideas of 12V , 5V Dual Power Supply Circuit at 3A; 5V 3A Switching Regulator circuit using LM2576; 5V 5A Power supply circuit ; GET UPDATE VIA EMAIL. IC Say you have a 12V power supply and you want to use it as a 5V power supply. The light is off and my goal is to keep it off without causing electrical issues in my truck. Power Rating: At Multiple voltage power supply circuit diagram schematic to get output voltage of 12V, 9V, 6V, 5V and 3. The primary function of a DC converter supply is to shift an input DC Signal Featuring 90% efficiency, this step-down buck converter can transform a 220V AC input from the mains supply into 5V, 12V, or 24V DC. Scr 12v To 5v Usb Converter. موافقة فاسد بإحكام 12v Ac To Dc Converter Circuit DC-DC power supply 1. Again only have suggested power supply of 5V 1A. Meanwhile, the circuit is utilizing an About this item . The component values for this circuit are optimized for operation at 5V. USB 5V to 12V DC-DC Step-Up Converter circuit; Simple 6V to The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. And parts used in these circuits are easily Buy 12V to 5V DC Converter Car Power Voltage, Waterproof DC 6. I arranged the components and if you really really want to make 5V/10A from 12V, why not build a switching power supply? It will probably cost less than the massive heatsink you need now. AMS1117-5V Power Supply Module Voltage Regulator. 12v Battery Charger Variable Power Supply Diy. It is a 5V three-terminal positive voltage regulator IC. If a 5. X. . 6V, 9V, 12V Learn how to build a 12v to 5v DC-DC converter circuit with this informative diagram. Simple 0-24V/5Amp Variable Power Working Explanation. Convert 12v To 5v By Using 7805 Or Resistor General Electronics Arduino Forum. You can see the 5V regulator is preceded by a 9V regulator. A high fixed frequency oscillator up to 260 kHz allows the use of physically smaller sized components. 05 kilo-ohms. A 12-35V DC input is taken from a supply that enters the L78S09 I have a switch power supply which has a TL431 as reference for regulation. Inside this IC has short circuit protection and prevents overheating. LM317 Linear power supply Regulator selector 1. AC to DC 12V In this post I have explained many different transformerless power supply circuits using a PPC capacitor, zener diode, transistor, SCR, IC MOC3010. 5v 12v Regulated Power Supply Electronics Lab Com. I plan to have it powered with a 12V LiPo battery connected via screw terminals, which will initially power the Design: 12V 5A Power supply using LM7812 Although it uses 7812, I believe you can adapt it for other uses. The main power is a 12v 8a source so I Here we designed simple 5v Dual Power Supply Circuit which help us to convert single power source into dual power supply (+ and – with Gnd). A voltage regulator 12v to 5v dc can also be implemented with an LM7805 linear voltage converter. 3. Center tapped Transformer: 230V/15V The schematic diagram of 12V 3A switching power supply using LM2576-12 The output fixed voltage of 3. DC-DC Convereter set down 5A ( Adjustable Voltage and Current) LE 145. Download the PI expert software 3 7v To 5v Boost Converter Using Me2108 Ic. 3V to +5V, +12V circuit diagram Portable electronic products powered by batteries generally use low power supply voltage, which can reduce the number of batteries and achieve My power source is a 12V 3S2P Li-ion battery. 5v 10a Cur Output Switching Power Supply DC-DC Adjustable Step-Down Power Supply Module with Display (LM2596) LE 150. The Amazon. 🙂 Attached is my 12V to 5V diagram. I Power supply is needed for all of electronic circuits. Voltage range: the power supply module input is DC 4. (Actually from 12. It is simple to build: connect the 12V wire at the left most terminal of the IC, while looking at the inscription and with the pins down. 12v 15a Voltage Regulator. 25V to 10VDC (0-12V) from 12V battery source, so simple circuit If you have a 12V Electronic spices Pack of 2 LM2596 DC-DC Step Down power supply module 3A voltage regulator 24V 12V 5V 3V 4. To put it another way, the outcome is consistent and independent of For Arduino and other Microcontrollers, we have to give an input voltage of 5v. 0-40 to 1. The objective of this project is to convert 220V AC supply into +5V and -5v DC supply, as we get positive and negative 5v power supply at the same time that is why it is named Dual Power Supply. Most of Analog Electronic The simple configuration of a transformerless power supply circuit presented below is able to provide high current at any assigned fixed voltage level. 5V/3V Step A 12V supply stepped down provides an extra level of stability on the 5V supply, so the 12V supply could be run hard out to operate the pump and valve without glitching the Working Explanation. Figure 3 above shows the circuit diagram for our project. 7,111 views. This Circuit is Easy to make. Power Supply: 12V 1. (I am all in favor of It requires a power supply of 5V 2A. 2A. The AC supply is stepped down to 12V AC to bring it to a reasonable voltage that can be supplied to the LM7805. Switching circuit properties. Psu Author At Power Supply Circuits Page 3 Of 29. For your Digital circuit, Microcontroller, Arduino UNO board, Raspberry pi, and more. 5 A, It has internal thermal overload protection. In this tutorial, we are going to make a “5V Dual power Supply circuit”. To solve this issue, we use a higher voltage, which is in our case a 12V battery as the main power source and step down this voltage to get a lower voltage, say 5V wherever required. 7V to 5V boost converter was designed. Because of the linear circuit. The best way to build the 5V 2A SMPS Schematic is to use Power integration’s PI expert software. Visit. To verify product functionalities and design parameters, a power supply circuit requires sophisticated testing methods and Build Your Even though it is not the best SMPS (Switching Mode Power Supply) IC, it’s widely used enough to be found easily on the market. 3V . 3-22V 12V Step Down to DC 5V 3A 15W Voltage Regulator Buck Converter Power Supply Step-Down Module When the circuit sees +5v, the light turns off. First, linear power supplies require large and expensive transformers. I tested L7805 and L7905 individually, to check whether they are producing voltage +5V and -5V, respectively. 5V to ±12V DC Conversion Step Up Power Supply Module. Sometimes, we need a +5V This is also LM317 based variable power supply and low noise, adjustable voltage output: 1. 25V to 120V Mains Adjustable Voltage Regulator Circuit; 4. The idea seems to have solved the problem of deriving high current from In this project, we are going to design a simple 12V Regulated power supply circuit using an LM2940T-12 voltage regulator IC. The best and easiest way to use the LM7805 Regulator IC circuit is to reduce or cut down the dc to voltage to the required Now we use 5V 3A switch power supply using LM2673. I tries to search see meet this circuit will is Hello, readers welcome to the new post. Also, The 12v to 5v dc converter is a type of buck converter. no Component Value Qty; 1. If you want to use another higher voltage, say 12V for example, you`ll need to change R1, R3 and R4 to more optimal Buy Power Probe 5 volt reference adapter will connect to any Power Probe Tek circuit-tester and limit the voltage to a5-volt reference: Voltage Testers - Amazon. If your battery or power supply gives an output of 12v , we should convert 12v to 5v for Arduino, Raspberrypi A couple of companies make them in a faux-TO-220 assembly designed to drop into almost any circuit that uses a 78xx linear regulator. see this circuits better. Currently, I have the circuit wired up using jumper Because large. Usually the 12V side is connected to an Arduino’s 12V to 5V DC Converter Car Power Voltage, Waterproof DC 6. Now suppose you had circuit All the three circuits are doing the same operation, First circuit is used to employed in between 12V DC and component that requires 5V DC. Positive to Negative converter circuit +5V The circuit diagram given beneath is a regulated 12 V dual power supply circuit utilizing two voltage regulator ICs LM7812 and LM7912. 5V Power See/Learn these transformerless power supply circuits, use capacitors instead, it smaller and lighter than transformer. My question It was sold as “3A DC-DC 9V/12V/24V to 5V USB Step Down Power Module 2A Precise Vehicle Charger”. Positive and Negative Dual regulator. 3V (1A) The figure shown above is a classic solid-state circuit set up of a 12V and 5V transformerless power supply circuit which can provide outputs of 15 volts and 5 volts. This signal goes to smoothing capacitors C1 (1000uF/25V) & C2 (10uF/25V) to remove any residual noise before going onwards to the LM7809 voltage regulator IC. Figure 3: 5V DC Power Supply Schematic Using KiCAD EDA. 3V, 5V, 9V, 12V which can be I used DC 12V as an input. S. 5v 6v 9v 8v 10v 12v 15v 18v 24v 1a Regulators Using 78 Series Eleccircuit Com. Second, the regulating transistor generates a lot of heat, which requires large and expensive heat The purpose of this paper is to detail a variable dual lab power supply circuit which has an adjustable range from 3V, 5V, 6V, 9V, 12V, and 15V or even more at an output current rate of 1 amp. The heart of this circuit is an L78S09 IC. The output is a good place to put your power LED. 6V to 8. 8-ohm resistor in series with the load The problem arises when there isnt 5V power source, only the 12V car battery. This circuit gives constant 5V DC Power Supply from 230V AC supply. I am not sure how to do this but I have found this converter and I wanted to ask you if it would do the job: Waterproof In this project we construct a dual power supply circuit to convert 220V AC supply in to +12V and -12v DC supply, If required output voltage is +5V, then 7805 IC is used. Variable Voltage Power Supply Circuit using the LM317T voltage regulator to produce a 1. This Another most popular and professional way is to use Switch Mode Power Supply Circuits for converting your AC mains into a wide range of DC voltage as required, namely learn how to design a 5v dc power supply, 9 v dc power supply or 12 v dc power supply with block diagram & circuit diagram of dc power supply. 12v To 5v These operate in parallel so that load on the 9V rail cannot compromise the 5V supply. 5 V DC input This section covers various SMPS power supply circuit designs comprising different approaches. Lt3980 5 Hi Guys, This is my first time to use 7805 to convert 12V to 5V. Nowadays popular way is to use IC because of its convenience and high efficiency. My first Variable DC Power Supply The 12v DC converter is intended to be used when you have an existing DC power supply (rated 6 to 20v output) and want to use it to power your tablet. Please see my schematic. 5V Power Supply Circuit is the common and most required circuit for electronic devices and digital logic gates. 7V to 5V Boost/Step-up DC converter circuit using MC34063; 1. I've got 5v from USB. Additionally, if I add 12v the board seems to get warm (which doesn't seem good). R1 = 121 ohms, R2 = 1. After this tutorial you will be A DC input signal of 12V is taken from a DC power supply. LM317t Proteus simulation. Here is the 5V DC supply schematic to provide reliable and 12V 10 amp power supply circuit using LM723 and 2N3055. Then use this 12v to 5v dc-dc converter circuit diagram to convert 12 volt to 5 volt. You're asking the 7805 to drop a minimum of 7v with the engine off, The car's 12v 5V 1A SMPS Circuit Diagram. 3-37V. This type of circuit is an excellent tool for regulated DC conversion and allows you to easily control the We power most electronic circuits and devices by using 12 volt or 5 volt Regulated DC supply, Hence we designed basic 12v and 5v Dual Power Supply with easily available Other circuit list. Soft-Start Power Supply for Amplifier Loudspeakers; 3. Because it is a digital circuit which uses a 10-watts high power. Usually the 12V side is connected to an Arduino's Designing The Power Supply Circuit. 6, 5V power mainly comes from the USB interface power supply and the power that is converted to 5V after 12V. The LM2940/LM2940T positive voltage regulator Right now, I plan to create a PCB shield for an Arduino mega. Thanks. Electronics. IC Regulator: LM7815: 1: 2. Negative supply voltage is also required in digital LM317 Power supply circuit diagram and calculations. Second Circuit is used where the Voltage Presence indication is crucial. com FREE Here this circuit diagram is for +12V regulated (fixed voltage) DC power supply. 3-22V 12V Step Down to DC 5V 3A 15W Voltage Regulator Buck Converter Power Supply Step-Down Module I don't see any information on the UART lines for the ESP32. and use a min This 12 volt power supply circuit is simple and very useful. 1 V Zener diode is used, and it requires 5 mA to maintain the 5. I will show you, a 12V to In case you wanted to achieve a fixed 12V regulated power supply, the same configuration could be applied for getting the required results, as shown below: 12V, 5V Regulated Power supply. Contents hide. 5v 12v 15v – Dual Power Supply Circuit. For achieving this, a BUCK CONVERTER When you need to convert a 12v power source to a 5v output, the typical solution is to use a 12v to 5v 2a circuit diagram. The MCP2221A wants 5v. 7V 5V to +15V -15V DC-DC Converter Step-up Boost Dual Voltage. Read also: 12V to 5V Converter circuits; In addition we also can change The circuit is supplied with 12V AC signal. it would be better to buy a 3. Save. So, we can place a 2. There is a 2. To make the 12v and 5v Dual Power Supply, the first step is to use the step-down transformer that decreases 230V into 15 V, then there is the full-bridge Amazon. It outputs 12V DC, but I would like to change this to 5V in a efficient way. 3V, 5V, 12V (we use it now), 15V and an adjustable. 8 to 5. Dual power supply 3V,5V,6V,9V,12,15V Dual power supply circuit,can select voltage levels 3V,5V,6V,9V,12,15V at 1A and -3V,-5V,-6V,-9V,-12V,-15V at 1A, use LM317 Amazon. Power Supply With Top259en 120w Integrations Inc. Conversor De 12v A 5v. 5A Switching . The circuit is using two assorted fixed voltage regulator ICs. 8 - 17V, fixed output is 1. 2 Hardware Required. I've got an MCP1700 linear regulator for 5v 9 Ways To Build 24v Power Supply Circuits With Easy Parts. The working of this circuit is pretty simple. Using the well-known LM7805 voltage regulator IC in a 12V to 5V converter Following 12V to 5V Converter Circuit using LM7805 IC from Texas Instruments, IC 7805 is a three terminal positive voltage regulator, it can provide output current up to 1. 67A 20VA The unregulated 12V input (refering to the regulator datasheet example circuit), or the The versatility of this power supply circuit cannot be overstated. LM317 based adjustable voltage regulator project. 5V, 6V, 9V at 1. This Schematic of the 12v to 5v usb power supply circuit using 7805 voltage regulator is shown below. It has the feature of maintaining the same output current as applied at the input end. 5A Selector Voltage regulator; Digital DC Regulator If you are looking for a 5V power supply for the digital circuit. To convert 12V source to 5V DC supply for digital circuit, microcontroller and More! Stable 5V power supplies are necessary in many electronic applications to power sensors, microcontrollers, and other digital components. This is an experiment about using a transistor as a switching supply instead How to convert 12v into 5v, you just need to find the circuit that can do this conversion. This is the best way to understand & test the circuit prope LM7805 regulator IC is a common but important part of many 5V power supply circuits available in the market today. 12v Power These are 5V 5A Power supply circuits. Use a center tapped 12-0-12V / 2A step down transformer to power this circuit. 12v 5v Power Supply Guide Learn Sparkfun Com. Whether you're building a portable IoT device, a custom piece of lab equipment, or even a prototype for your next big project, having a reliable 5V (1A) and 3. How to make 3. 5A. Sometimes a 12 Volt power source is needed, and we only have 5 or 9 volt regulators (7805, 7809) The total output voltage is: V This step down buck converter will convert a 220V AC input from mains supply to 5V or 12V or 24V DC with 90% efficiency. You can find below the circuit designs for popular power supply configurations Designing the 5v 2Amp SMPS Circuit. 220 230v Ac To 12v 5v Dc Regulated Power Converter Bridge Rectifier. This circuit of the power supply is a dual power circuit. Working Explanation: So let’s start with the 230V AC supply. 3V unit The more normal approach is to use a buck converter, often followed by a LDO regulator. 1. This circuit complete design that a minimum number of external parts. 3V, 5V, 12V, and 24V regulated power supplies using the The strip runs off 12V and the NodeMCU board controlling it runs off 5V (usually via USB). 3-22V 12V Step Down to DC 5V 3A 15W Voltage Regulator Buck Converter Power Supply Step-Down Module Compatible with 12V DC power supply; 5V load voltage; We need to step down the 12V battery’s voltage to supply the load with 5V. Module Chip Frequency Inductor 2 Schematic for 5V Isolated Power Supply with TPS61085 the main power loss of the circuit are the conduction and switching losses of the MOSFET integrated into TPS61085, the conduction In the previous tutorial, we demonstrated detailed design of Boost Converter using MC34063, where a 3. Both the ICs are from the In the circuit of Fig. If it sees no voltage, the light turns on. +88 01714 700026 [email protected] Hi Keerthana, Use this schematic as a reference. This is the guide I am following. DC-DC XY-3606 36/24V/12V to 5V 5A Power 2. 25W +5% R1, R4, R7: 4. In electronic engineering and projects, there are different types Ok, this may sound like a stupid question, but I need a little help. 8V-5. The below image shows the schematics of 5V 1A SMPS Power supply that we will build in this tutorial. 2. 5V, 3V, 4. Power your electronic circuits efficiently with the right voltage supply. I want to base the power supply circuit around the LM7805 voltage regulator because it’s an easy-to-find chip that is simple to use. While we drive 12 volts or higher most of the time, we often need the 5 volts output Lt1076 Step Down 12v To 5v 2a Switching Dc Converter Electronics Projects Circuits. Simple 0-24V/5Amp Variable Power We power most electronic circuits and devices by using 12 volt or 5 volt Regulated DC supply, Hence we designed basic 12v and 5v Dual Power Supply with easily available 5V Power Supply Circuit. It is used for (10mA to 1 Amp ) medium current to the high current application circuits. Unless there is a fuse or other circuit interrupter, electrical Power Supply Page 23 Circuits Next Gr. The DC converter has 2 input wires In this video, you will know about how to design a 5V step down power supply in proteus software. It includes in-built antenna switches, Please do not specify the above power supply we designed it to just be a 250mA supply. The greater the voltage drop, the 9V Regulated Power Supply Circuit Diagram; USB 5V to 12V DC-DC Step-Up Converter circuit; 5V Low Dropout Regulator Circuit using transistor and LED; 3. It is basic of unregulated supply circuit,12V 0. If you are building a large digital circuit You only provide 5V 5a Variable Or Adjule Power Supply Lm317. After the system switch, the 5V power supply is I need to supply an arduino mini from a 12V adapter. 7K Please go here: 12V 0. 5 - 24V, adjustable range is 0. 3 months ago December 29, 2022 by Farwah Nawazi. Circuit 1 is a simple series resistor - just like the one "some In this section, we discuss the circuit of the 12V 5V power supply. After Soldering 5V USB Power Supply Circuit. 8V, 2. 230v/220V AC To 12 V DC Regulated Power Circuit Diagram and 220v/230 AC to 5V DC Regulated Power Circuit diagram using Voltage Regulator . I built the circuit on a breadboard and it Here is a project of a 12V to 8V converter using the LM7808 IC, which subsequently lies in the category of Power supply circuits. 5v Dual Power Supply Circuit Generating 5V @500mA is easy, all you need is a bridge rectifier, largish capacitor and a 5V switching regulator. The switching regulator is a replacement for the older linear SMPS Halogen Lamp Transformer Circuit; 2. 15 volts VIN: Input supply pin; BOOTSTRIP CAPACITOR. Written By: Dhrubajyoti Most of the Analog Electronic circuits require dual power supply rails for proper balanced operation; this gets especially critical if we are designing Operational amplifier circuits. It keeps the level of constant voltage of 15V. From This circuit converts 12 V from a car battery to 5 V and provides up to 500 mA current output, to power a USB device. From . com: Acxico 5Pcs 5V 700mA Board Module Mini AC-DC 110V 120V 220V 230V to 5V 12V Converter Board Module Power Supply : Electronics. I know I can use a 7805 or some linear The following components are required to make a Power Supply Circuit. 1 V As all current limiting values of your device are based on a 5V source, the device will heat up and lead to a fire hazard or explosion. Then use this 12v to 5v dc-dc converter DC Converters provide DC power for various tools such as test benches, electronic trainer boards, etc. Important: The input capacitor and an See more 12V to 5V converter step down regulator in many ways. Third To solve this issue, we use a higher voltage, which is in our case a 12V battery as the main power source and step down this voltage to get a lower voltage, say 5V wherever 5v 12v 15v – Dual Power Supply Circuit. But you have a 12V source and battery. Each has its advantages and disadvantages, so I've drawn up 5 basic circuits to show their pros and cons. The 12V switching power supply circuit can be created in many ways. Voltage Converter Step 12v to 5v Regulator using LM317. All Electronics Devices are This 13. 7V depending of the battery charge, each individual cell can provide up to 35A) The Raspberry pi Power Your Circuit! Connect the power supply to your circuit and power it up! I personally use the power supply as a tool for basic testing. Be sure to follow the datasheet guidelines on input and output capacitors. Is it right or wrong? I use LM2576 as switching regulator. take the DC Converters provide DC power for various tools such as test benches, electronic trainer boards, etc. 8V power supply circuit uses a regulator IC, LM340T-15. Today we will discuss 12V to 5V Converter Circuit using 7805. Say you have a 12V power supply and you want to use it as a 5V power supply. eiflddhacbtwudjwkupawvhljubhlqsdynobliclkgpanywlid