--- product_id: 235654439 title: "10 Pieces 5v Regulator Module Mini Voltage Reducer DC 4.5-24V 12V 24V to 5V 3A Volt Buck Converter Power Supply Transformer Module" brand: "weewooday" price: "88.67 DT" currency: TND in_stock: true reviews_count: 9 category: "Weewooday" url: https://www.desertcart.tn/products/235654439-10-pieces-5v-regulator-module-mini-voltage-reducer-dc-4 store_origin: TN region: Tunisia --- # 3A max output current Compact 20x11x5 mm size Adjustable 0.8-17V & fixed voltages 10 Pieces 5v Regulator Module Mini Voltage Reducer DC 4.5-24V 12V 24V to 5V 3A Volt Buck Converter Power Supply Transformer Module **Brand:** weewooday **Price:** 88.67 DT **Availability:** ✅ In Stock ## Summary > ⚡ Mini module, mega power — regulate your voltage like a pro! ## Quick Answers - **What is this?** 10 Pieces 5v Regulator Module Mini Voltage Reducer DC 4.5-24V 12V 24V to 5V 3A Volt Buck Converter Power Supply Transformer Module by weewooday - **How much does it cost?** 88.67 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/235654439-10-pieces-5v-regulator-module-mini-voltage-reducer-dc-4) ## Best For - weewooday enthusiasts ## Why This Product - Trusted weewooday brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact powerhouse:** Ultra-small footprint fits seamlessly into any project without sacrificing performance or efficiency. - • **Built for reliability:** High-quality components with short-circuit protection keep your projects safe and running smoothly. - • **Efficient energy saver:** 97.5% conversion efficiency means less heat, longer component life, and more power where you need it. - • **Plug & play flexibility:** Integrated enable port lets you control power effortlessly, perfect for smart automation and IoT setups. - • **Power up with precision:** Easily dial in your exact voltage from 0.8V to 17V or select fixed presets for flawless device compatibility. ## Overview This 10-pack of mini voltage regulator modules converts DC input voltages from 4.5V up to 24V down to a stable 5V output at up to 3A current. Featuring adjustable and fixed voltage outputs, high 97.5% efficiency, compact size (20x11x5 mm), and built-in short-circuit protection, these modules are ideal for powering and protecting your electronics projects with precision and reliability. ## Description 10 Pieces 5v regulator module mini voltage reducer DC 4.5 - 24V 12V 24V to 5V 3A volt buck converter power supply transformer moduleParameters: Input voltage: DC 4.5 - 24VOutput voltage: integrated adjustable and fixed output, and adjustable range is 0.8 - 17V, fixed output is 1.8V, 2.5V, 3.3V, 5V, 9V, 12V, able to be chosen on the back side. Output current: 3A max, please enhance cooling work when it is full load. When actual tested input 12V and output is 1.5A, no need to add other system. Enable function control: yes, low electric level will stop working when high electric level is working. High electric level is 2-5V, low electric level is 0V or so. Operating temperature: -40℃ - +85℃, industrial class, the higher the operation temperature is, and the smaller the output power is. Conversion efficiency: 97.5%, 6.5V to 5V, 0.7AFrequency: 500KHzOutput ripple: 20 mV, 12V to 5V, 3A, 20M widthOutput over-voltage protection: noTemperature rising range at full load: 40℃Static current: 0.85mAVoltage adjustment rate: -0.5%, 0.5%Dynamic response speed: 5% 200uSOutput short-circuit protection: yes, please don't keep making it short-circuit. Output reverse connection protection: noWiring method: solderingOutput method: soldering or pinsWelding hole spacing: 2.54 mmSize: 20 x 11 x 5 mmPackage includes: 10 x Mini 5v regulators Review: Awesome little buck converters - There are a few bad reviews on this item, but I have purchased this buck converter several times and I have been happy with every single one of them. Perhaps the documentation is insufficient or missing, but if you're buying one of them you probably at least THINK you know what you're doing, and when the negative reviewers connected it wrong and it short circuited, they decided to blame the device for their misuse. Connections: On one end of the chip there are 4 solder pads that are labeled VO+, GND, IN+, and EN. VO+ = the positive output pin (stepped down to whatever you select) IN+ = the positive input pin (acceptable range between 4.5V and 24V) GND = shared/common ground for your input and output (e.g. BOTH input and output negative grounds are connected to this one, single pin). EN = enable port (e.g. used to turn power on or off like a relay) Unless you plan to use a GPIO pin (Arduino, RPi, etc.) to signal the enable port (e.g. to turn power on/off), just ignore the EN pad. If you do want to power it on and off, connect a GPIO pin to the EN pin and set the GPIO to HIGH to STOP power flow through the chip and LOW to turn it ON. I typically don't use the EN port for my projects, but it's a nice feature. Note: If you wire the EN pin as a ground for your voltage in (which is likely what the bad reviewers did), it will short circuit. Don't do that and then complain that the chips are bad - they're not; you just wired it incorrectly. The EN port is NOT a ground. Voltage selection: The trickier part is voltage selection. Remember, this is ONLY a voltage reducer. If you feed it 4.5V, you can't get 12V out of it. Your desired output voltage must be LOWER than your input voltage. Also, BY DEFAULT, the potentiometer on the top of the chip is what is used to adjust the voltage. If you prefer to use the solder pads on the back to step down to a pre-defined voltage, you have to cut the connection on the ADJ jumper pad that is connected on the printed circuit board (the connection you need to cut is under the green shielding). Cutting this connection is probably the most difficult thing to do on the device. An X-Acto knife works well for it, but it takes some effort to cut all the way through the connection without cutting your finger (ask me how I know). For the sake of safety, I typically adjust the potentiometer using a power supply for my power input and a voltmeter to check the voltage output. Depending on the project, once I have everything soldered and adjusted, I typically use a piece of adhesive-filled heat shrink tubing to cover the entire chip. This will: 1. lock in the potentiometer setting and 2. seal everything up nicely to keep it waterproof. Review: DO NOT BUY THESE - I bought these despite some of the other reviews, hoping that even if I lost a couple to bad QC, the ones that worked would be fine. Wrong. From a usability standpoint, it's hard to tell where to cut the trace for the fixed voltage output. Very difficult to use for that reason alone, but of the batch I got, 60% smoked the IC immediately when applying power to them or tripped the OCP on my bench supply set to 200mA (so, dead shorted internally), regardless of voltage setting or input. The remainder shut down at anywhere from 14-18v input, far below the claimed 24v. Long story short, horrible design, and pure junk that doesn't work as advertised, even when it does at all. ## Features - Voltage range: the power supply module input is DC 4.5 - 12V, adjustable range is 0.8 - 17V, fixed output is 1.8V, 2.5V, 3.3V, 5V, 9V, 12V which can be chosen on the back; Output current is 3A max, please increase the cooling work at full load; If the actual test input is 12V and output is 1.5A, no other system is required - Adjustable and fixed voltage output: this buck converter allows you to get fixed output voltage by soldering the pot on the board, and you can adjust the fixed output voltage by potentiometer as you needed - Product performance: the voltage regulator module has high efficiency, ultra-compact size, high frequency, low ripple and stable working performance, widely applicable for fixing work: Synchronous rectification and the circuit conversion efficiency is as high as 97.5% - Reliable material: regulator module is made with quality potentiometer and 3A current chip, high current shielding inductor and MLCC solid capacitor with long service life; High current shielding inductance, ultra-low internal resistance, maximize conversion efficiency, reduce heat generation - Convenient to use: integrated enable port of the regulator board defaults to working mode and will be closed when it is at low electric level off, and with ultra-low quiescent current, quiescent current is 0.85 mA; It can be connected to the car battery without a switch, cigarette lighter cord or the ACC power cord ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08JZ5FVLC | | Additional Features | Short Circuit Protection | | Amperage | 3 Amps | | Best Sellers Rank | #98,571 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #364 in Power Converters | | Brand | Weewooday | | Built-In Media | 10 x Mini 5v regulators | | Color | red | | Compatible Devices | [INFERRED] Devices with a 5V input requirement | | Compatible Phone Models | [INFERRED] Devices with a 5V input requirement | | Connectivity Technology | Proprietary Connector | | Connector Type | Proprietary | | Current Rating | 3 Amps | | Customer Package Type | FFP | | Customer Reviews | 3.0 out of 5 stars 251 Reviews | | Enclosure Material | Electronic components and materials | | Frequency Range | 500 KHz, NO | | Included Components | 10 x Mini 5v regulators | | Input Voltage | 24 Volts | | Item Weight | 22.68 g | | Main Power Connector Type | 2 Pin | | Manufacturer | Weewooday | | Mfr Part Number | Weewooday-820 | | Model Number | Weewooday-820 | | Mounting Type | Board Mount | | Number of Items | 10 | | Number of Power Levels | 6 | | Output Current | 3 Amps | | Output Voltage | 5 Volts | | Portable | Yes | | Power Plug | No Plug | | Power Source | Battery Powered, Corded Electric | | Special Feature | Short Circuit Protection | | Specification Met | CE | | Unit Count | 1.0 Count | | Wattage | 693 watts | ## Product Details - **Brand:** Weewooday - **Connectivity Technology:** Proprietary Connector - **Compatible Devices:** [INFERRED] Devices with a 5V input requirement - **Compatible Phone Models:** [INFERRED] Devices with a 5V input requirement - **Included Components:** 10 x Mini 5v regulators - **Input Voltage:** 24 Volts - **Amperage:** 3 Amps - **Wattage:** 693 watts - **Number of Items:** 10 - **Output Current:** 3 Amps ## Images ![10 Pieces 5v Regulator Module Mini Voltage Reducer DC 4.5-24V 12V 24V to 5V 3A Volt Buck Converter Power Supply Transformer Module - Image 1](https://m.media-amazon.com/images/I/81-o31NYgCL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Awesome little buck converters *by D***D on July 14, 2022* There are a few bad reviews on this item, but I have purchased this buck converter several times and I have been happy with every single one of them. Perhaps the documentation is insufficient or missing, but if you're buying one of them you probably at least THINK you know what you're doing, and when the negative reviewers connected it wrong and it short circuited, they decided to blame the device for their misuse. Connections: On one end of the chip there are 4 solder pads that are labeled VO+, GND, IN+, and EN. VO+ = the positive output pin (stepped down to whatever you select) IN+ = the positive input pin (acceptable range between 4.5V and 24V) GND = shared/common ground for your input and output (e.g. BOTH input and output negative grounds are connected to this one, single pin). EN = enable port (e.g. used to turn power on or off like a relay) Unless you plan to use a GPIO pin (Arduino, RPi, etc.) to signal the enable port (e.g. to turn power on/off), just ignore the EN pad. If you do want to power it on and off, connect a GPIO pin to the EN pin and set the GPIO to HIGH to STOP power flow through the chip and LOW to turn it ON. I typically don't use the EN port for my projects, but it's a nice feature. Note: If you wire the EN pin as a ground for your voltage in (which is likely what the bad reviewers did), it will short circuit. Don't do that and then complain that the chips are bad - they're not; you just wired it incorrectly. The EN port is NOT a ground. Voltage selection: The trickier part is voltage selection. Remember, this is ONLY a voltage reducer. If you feed it 4.5V, you can't get 12V out of it. Your desired output voltage must be LOWER than your input voltage. Also, BY DEFAULT, the potentiometer on the top of the chip is what is used to adjust the voltage. If you prefer to use the solder pads on the back to step down to a pre-defined voltage, you have to cut the connection on the ADJ jumper pad that is connected on the printed circuit board (the connection you need to cut is under the green shielding). Cutting this connection is probably the most difficult thing to do on the device. An X-Acto knife works well for it, but it takes some effort to cut all the way through the connection without cutting your finger (ask me how I know). For the sake of safety, I typically adjust the potentiometer using a power supply for my power input and a voltmeter to check the voltage output. Depending on the project, once I have everything soldered and adjusted, I typically use a piece of adhesive-filled heat shrink tubing to cover the entire chip. This will: 1. lock in the potentiometer setting and 2. seal everything up nicely to keep it waterproof. ### ⭐ DO NOT BUY THESE *by A***N on June 13, 2025* I bought these despite some of the other reviews, hoping that even if I lost a couple to bad QC, the ones that worked would be fine. Wrong. From a usability standpoint, it's hard to tell where to cut the trace for the fixed voltage output. Very difficult to use for that reason alone, but of the batch I got, 60% smoked the IC immediately when applying power to them or tripped the OCP on my bench supply set to 200mA (so, dead shorted internally), regardless of voltage setting or input. The remainder shut down at anywhere from 14-18v input, far below the claimed 24v. Long story short, horrible design, and pure junk that doesn't work as advertised, even when it does at all. ### ⭐⭐⭐⭐⭐ Works great, remember to cut the little strip by the ADJ pad. *by A***K on May 29, 2021* Seems like a few of the people who have issues with this haven't figured out what the "cut the line in the red frame" mean. The top pad, where it says ADJ, if you look really really closely, has a very thin strip connecting the pad. If you leave that, the other pads won't give the correct voltage, and it will only work with the ADJ wheel. Just take a razer, or any thing sharp and pointy, and cut that little line, and it will suddenly start giving you the right voltage. I find these super compact, and really easy to put into any project that needs a constant flow of power at a set voltage. So I can send 3.3V to my ESP8266 board, and 12 volts to my relays, all with one power source. ## Frequently Bought Together - 10 Pieces 5v Regulator Module Mini Voltage Reducer DC 4.5-24V 12V 24V to 5V 3A Volt Buck Converter Power Supply Transformer Module - 5Pcs TMC2208 3D Printer Stepper Motor Driver, DORHEA TMC2208 V1.2 Stepper Driver Module with Heat Sink Screwdriver for 3D Printer Controller Mother Boards Reprap Ramps1.4 MKS Prusa i3 Ender-3 Pro - E-Projects - Radial Electrolytic Capacitor, 100uF, 35V, 105 C (Pack of 5) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/235654439-10-pieces-5v-regulator-module-mini-voltage-reducer-dc-4](https://www.desertcart.tn/products/235654439-10-pieces-5v-regulator-module-mini-voltage-reducer-dc-4) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-02*