# LM2596 in Action: Case Study of Its Application in Power Supply Units Learn what the LM2596 is and explore its buck converter circuit diagram, external components, voltage range, and practical power supply design tips. Written by [Jharwin Barrozo](https://flux.seobdtools.com/jharwinbarrozo) Published Oct 2026 - 5 min read [![Typical schematic diagram of LM2596 buck converter or step-down converter with its various external components like capacitors, zener diode, and inductor](https://flux.seobdtools.com/p/assets/blogs/lm2596/main.webp)](#) ## When it comes to reliable voltage regulation, the LM2596 DC-DC converter stands as a trusted choice among electrical engineers and hobbyists. This chip plays a vital role in buck converter topology and power supply design. ### What is LM2596 The LM2596 is essentially a voltage regulator designed as a buck converter. It can handle input voltages up to 40V, efficiently stepping them down to produce a lower, stable output voltage (Vout) that can be as low as 1.23V or as high as 35V. Thanks to its BJT technology, the converter can achieve excellent regulation performance. ### What's inside a LM2596? The LM2596 is an integrated circuit (IC) designed to function as a voltage regulator in a buck converter topology. While you won't be able to see the internal components just by looking at the chip, its [datasheet](https://www.ti.com/lit/ds/symlink/lm2596.pdf) will reveal a variety of built-in features that facilitate voltage conversion and regulation. Here's a general breakdown of what's inside: ‍ ![](https://flux.seobdtools.com/p/assets/blog-content/65081dc22b33ac9a3fb36d4e_LM2596-inside-circuit.webp) #### Internal Switching Transistor (BJT) The LM2596 typically incorporates an internal bipolar (NPN) power transistor that acts as the switching element. This transistor allows the LM2596 to switch current paths, thereby stepping down the voltage. #### Control Logic The internal control logic manages the timing and switching operations. It usually operates at a fixed frequency and is responsible for the opening and closing of the internal transistor. #### Feedback Loop and Error Amplifier The LM2596 includes a feedback loop that measures the output voltage (Vout) and compares it to a reference voltage. Any deviation results in an error signal, which is amplified and used to adjust the duty cycle of the switching transistor to keep the output voltage stable. #### Voltage Reference An internal voltage reference sets the standard against which the output voltage is compared. This is essential for the regulation process. #### Protection Circuits The LM2596 includes built-in thermal shutdown and current limiting to protect the IC and connected components from damage. ### External Components: Beyond the IC Although the LM2596 itself is an integrated package, its effectiveness in a buck converter circuit relies on external components like inductors, capacitors, and sometimes diodes and resistors. The IC has pins to connect these components. | External Components | Purpose | | --- | --- | | Inductor | The inductor plays an essential role in the buck topology, as it smoothens out the pulsating DC voltage. Usually, inductors rated at 3A or more are ideal for high-performance power supply applications. | | Capacitor | Capacitors serve to filter the voltage and reduce ripple. Both electrolytic and ceramic capacitors find their place here, with 220uF electrolytic capacitors often recommended for a stable performance. | | Diode | Schottky diodes are commonly used in LM2596 circuits for their low forward voltage drop and fast switching capabilities. | | FET | The LM2596 incorporates FET (Field-Effect Transistor) technology for efficient switching operations. | | Resistor | A pair of resistors are typically used in an adjustable voltage version to set the desired Vout. That feedback pair is a [voltage divider](https://flux.seobdtools.com/p/tools/voltage-divider-calculator), so you can size it with a divider calculator, and confirm the bands on the parts you fit with a [resistor color code calculator](https://flux.seobdtools.com/p/tools/resistor-color-code-calculator). | ### Voltage Inputs and Outputs The LM2596 can handle a wide range of input voltages. Whether it's a 40V input from a power converter or as low as 4.5V, the LM2596 ensures a reliable output. ### LM2596 Specifications | Specifications | Features and Ratings | | --- | --- | | Output Load Current | 3 A | | Input Voltage Range | Up to 40 V | | Power on standby mode | typically 80 μA | | Internal Oscillating Freq | 150 kHz | | Protection | Thermal shutdown and current-limit protected | ### Vin and Vout Vin is the input voltage fed into the circuit, while Vout is the output voltage regulated by the LM2596. This makes it extremely versatile, catering to both high and low voltage requirements. ### The Power Supply Scenario Power supply units often incorporate this DC-DC converter for its non-synchronous regulation capabilities. The LM2596 is capable of driving up to 3A in specific conditions, which is quite sufficient for many types of electrical loads. ### Additional Components and Parameters #### 25V, 30V, and 35V Capacitors Different voltage ratings like 25V, 30V, and 35V for electrolytic capacitors are often employed based on the desired output and input voltage ranges. #### Ripple Factor Voltage ripple is an essential factor to consider, and the LM2596 excels in maintaining a low ripple, thereby ensuring a stable output. ![Before and after ripple filter for LM2596](https://flux.seobdtools.com/p/assets/blog-content/65082c5f2108f0813199840a_ripple.webp) Different inductor types or core materials produce different amounts of this characteristic ringing or ripple. Ferrite core inductors have very little core loss and therefore produce the most ringing. The higher core loss of powdered iron inductors produce less ringing. If desired, a series RC can be placed in parallel with the inductor to dampen the ringing. #### Frequency and Switching The LM2596 operates at a fixed frequency, aiding in easier filter design. The chip incorporates internal switching transistors, further simplifying the circuit topology. #### Documentation and Design [Datasheets](https://www.ti.com/lit/ds/symlink/lm2596.pdf) and Webench tools are useful resources for understanding the LM2596 circuit's pinout and diagram. Datasheets provide detailed specifications, while Webench helps in simulation and layout design for your PCB. ### Advanced Usages Requirements #### MOSFETs For higher power than the LM2596 can deliver, designers move to a buck controller that drives external MOSFETs. #### Example LM2596 Buck Converter Module ![](https://flux.seobdtools.com/p/assets/blog-content/6508242667e5e300c6daf609_adjustable-buck-converter-LM2596%20copy.webp) An example adjustable buck converter module based on LM2596. [Learn more](https://flux.seobdtools.com/jecstronic/bec-arduino-lm2596-sublayout?editor=pcb_3d) ### In Summary The LM2596 is a versatile and robust DC-DC converter, central to many power supply systems and voltage regulator applications. Its excellent performance, including a broad voltage range of up to 40V and low ripple, make it a preferred choice. Whether you're focusing on inductor specifications, capacitor types, diode characteristics, or transistor functionalities, this IC has proven itself as an efficient voltage regulator in asynchronous settings. ### Practical Tips Before diving into your project, make sure to refer to [datasheets](https://www.ti.com/lit/ds/symlink/lm2596.pdf) for the most accurate information. Diagrams are your best friend when laying out your PCB. Remember, you can use the LM2596 in adjustable setups by modifying the resistor values to achieve custom voltage outputs. LM2596 offers a reliable and efficient solution for all your voltage regulation needs, serving as the cornerstone in many buck converter and power converter applications. ## About the author [Jharwin Barrozo](https://flux.seobdtools.com/jharwinbarrozo) Electronics Engineer at Flux Jharwin is an electronics engineer mainly focused on satellites. He built his own ground station using Flux to monitor RF activities on the International Space Station. Find him on Flux [@jharwinbarrozo](https://flux.ai/jharwinbarrozo) Let’s start building Build your big idea together with Flux. All you need to do is describe what you want to make, or what problem you want to solve. 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stitching vias and power planes, without any components.](https://flux.seobdtools.com/p/assets/blogs/gnd-fills-power-planes/main.webp) ### Guide to GND Fills and Power Planes 6 Min Read](https://flux.seobdtools.com/p/blog/guide-to-gnd-fills-and-power-planes)[ ![Illustration for Power Distribution Network (PDN) Design in PCBs](https://flux.seobdtools.com/p/assets/blogs/pdn-design-pcb/main.webp) ### Power Distribution Network (PDN) Design in PCBs 10 Min Read](https://flux.seobdtools.com/p/blog/pdn-design-pcb)[ ![A detailed illustration of PCB grounding techniques showing ground planes, return paths, and noise reduction strategies](https://flux.seobdtools.com/p/assets/blogs/pcb-grounding-techniques/main.webp) ### PCB Grounding Techniques for Noise Reduction and Stability 11 Min Read](https://flux.seobdtools.com/p/blog/pcb-grounding-techniques)[ ![A detailed illustration of high-current PCB design showing trace sizing, thermal management, and power layout strategies](https://flux.seobdtools.com/p/assets/blogs/high-current-pcb-design/main.webp) ### Designing High-Current PCBs: Layout and Safety Considerations 8 Min Read](https://flux.seobdtools.com/p/blog/high-current-pcb-design)[ ![An illustration showing PCB trace resistance calculation concepts with copper traces and measurement tools](https://flux.seobdtools.com/p/assets/blogs/how-to-calculate-pcb-trace-resistance/main.webp) ### How to Calculate PCB Trace Resistance 6 Min Read](https://flux.seobdtools.com/p/blog/how-to-calculate-pcb-trace-resistance)[ ![A focused electrician wearing safety gear is carefully inspecting or repairing an electrical box with wires attached to it. He wears a yellow hard hat, safety glasses, ear protection, and gloves, highlighting the importance of personal protective equipment when working with electrical systems. The meticulous examination of the electrical connections signifies the critical nature of ensuring proper voltage levels and avoiding voltage drop, which can lead to reduced efficiency and potential damage to electrical components.](https://flux.seobdtools.com/p/assets/blogs/voltage-drop/main.webp) ### Voltage Drop Calculations: Formulas, Factors, and Guidelines 5 Min Read](https://flux.seobdtools.com/p/blog/importance-of-voltage-drop-calculations)[ ![An array of AC to DC converter circuit boards featuring components like transformers, bridge rectifiers, and capacitors to facilitate the conversion of alternating current to direct current.](https://flux.seobdtools.com/p/assets/blogs/ac-to-dc-converters/main.webp) ### AC to DC Converter: The Backbone of Power Electronics 4 Min Read](https://flux.seobdtools.com/p/blog/ac-to-dc-converter-the-backbone-of-power-electronics)[ ![AC-to-DC Converters: How They Work, Types, and Design Tips](https://flux.seobdtools.com/p/assets/blogs/hatter/ac-dc-converter/main.webp) ### AC-to-DC Converters: How They Work, Types, and Design Tips 5 Min Read](https://flux.seobdtools.com/p/blog/what-is-an-ac-to-dc-converter-technical-basics-explained)[ ![Illustration for Thermal Management in PCB Design: Methods and Best Practices](https://flux.seobdtools.com/p/assets/blogs/pcb-thermal-management/main.webp) ### Thermal Management in PCB Design: Methods and Best Practices 10 Min Read](https://flux.seobdtools.com/p/blog/pcb-thermal-management)[ ![PCB Thermal Management: Analysis and Design Best Practices](https://flux.seobdtools.com/p/assets/blogs/pcb-thermal-analysis/main.webp) ### PCB Thermal Management: Analysis and Design Best Practices 6 Min Read](https://flux.seobdtools.com/p/blog/achieving-efficient-heat-flow-pcb-thermal-management-best-practices)[ ![Illustration of a PPS chip symbolically powering three fast charging technologies—PPS, Power Delivery (PD), and Quick Charge (QC)—on a dark background.](https://flux.seobdtools.com/p/assets/blogs/programmable-power-supply/main.webp) ### Understanding PPS Fast Charging: What It Is and How It Works 3 Min Read](https://flux.seobdtools.com/p/blog/understanding-pps-fast-charging-what-it-is-and-how-it-works)[ ![Illustration for Decoupling Capacitors in PCB Design: Placement and Selection](https://flux.seobdtools.com/p/assets/blogs/decoupling-capacitors-pcb/main.webp) ### Decoupling Capacitors in PCB Design: Placement and Selection 9 Min Read](https://flux.seobdtools.com/p/blog/decoupling-capacitors-pcb)[ ![The image presents a graphical representation of Multilayer Ceramic Capacitors (MLCCs). On the left side of the image, there is a three-dimensional illustration of a capacitor, with a beige body and alternating white and golden layers, representing the ceramic and metal layers of the capacitor. An arrow points from this illustration to the right side of the image, where there is a cutaway view of a similar capacitor, showing multiple golden conducting layers separated by white ceramic layers, which illustrate the internal structure of the capacitor. The background is dark green, and above the illustrations, in large white and green text, the acronym "MLCCs" is spelled out, followed by the full term "MULTILAYER CERAMIC CAPACITORS" in smaller capital letters.](https://flux.seobdtools.com/p/assets/blogs/multilayer-ceramic-capacitors/main.webp) ### What Is a Multilayer Ceramic Capacitor (MLCC)? 5 Min Read](https://flux.seobdtools.com/p/blog/what-is-a-multilayer-ceramic-capacitor-key-features-and-applications)[ ![Cutaway diagram of a tantalum capacitor showing anode, dielectric, cathode layers, epoxy case, and leads](https://flux.seobdtools.com/p/assets/blogs/tantalum-capacitor/main.webp) ### Tantalum Capacitors Guide: Polarity, Derating & Risks 7 Min Read](https://flux.seobdtools.com/p/blog/tantalum-capacitor)[ ![A big text Amps vs Volts with their corresponding symbols (I and V) as background](https://flux.seobdtools.com/p/assets/blogs/amps-vs-volts/main.webp) ### Amps vs. Volts: Key Differences and How They Work Together 4 Min Read](https://flux.seobdtools.com/p/blog/amps-vs-volts-understanding-the-key-differences)[ ![Shunt resistor, Hall-effect, and current transformer current sensors compared.](https://flux.seobdtools.com/p/assets/blogs/current-sensor-types/main.webp) ### Current Sensor Types: Shunt, Hall Effect, and Current Transformer Comparison 12 Min Read](https://flux.seobdtools.com/p/blog/current-sensor-types)[ ![Cylindrical and pouch battery cells beside a battery-management circuit board.](https://flux.seobdtools.com/p/assets/blogs/li-ion-vs-lipo-vs-lifepo4-vs-nimh/main.webp) ### Li-ion vs LiPo vs LiFePO4 vs NiMH for Hardware Design 16 Min Read](https://flux.seobdtools.com/p/blog/li-ion-vs-lipo-vs-lifepo4-vs-nimh)[ ![Never Worry About Stackups Again: Introducing the Stackup Editor](https://flux.seobdtools.com/p/assets/blogs/stackup_editor/main.webp) ### Never Worry About Stackups Again: Introducing the Stackup Editor 3 Min Read](https://flux.seobdtools.com/p/blog/never-worry-about-stackups-again-introducing-the-stackup-editor)[ ![Flux Stackup Editor showing a Standard 4-Layer PCB stackup with Top Copper, Mid-Layer 1, Mid-Layer 2, and Bottom Copper signal layers separated by Prepreg and Core dielectric materials, with layer thicknesses and dielectric constants configured for impedance-controlled PCB design.](https://flux.seobdtools.com/p/assets/blogs/multilayer-pcb-design/main.webp) ### Multilayer PCB Design: Stackup and Routing Best Practices 8 Min Read](https://flux.seobdtools.com/p/blog/multilayer-pcb-design-best-practices)[ ![An illustrated guide to PCB materials comparing FR4 and advanced substrates for high-performance circuit board design](https://flux.seobdtools.com/p/assets/blogs/pcb-materials-guide/main.webp) ### How to Choose PCB Materials: FR4 vs Advanced Substrates 7 Min Read](https://flux.seobdtools.com/p/blog/pcb-materials-guide)[ ![A detailed illustration showing the cross-section of a multilayer PCB with different via types including through-hole, blind, buried, and microvias](https://flux.seobdtools.com/p/assets/blogs/pcb-via-types-guide/main.webp) ### Blind Vias, Buried Vias, and Microvias: A Complete Guide to PCB Via Types 12 Min Read](https://flux.seobdtools.com/p/blog/pcb-via-types-guide)[ ![A 2d view and layout of a pcb board design showing different type of vias](https://flux.seobdtools.com/p/assets/blogs/different-type-vias/main.webp) ### Exploring Different Types of Vias in PCB 2 Min Read](https://flux.seobdtools.com/p/blog/exploring-different-types-of-pcb-vias)[ ![A complex PCB board with high-density interconnect (HDI) technology, featuring advanced routing on each of its copper layers.](https://flux.seobdtools.com/p/assets/blogs/smart-micro-vias-blind-buried-vias/main.webp) ### High-Density PCBs just got easier with Smart Vias 4 Min Read](https://flux.seobdtools.com/p/blog/high-density-pcbs-just-got-easier-with-smart-vias)[ ![A detailed illustration of a multilayer PCB cross-section showing via stitching connecting ground planes across layers](https://flux.seobdtools.com/p/assets/blogs/via-stitching-pcb-guide/main.webp) ### How to Use Via Stitching in PCB Design 11 Min Read](https://flux.seobdtools.com/p/blog/via-stitching-pcb-guide)[ ![An illustration of PCB design constraints showing electrical, mechanical, and manufacturing rules](https://flux.seobdtools.com/p/assets/blogs/pcb-design-constraints/main.webp) ### PCB Design Constraints: What Engineers Need to Know 7 Min Read](https://flux.seobdtools.com/p/blog/pcb-design-constraints)[ ![PCB constraint management showing how engineers control layout rules for routing, spacing, and impedance](https://flux.seobdtools.com/p/assets/blogs/pcb-constraint-management/main.webp) ### PCB Constraint Management: How Engineers Control Layout Rules 6 Min Read](https://flux.seobdtools.com/p/blog/pcb-constraint-management)[ ![Design Rule Checking (DRC) in PCB Design: Real-Time vs Batch, Rules, and Common Failures](https://flux.seobdtools.com/p/assets/blogs/pcb-drc/main.webp) ### Design Rule Checking (DRC) in PCB Design: Real-Time vs Batch, Rules, and Common Failures 8 Min Read](https://flux.seobdtools.com/p/blog/pcb-design-rule-checking-drc)[ ![ERC vs DRC in PCB design showing the difference between electrical rule checks and design rule checks](https://flux.seobdtools.com/p/assets/blogs/erc-vs-drc/main.webp) ### Electrical Rule Check (ERC) vs DRC in PCB Design 7 Min Read](https://flux.seobdtools.com/p/blog/erc-vs-drc)[ ![A guide to PCB design reviews covering schematic, layout, and DFM checks for catching errors early](https://flux.seobdtools.com/p/assets/blogs/pcb-design-review-process/main.webp) ### PCB Design Reviews: Best Practices for Catching Errors Early 6 Min Read](https://flux.seobdtools.com/p/blog/pcb-design-review-process)[ ![Common PCB Design Mistakes and How to Avoid Them](https://flux.seobdtools.com/p/assets/blogs/pcb-design-mistakes/main.webp) ### Common PCB Design Mistakes and How to Avoid Them 31 Min Read](https://flux.seobdtools.com/p/blog/pcb-design-mistakes)[ ![Image showing a stack of printed circuit boards (PCBs) with a large white 'X' over them, highlighting '5 Common Mistakes in PCB Design.' The background features intricate PCB traces in red and blue on a dark surface, with a purple gradient highlighting the title. The image emphasizes errors commonly made in PCB design, such as layout, signal integrity, and component placement.](https://flux.seobdtools.com/p/assets/blogs/5-common-mistakes-in-pcb-design/main.webp) ### 5 Common PCB Design Mistakes and How to Avoid Them 7 Min Read](https://flux.seobdtools.com/p/blog/5-pcb-design-mistakes-that-could-ruin-your-board)[ ![A guide to PCB silkscreen design covering labeling, readability, and common manufacturing mistakes](https://flux.seobdtools.com/p/assets/blogs/pcb-silkscreen-design/main.webp) ### PCB Silkscreen Design: Guidelines and Common Mistakes 7 Min Read](https://flux.seobdtools.com/p/blog/pcb-silkscreen-design)[ ![Advanced complex PCB boards using Flux's Smart Polygons](https://flux.seobdtools.com/p/assets/blogs/smart-polygons/main.webp) ### Smart Polygons: Advanced PCB Design Just Got Easier 4 Min Read](https://flux.seobdtools.com/p/blog/smart-polygons-advanced-pcb-design-just-got-easier)[ ![A complex printed circuit board with lots of electronic components. A 3D render of the PCB on Flux.](https://flux.seobdtools.com/p/assets/blogs/new-3d-render/main.webp) ### Automatically Create Photorealistic PCB Renders 3 Min Read](https://flux.seobdtools.com/p/blog/automatically-create-photorealistic-pcb-renders)[ ![A tool on Flux to measure the distance between two pads in PCB editor with a text mm to mil conversion.](https://flux.seobdtools.com/p/assets/blogs/mm-to-mil/main.webp) ### How to Convert from MM to Mils: a Guide for Beginners 4 Min Read](https://flux.seobdtools.com/p/blog/how-to-convert-from-mm-to-mils-a-guide-for-beginners)[ ![Illustration of a printed circuit board showing solder mask over copper traces and exposed pads.](https://flux.seobdtools.com/p/assets/blogs/what-is-solder-mask/main.webp) ### What Is Solder Mask? Materials, Colors, and PCB Design Rules 6 Min Read](https://flux.seobdtools.com/p/blog/what-is-solder-mask)[ ![Designing Custom PCB Outlines: Fixing DXF and SVG Import Failures](https://flux.seobdtools.com/p/assets/blogs/import-dxf-board-outline-error/main.webp) ### Designing Custom PCB Outlines: Fixing DXF and SVG Import Failures 6 Min Read](https://flux.seobdtools.com/p/blog/import-dxf-board-outline-error)[ ![PCB Enclosure Design: How to Design an Enclosure](https://flux.seobdtools.com/p/assets/blogs/pcb-enclosure-design/main.webp) ### PCB Enclosure Design: How to Design an Enclosure 13 Min Read](https://flux.seobdtools.com/p/blog/pcb-enclosure-design)[ ![Teal isometric line illustration of a PCB above an L-shaped sheet-metal bracket with mounting holes](https://flux.seobdtools.com/p/assets/blogs/sheet-metal-bracket-from-prompt/main.webp) ### How to design a sheet metal bracket for your PCB with a text prompt 5 Min Read](https://flux.seobdtools.com/p/blog/how-to-design-a-sheet-metal-bracket-for-your-pcb-with-a-text-prompt)[ ![Teal isometric line illustration of a PCB between an enclosure base and lid, with downward load arrows](https://flux.seobdtools.com/p/assets/blogs/pcb-enclosure-simulation/main.webp) ### How to run thermal and stress simulation on a PCB enclosure in the browser 8 Min Read](https://flux.seobdtools.com/p/blog/how-to-run-thermal-and-stress-simulation-on-a-pcb-enclosure-in-the-browser)[ ![Teal isometric line illustration of a PCB in an enclosure with an open pin-hinged lid](https://flux.seobdtools.com/p/assets/blogs/hinged-pcb-enclosure/main.webp) ### Designing hinges, snap-fits and moving parts for your enclosure in Flux 7 Min Read](https://flux.seobdtools.com/p/blog/designing-hinges-snap-fits-and-moving-parts-for-your-enclosure-in-flux)[ ![A PCB layout with IPC design standards that apply to trace width, land patterns, and assembly.](https://flux.seobdtools.com/p/assets/blogs/pcb-ipc-standards/main.webp) ### PCB IPC Standards Explained: IPC-2221, IPC-2152, IPC-7351, and More 9 Min Read](https://flux.seobdtools.com/p/blog/pcb-ipc-standards)[ ![A guide to PCB component selection covering electrical specs, footprints, thermal performance, and sourcing best practices](https://flux.seobdtools.com/p/assets/blogs/component-selection-pcb-design/main.webp) ### Component Selection in PCB Design: How Engineers Choose the Right Parts 7 Min Read](https://flux.seobdtools.com/p/blog/component-selection-pcb-design)[ ![Flux Copilot’s new AI-powered part search makes finding and placing components faster and easier using natural language.](https://flux.seobdtools.com/p/assets/blogs/smarter-part-search/main.webp) ### Smarter Part Search Just Got a Major Upgrade 6 Min Read](https://flux.seobdtools.com/p/blog/smarter-part-search-just-got-a-major-upgrade)[ ![A detailed illustration showing PCB footprint design with pad layout, silkscreen markings, and courtyard boundaries](https://flux.seobdtools.com/p/assets/blogs/pcb-footprint-design-guide/main.webp) ### How to Design a PCB Footprint (Step-by-Step Guide) 8 Min Read](https://flux.seobdtools.com/p/blog/pcb-footprint-design-guide)[ ![A close-up xray of printed circuit board with its multi-layer traces featuring short circuit and over current protection.](https://flux.seobdtools.com/p/assets/blogs/protection-circuit-101/main.webp) ### Protection Circuit 101: Securing Your Electronics from Overcurrent and Short Circuits 5 Min Read](https://flux.seobdtools.com/p/blog/protection-circuit-101-securing-your-electronics-from-overcurrent-and-short-circuits)[ ![Diagram of a simple circuit with an inductor and a flyback diode. The resistor represents the resistance of the inductor's windings.](https://flux.seobdtools.com/p/assets/blogs/flyback-diodes/main.webp) ### Understanding the Flyback Diode: Your Essential Guide to Functionality and Why You Need One 3 Min Read](https://flux.seobdtools.com/p/blog/understanding-the-flyback-diode-your-essential-guide-to-functionality-and-why-you-need-one)[ ![3D render of a zener diode with its electronic symbol and pinout which consists of anode and cathode](https://flux.seobdtools.com/p/assets/blogs/what-is-zener-diode/main.webp) ### What Is a Zener Diode? How It Works and Where It’s Used 5 Min Read](https://flux.seobdtools.com/p/blog/what-is-a-zener-diode-an-essential-breakdown)[ ![A cross-section through an nMOSFET when the gate voltage VGS is below the threshold for making a conductive channel; there is little or no conduction between the terminals drain and source; the switch is off. When the gate is more positive, it attracts electrons, inducing an n-type conductive channel in the substrate below the oxide (yellow), which allows electrons to flow between the n-doped terminals; the switch is on.](https://flux.seobdtools.com/p/assets/blogs/mosfet-basics/main.webp) ### Understanding the Fundamentals: MOSFET Basics for Beginners 6 Min Read](https://flux.seobdtools.com/p/blog/understanding-the-fundamentals-mosfet-basics-for-beginners)[ ![Two MOSFET packages on circuit boards, with a green indicator LED.](https://flux.seobdtools.com/p/assets/blogs/nmos-vs-pmos/main.webp) ### NMOS vs PMOS: Differences & When to Use Each 15 Min Read](https://flux.seobdtools.com/p/blog/nmos-vs-pmos)[ ![Two transistor packages mounted on separate circuit boards.](https://flux.seobdtools.com/p/assets/blogs/npn-vs-pnp-transistors/main.webp) ### NPN vs PNP Transistors: Differences & When to Use Each 13 Min Read](https://flux.seobdtools.com/p/blog/npn-vs-pnp-transistors)[ ![Typical schematic diagram of LM741, a classic operational amplifier](https://flux.seobdtools.com/p/assets/blogs/lm741/main.webp) ### LM741 Pinout: A Deep Dive into a Classic Op Amp 4 Min Read](https://flux.seobdtools.com/p/blog/lm741-pinout-a-deep-dive-into-a-classic-op-amp)[ ![An assortment of variable resistors displayed on a dark background with the text 'Variable Resistors' at the top and a circuit symbol for a variable resistor in the center](https://flux.seobdtools.com/p/assets/blogs/6-types-of-variable-resistors/main.webp) ### 6 Types of Variable Resistors: a Detailed Look at Their Uses 5 Min Read](https://flux.seobdtools.com/p/blog/6-types-of-variable-resistors-a-detailed-look-at-their-uses)[ ### Parallel and Series Resistor Calculator 3 Min Read](https://flux.seobdtools.com/p/blog/parallel-and-series-resistor-calculator)[ ![A resistor showing its different color bands](https://flux.seobdtools.com/p/assets/site-cms/643f890cd71a69ee18b71efa_resistor-color-code-calculator.png) ### Resistor Color Code Calculator 4 Min Read](https://flux.seobdtools.com/p/blog/resistor-color-code-calculator)[ ![A comparison illustration of SMT and through-hole PCB assembly technologies](https://flux.seobdtools.com/p/assets/blogs/smt-vs-through-hole/main.webp) ### SMT vs Through-Hole Technology: Which Should You Use? 8 Min Read](https://flux.seobdtools.com/p/blog/smt-vs-through-hole)[ ![A person soldering a circuit board made with Flux](https://flux.seobdtools.com/p/assets/blogs/flux-soldering/main.webp) ### How to Use Flux When Soldering Electronics 12 Min Read](https://flux.seobdtools.com/p/blog/solder-flux-guide-for-soldering)[ ![Different types of toggle switches scattered and a big text - Toggle switch](https://flux.seobdtools.com/p/assets/blogs/toggle-switch/main.webp) ### The Ultimate Guide to Toggle Switches: Types, Uses, and How They Work 3 Min Read](https://flux.seobdtools.com/p/blog/the-ultimate-guide-to-toggle-switches-types-uses-and-how-they-work)[ ![A push button switch soldered on a rigid-flex printed circuit board](https://flux.seobdtools.com/p/assets/blogs/push-button/main.webp) ### What Is the Science Behind Push Button Switches and How They Work 6 Min Read](https://flux.seobdtools.com/p/blog/what-is-the-science-behind-push-button-switches-and-how-they-work)[ ![Tactile Switches: Wiring, Debouncing, and PCB Design](https://flux.seobdtools.com/p/assets/blogs/tactile-switches-guide/main.webp) ### Tactile Switches: Wiring, Debouncing, and PCB Design 8 Min Read](https://flux.seobdtools.com/p/blog/tactile-switches-guide)[ ![Close up of different types of electrical connectors, wire connectors, and solder connectors piled up.](https://flux.seobdtools.com/p/assets/blogs/electrical-connectors/main.webp) ### Electrical Wire Connector Types and Uses 4 Min Read](https://flux.seobdtools.com/p/blog/the-ultimate-guide-to-electrical-connectors-and-wiring-connection)[ ![A selection of low-profile board-to-board connectors on a white background.](https://flux.seobdtools.com/p/assets/blogs/board-to-board-connectors/main.webp) ### Board-to-Board Connectors: Types, Pitch and Stack Height 13 Min Read](https://flux.seobdtools.com/p/blog/board-to-board-connectors)[ ![Temperature probes and a thermistor beside a measurement circuit.](https://flux.seobdtools.com/p/assets/blogs/rtd-vs-thermocouple-vs-thermistor/main.webp) ### RTD vs Thermocouple vs Thermistor: Sensor Selection 14 Min Read](https://flux.seobdtools.com/p/blog/rtd-vs-thermocouple-vs-thermistor)[ ![An illustration of PCB debugging tools and techniques including multimeter, oscilloscope, and thermal imaging](https://flux.seobdtools.com/p/assets/blogs/pcb-debugging-common-issues/main.webp) ### Why Your PCB Is Failing: Debugging Common Issues 7 Min Read](https://flux.seobdtools.com/p/blog/pcb-debugging-common-issues)[ ![555 Timer Guide: Pinout, Operating Modes, and Circuit Examples](https://flux.seobdtools.com/p/assets/blogs/555-timer/main.webp) ### 555 Timer Guide: Pinout, Operating Modes, and Circuit Examples 10 Min Read](https://flux.seobdtools.com/p/blog/555-timer)[ ![Inverting Op-Amp Circuits: Formula, Gain, and Design Examples](https://flux.seobdtools.com/p/assets/blogs/inverting-op-amp/main.webp) ### Inverting Op-Amp Circuits: Formula, Gain, and Design Examples 10 Min Read](https://flux.seobdtools.com/p/blog/inverting-op-amp)[ ![How to Wire a Potentiometer: Pinout, Diagrams, and PCB Examples](https://flux.seobdtools.com/p/assets/blogs/how-to-wire-a-potentiometer/main.webp) ### How to Wire a Potentiometer: Pinout, Diagrams, and PCB Examples 8 Min Read](https://flux.seobdtools.com/p/blog/how-to-wire-a-potentiometer) See All (125) ## Let’s start building. Let’s build your idea together. All you need to do is describe what you want to make, or what problem you want to solve. Flux will work with you to make it a reality. [Try it Free](https://flux.seobdtools.com/signup) ![Close-up of a Flux-designed printed circuit board](https://flux.seobdtools.com/p/assets/homepage-v2/mission-visual.webp)