5 Practical Ways to Reduce BOM Cost
How do you cut bill-of-materials (BOM) cost without compromising quality or supply security? Five concrete tactics that work in the field, with steps to apply them.
Capacitor Selection: A Comprehensive Technical Guide
The differences between ceramic, electrolytic, tantalum and film capacitors, and a roadmap to the right choice with critical parameters like ESR, ripple current, derating and temperature coefficient.
Inductor Selection: Saturation Current, DCR and Core Losses
How should you evaluate inductance, saturation current (Isat), DC resistance (DCR) and core losses when choosing a power inductor? A comprehensive guide for SMPS design.
Arduino vs Raspberry Pi: Which One for Your Project?
Arduino and Raspberry Pi are often confused, but they're two completely different tools. Learn which is right for your project by comparing power consumption, operating system, real-time behavior and cost.
Diode Types and Selection: Schottky, Zener, TVS and Rectifier
The differences between rectifier, Schottky, Zener, TVS and signal diodes, and choosing the right diode by forward voltage (Vf), reverse voltage (PIV) and switching speed.
What Is EOL? Dealing With NRND and Obsolete Parts
What do end-of-life (EOL), NRND and obsolete mean? How do you catch lifecycle risks early and protect your design from supply disruptions?
How to Calculate Op-Amp Gain (Inverting / Non-Inverting)
Op-amp gain is set by two resistors. Non-inverting 1+Rf/Rin, inverting −Rf/Rin, buffer=1, the dB conversion and the GBW limit.
How to Calculate RC Filter Cutoff Frequency
An RC filter's cutoff is f_c = 1/(2πRC). Low- vs high-pass, the −3 dB point, worked examples and the link to the time constant.
How to Calculate Series and Parallel Capacitors
Capacitors behave the opposite of resistors: parallel adds up, series combines by reciprocals and decreases. Formulas, shortcuts, worked examples and a resistor-vs-capacitor table.
How to Calculate Series and Parallel Resistors
Series resistors add up; parallel resistors combine by reciprocals and decrease. Formulas, the two-resistor shortcut, worked examples and a mixed-circuit solution — with a free calculator.
How to Calculate Antenna Length
Antenna length depends on the wavelength of the operating frequency. The λ = 300/f formula, quarter- and half-wave antennas, velocity factor, a worked example and a frequency–length table.
How to Calculate PCB Trace Impedance
Controlled impedance is essential for high-speed and RF signals. The microstrip formula, target impedances (50/90/100 Ω), a worked example and what affects impedance.
How to Calculate PCB Trace Width
PCB trace width is calculated from the current it carries and the allowed temperature rise, per IPC-2221. The formula, oz-copper conversion, a worked example and a current–width table.
How to Wire an LED Array (Series/Parallel)
Wiring multiple LEDs in series and parallel: the maximum LEDs per series string, the resistor per branch and the total current. Formulas, a worked example and common mistakes.
How to Set the LM317 Output Voltage
The LM317 adjustable regulator's output is set by two resistors: Vout = 1.25 × (1 + R2/R1). The formula, choosing R1/R2, worked examples, dropout and power dissipation.
Standard Resistor Values (E-Series) Explained
Why are resistors made only in certain values? The E6, E12, E24 and precision E48/E96/E192 series, the logic behind them and picking the nearest standard value.
How to Read SMD Resistor Codes
How to read 3-digit, 4-digit (precision) and EIA-96 codes on SMD resistors: the formulas, the 'R' decimal rule and worked examples.
How to Read Capacitor Codes
How to read the 3-digit code on a ceramic capacitor (e.g. 104): the formula, pF/nF/µF conversion, tolerance letters and C0G/X7R/Y5V dielectric codes.
How to Calculate an LED Resistor: Formula and Examples
Why an LED needs a series resistor and how to find its value: the R = (Vsupply − VF) / I formula, forward voltage by color, worked examples, power rating and a calculator.
MOSFET Selection: Rds(on), Gate Charge and Thermal Design
How should you evaluate Rds(on), gate charge (Qg), voltage/current ratings and thermal behavior when choosing a power MOSFET? A comprehensive guide with conduction and switching losses.
MOSFET vs BJT: Which to Choose for Switching?
Should you use a MOSFET or a BJT to switch a load on and off? We compare the two transistor types by drive method, power loss, speed, current capacity and cost to clarify the right choice.
MOQ and Price Breaks: How They Affect Order Cost
What are minimum order quantity (MOQ) and price breaks, and how do they affect purchasing cost? Practical ways to choose the right order quantity.
Choosing a Replacement Part: What to Check
When swapping a component for an equivalent, how should you check the electrical, mechanical and thermal parameters? A step-by-step checklist for a safe transition.
Power Distribution Network (PDN) Basics in PCB Design
A comprehensive technical article on decoupling capacitor selection and placement, plane impedance, target impedance and noise management for a stable power distribution network.
What Is Lead Time, and How Do You Reduce It?
What is lead time, why does it grow and how does it affect supply planning? Practical ways to shorten lead times and manage their risk.
PCB Stackup and Impedance Control
How do you plan a PCB stackup for high-speed designs? A technical guide on reference planes, controlled impedance and layer ordering.
Connector Selection: Current, Mating Cycles and Environmental Durability
How should you evaluate current/voltage rating, contact mating cycles, pitch, locking and environmental durability when choosing a connector? A practical selection guide.
10 Sensors Every Electronics Hobbyist Should Have in the Drawer
10 essential sensors that let your projects interact with the world: temperature, humidity, distance, light, motion and more. We've gathered what each one measures and which project it's useful in.
How to Avoid Counterfeit and Fake Components
How do you spot counterfeit/fake electronic components and protect against them? Practical advice on reliable sourcing, traceability and supply-chain security.
Microcontroller (MCU) Selection Criteria: Peripherals, Memory and Power
How do you choose the right microcontroller (MCU) for your project? Comprehensive selection criteria in terms of core, memory, peripherals, power consumption and ecosystem.
Single-Source Risk and a Multi-Sourcing Strategy
Why is depending on a single supplier (single-source) risky? How do you secure production continuity with a multi-sourcing strategy?
Crystal and Oscillator Selection: Frequency Stability and Load Capacitance
How do you choose between a crystal (XTAL) and an oscillator (XO)? Choosing the right timing source with frequency tolerance, stability, load capacitance (CL) and ESR.
Blink Your First LED With Arduino: A Step-by-Step Project From Scratch
The most classic first project for electronics beginners: blinking an LED with Arduino. We walk through the parts, the wiring, the code and common mistakes from start to finish.
From Prototype to Mass Production: 5 Critical Sourcing Steps
What should you watch for in component sourcing when moving from the prototype stage to mass production? 5 steps for cost, MOQ, lifecycle and multi-sourcing.
EMC/EMI Basics: Ways to Reduce Noise on a PCB
Ways to reduce noise and emissions in PCB design for electromagnetic compatibility (EMC): ground plane, return current path, filtering and layout principles.
How to Prepare a BOM File: Template and Common Mistakes
How do you prepare a correct BOM (bill of materials) file? The columns you need, using MPNs, an Excel/CSV template and the most common mistakes.
A Simple LED Flasher Circuit With a 555 Timer (Schematic + Parts List)
Build the classic flasher circuit that blinks an LED with just a 555 IC — no microcontroller. Working principle, parts list, connections and the speed-setting formula, step by step.
How to Build Your First Power Supply Circuit on a Breadboard
Build a simple power supply that provides a stable 5 V to your circuits on a breadboard. Step-by-step with an LM7805 regulator, filter capacitors, a protection diode and an indicator LED.
Smart Inventory Management in the Electronics Supply Chain
How do you strike the balance between overstock and running out? Fundamentals of data-driven inventory management, safety stock and multi-source procurement.
How to Test a Capacitor With a Multimeter
How do you tell whether a capacitor you suspect is good or bad with a multimeter? We walk through capacitance mode, resistance mode and visual inspection, step by step.
What Determines Electronic Component Prices?
Why do electronic component prices fluctuate? The effect of supply and demand, the semiconductor cycle, order quantity and supply risk on prices.
How to Tell Whether a Transistor Is Good or Bad
How do you test a suspect transistor with a multimeter? We walk through the diode-test method for BJT and MOSFET, telling NPN from PNP, and the signs of a faulty transistor.
How to Find a Short Circuit on a PCB (Multimeter + Thermal Method)
If your board heats up, blows a fuse or won't work at all, it may be a short circuit. We walk through how to locate a short step by step with continuity testing, voltage-drop tracing and a thermal method.
How to Choose the Right Components for an IoT Device
When designing an IoT device, the processor, communication, power and sensor choices determine the product's success. We cover what to watch in each subsystem and compare the wireless technologies.
A Guide to Choosing Motors and Drivers for Robotics Projects
Which of DC, servo, stepper or BLDC motors should you choose for your robotics project, and how do you pick a matching driver? We walk through motor types, driver criteria, power and feedback step by step.
Component Selection in Audio System Design: From Op-Amp to Speaker
Which component is chosen at each stage of a sound signal's journey from source to speaker? A selection-focused, practical guide from the preamp op-amp to the power stage topology, from the coupling capacitor to speaker matching.
Automotive Component Selection: AEC-Q and Temperature Grades
When choosing components for an in-vehicle circuit, why are AEC-Q qualification, temperature grades, load-dump protection and vibration resistance decisive? We explain with examples why a commercial-grade part shouldn't be used in automotive.
Component Selection for Power Electronics in Solar Systems
Which components are chosen in the power chain from panel to battery in a small- to medium-scale solar energy system? We cover charge-controller logic, blocking diode, power MOSFET, inductor and protection elements from an application viewpoint.