SMD Package Sizes: 0402, 0603, 0805 and 1206 Compared
The dimensions behind the common chip resistor and capacitor package codes, typical power ratings, and how to choose a size you can actually assemble.
Read articleGuides & news
Guides and articles
Component selection guides, design tips and store news from RVP System.
The RVP System Electronics Store Is Now Open
You can now buy resistors, capacitors, regulators, transistors, microcontrollers and LEDs from RVP System online, with search by value and part number.
Read articlePCB and IC Fabrication: Early Access Is Open
We are preparing PCB fabrication, PCB assembly and IC fabrication services. Register your project now to be among the first to use them.
Read articleC0G vs X7R vs X5R vs Y5V: Choosing an MLCC Capacitor Dielectric
The dielectric code on a ceramic capacitor tells you how much its capacitance drifts with temperature, voltage and age. Here is what each code means and …
Read articleLM7805 vs AMS1117: Choosing a Linear Voltage Regulator
Dropout voltage, input range, heat and capacitor requirements for two of the most common linear regulators, with the heat calculation that decides whether either will work.
Read articleHow to Calculate an LED Current-Limiting Resistor
The one formula you need, typical forward voltages by LED colour, worked examples for 5 V and 3.3 V, and how to pick the nearest standard …
Read articleHow to Read Resistor Values: 4k7, 4R7 and SMD Codes Explained
What 4k7, 4R7, R47, 103 and 1002 actually mean, how the E12, E24 and E96 series work, and how to search for the exact resistor you …
Read articleHow to Prepare a Clean BOM for Ordering Components
The columns every bill of materials should have, how to write values so they can't be misread, and the checks that prevent wrong parts and delays.
Read articleDecoupling Capacitors: Why 100 nF, and Where to Place Them
Why nearly every IC has a 100 nF capacitor beside it, when to add larger bulk capacitance, and the placement mistakes that make decoupling ineffective.
Read articleChoosing a MOSFET for Switching: What "Logic-Level" Really Means
Why a MOSFET that works at 10 V can fail at 3.3 V, how to read Rds(on) correctly, and a checklist for switching loads from a …
Read articleATmega328P vs ESP32 vs STM32F103 vs RP2040: Choosing a Microcontroller
A practical comparison of four popular microcontrollers — core, memory, voltage, connectivity and what each one is genuinely good at.
Read articleElectronic components
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