Check out the Product Development Expo in Mesa, Arizona! Happening October 21-22, 2025! Stop buying the same old Arduino and ESP32 modules and start making your own. In this video you will learn what a module really is, why so many kits are dated, how to find cutting edge parts, and how to turn a datasheet into a working PCB with EasyEDA. We tour real energy monitoring hardware, explore Texas Instruments, STMicro, onsemi, Alpha Omega, Bosch, and Mouser, then build both a sensor module and a DC DC power module you can reuse in any project. What you will learn • Module vs board and why modular design wins • How to pick modern sensors and power parts with parametric search • The parts of a module pins power ground I2C SPI UART and more • How to skim a datasheet to the specs that matter • Turning a reference circuit into a PCB in EasyEDA • Building a DC DC converter and setting output with resistors • Tips for energy monitoring single phase three phase and wireless Zigbee Resources mentioned Texas Instruments parts search STMicro families and dev resources Onsemi diodes and power devices Alpha Omega MOSFETs and switches Bosch sensors such as BMP390 Mouser parametric filters for quick part discovery EasyEDA for schematic capture and layout If this helped you design smarter modules, tap like, drop your questions in the comments, and subscribe for the next episode where we go from blank project to finished PCB. Chapters 0:00 Old modules 1:08 What is a module 2:34 Energy demo 4:28 Module anatomy 6:50 Product Development Expo 8:20 Finding parts 12:00 Reading datasheets 13:25 Making PCBs 14:32 Resistor Challenge module 15:20 Next steps Keywords Arduino module, ESP32 module, sensor module, energy monitoring, compute module, datasheet, EasyEDA, PCB design, I2C, SPI, UART, SMT, DC DC converter, power design, Zigbee, Texas Instruments, STMicro, onsemi, Alpha Omega, Bosch, Mouser, maker, embedded systems #Arduino #ESP32 #Electronics #Modules #PCBDesign #EasyEDA #Sensors #Maker #Zigbee