Electronics Fundamentals
Master the electronic foundations of robotics: Ohm's law, Kirchhoff's laws, transistor switching, motor drivers (H-Bridges, BLDC ESCs), voltage regulators, sensor analog-to-digital conversion, and noise filtering.
All Guides in Electronics Fundamentals
Ohm's Law & Kirchhoff's Laws for Robotics Circuits
Master voltage, current, power calculations, and Kirchhoff’s Current/Voltage Laws (KCL/KVL) for sizing robotic motor drivers and logic rails.
Ohm's Law (V = I * R) and Power formula (P = V * I = I² * R) dictate every component's thermal and electrical limits.
Motor Drivers: H-Bridges, Stepper Drivers & BLDC ESCs
Deep-dive into motor driving topologies: L298N vs DRV8833/TB6612FNG, A4988 microstepping, and Field-Oriented Control (FOC) BLDC Electronic Speed Controllers.
An H-Bridge uses 4 switches to allow bidirectional current flow through inductive motor coils.
Robot Power Architecture: LiPo, LiFePO4, BMS & Buck Regulators
Design safe, noise-isolated power distribution boards (PDB) for autonomous robots using multi-cell lithium chemistries, battery management systems, and switching converters.
LiPo offers high discharge rates (30C-100C) for drones; LiFePO4 offers 3000+ cycle life and thermal stability for heavy AMRs.
Robotics Sensor Interfacing: IMUs, LiDAR, Encoders & Ultrasonic
Learn hardware interfacing, level-shifting, signal filtering, and noise mitigation for 9-axis IMUs, time-of-flight LiDAR, and quadrature optical encoders.
Accelerometers measure gravity + linear acceleration; gyroscopes measure angular rate but suffer from integration drift.
Logic Level Shifting: Interfacing 3.3V Microcontrollers & 5V Sensors
Avoid blowing up 3.3V ARM/ESP32 inputs when talking to 5V legacy sensors using MOSFET-based bidirectional level shifters and TXS0108E ICs.
Applying 5V directly to standard 3.3V ESP32/STM32 GPIO pins will forward-bias internal ESD diodes and destroy the silicon pin cell.
Custom Robotics PCB Design with KiCad 8: From Schematic to Fabrication
Step-by-step tutorial on designing multi-layer robotics carrier boards, trace current sizing, ground planes, EMI layout rules, and JLCPCB assembly.
High-current traces (motors, battery inputs) must be calculated via IPC-2152 to keep temperature rise under 10°C.
Robotics Actuators: RC Servos, Steppers, Coreless DC & BLDC Compared
Comprehensive engineering guide to selecting the right robotic actuator based on torque density, holding torque, backlash, bandwidth, and cost.
Smart serial bus servos (Dynamixel) provide daisy-chained wiring, position, velocity, and temperature feedback over single half-duplex UART.
Failsafe Circuitry: Emergency Stops, Optoisolators & Watchdogs
Protect human operators and sensitive hardware by designing hardware-level Category 3/4 Emergency Stop (E-Stop) circuits, optocouplers, and hardware watchdog timers.
Software-only safety stops can lock up during firmware crashes. An emergency stop must physically cut high-voltage motor power through dual-channel safety relays.