All 40 lessons

Work through them in order, or jump to whatever you need. Prefer to learn by building? Try the Circuit Building section — 20 simple, hands-on circuits. Ready for code? Try the Arduino Uno section — 20 free lessons, the ESP32 Basics section — 20 free lessons, the PIC Microcontroller Basics section — another 20 free lessons, the Raspberry Pi section — 20 more free lessons, or the Key Programming Languages section — 20 free lessons on the languages behind it all.

• 01 — How Electricity Actually Works
• 02 — Voltage, Current & Resistance
• 03 — Ohm's Law
• 04 — AC vs DC
• 05 — Reading Circuit Diagrams
• 06 — Resistors
• 07 — Capacitors
• 08 — Inductors
• 09 — Diodes
• 10 — LEDs
• 11 — Transistors (BJT)
• 12 — MOSFETs
• 13 — Switches & Relays
• 14 — Batteries & Power Supplies
• 15 — Breadboards
• 16 — Multimeters
• 17 — Series vs Parallel Circuits
• 18 — Soldering Basics
• 19 — Safety Basics
• 20 — Your First Circuit: A Blinking LED
• 21 — Digital Logic Gates
• 22 — The 555 Timer IC
• 23 — Operational Amplifiers
• 24 — Voltage Regulators
• 25 — Buck & Boost Converters
• 26 — RC Filters: Low-Pass & High-Pass
• 27 — Oscillators & Clock Signals
• 28 — Introduction to Microcontrollers
• 29 — Analog-to-Digital Conversion
• 30 — Pulse Width Modulation (PWM)
• 31 — Sensors: Types & How They Work
• 32 — Serial Communication: UART
• 33 — The I2C Protocol
• 34 — The SPI Protocol
• 35 — Shift Registers
• 36 — Flip-Flops & Latches
• 37 — PCB Design Basics
• 38 — Grounding & Noise Reduction
• 39 — Reading Datasheets
• 40 — Your Second Project: A Simple Alarm Circuit

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