Custom PCB · IR · Embedded

IR TV Remote

A universal TV remote built on a custom PCB. An ATmega328P drives a 38 kHz IR transmitter, encoding NEC-protocol commands captured and replayed from the original remote — carried all the way from a breadboard prototype through schematic capture, PCB layout, and a fabricated board.

Custom PCBATmega328PIR · 38 kHzNEC protocolKiCad

Overview

MCUATmega328P-PU (DIP-28)

OUTPUT38 kHz IR LED + drive transistor

PROTOCOLNEC (capture & replay)

POWERCoin cell (battery holder)

INPUTS14 tactile buttons

TOOLSKiCad · hand assembly

From prototype to board

Breadboard prototype on Arduino — **Prototype**Breadboard build on an Arduino, validating the IR capture-and-replay before committing to a board.

**Schematic**ATmega328P with the button matrix, IR driver stage, and coin-cell power.

PCB 3D view — **3D View**The finished board layout previewed in 3D — "Michael's Remote."

Final fabricated board — **Final board**The fabricated, assembled PCB in hand.