Layouts

Hyper Level Shifter

A simple through-hole PCB that pairs an ESP32-S3 Super Mini with a SN74AHCT125N quad bus buffer to shift 3.3V GPIO signals up to 5V logic — designed for driving WS2812B/SK6812 LED strips with Hyperk / HyperHDR ambilight setups.

Front	Back

Download Gerbers (ZIP) — ready for JLCPCB / PCBWay (order bare PCB only)

Features

• Socket for ESP32-S3 Super Mini (2× 1×9 female 2.54mm headers)
• DIP-14 socket for SN74AHCT125N logic level shifter (3.3V → 5V)
• Dual 3-pin 2.54mm screw terminals (top + bottom — choose whichever orientation suits your wiring)
• 68Ω series resistors on data outputs for signal integrity
• 100nF decoupling capacitor on IC VCC
• All through-hole components — no SMD soldering required

Screw Terminal Pinout

Both terminals are electrically identical:

Power (5V) for the LED strips should come from a dedicated 5V supply, not the ESP32.

Signal Path

ESP32 GP1 (3.3V) → SN74AHCT125N 1A → 1Y → 68Ω → Terminal pin 1
ESP32 GP2 (3.3V) → SN74AHCT125N 2A → 2Y → 68Ω → Terminal pin 2
ESP32 GND ──────────────────────────────────────→ Terminal pin 3
ESP32 5V  ──────────────────────────────────────→ IC VCC (pin 14)

BOM

All parts are hand-soldered. No JLCPCB assembly required — order the bare PCB only.

Assembly Notes

• Install the DIP-14 socket first, then insert the SN74AHCT125N IC into the socket
• ESP32-S3 Super Mini plugs into J1/J2 with USB-C port facing toward the "USB Port ↑" silkscreen label
• The decoupling cap (C1) is non-polarised — orientation doesn't matter
• LED strip power should come from a dedicated 5V PSU; the ESP32 5V pin cannot source enough current for a full TV ambilight run

Project Structure

Built with atopile 0.15.x.

ato.yaml                        # Build config
elec/src/
  level_shifter.ato             # Top-level module
  esp32s3_super_mini.ato        # ESP32 socket module
  parts/
    Header1x9F/                 # 1×9 female header
    SN74AHCT125N/               # DIP-14 quad buffer
    ScrewTerminal_2.54_3P/      # 3-pin screw terminal
    Resistor_TH_68R/            # 68Ω axial resistor
    Capacitor_TH_100nF/         # 100nF ceramic disc cap
elec/layouts/default/           # KiCAD PCB layout