DIY Handheld Retro Gaming Console Using ESP32

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

This list includes a generic resistor set as a placeholder — it is not matched to the exact value or part number this circuit needs. The correct one is specified on the original source page linked above; check it before buying.

We don't carry yet: Battery (generic / unspecified)
TFT / Touch LCD
Battery Charger Module TP4056
Transistors (BC547 / 2N2222 / TIP / MOSFET)
SD / MicroSD Card
Header Pins / Terminals / Connectors
Capacitors

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How It Works

The DIY handheld retro gaming console is powered by an ESP32 Wrover module featuring 16MB of flash memory, which provides sufficient processing power and storage to run the retro-go-ST7789 firmware and emulate classic 8-bit and 16-bit gaming systems. User inputs are captured via a bank of 6x6x6mm tactile switches configured as a D-pad and action buttons, communicating directly with the microcontroller's GPIO pins. Visual output is rendered on a Waveshare 2-inch 320x240 IPS display module driven by the ST7789V controller, connected via a high-speed display interface. Audio playback is handled through a 3.5mm audio jack (PJ-327-A) paired with a 3.3V active buzzer for sound effects, while game ROMs and assets are loaded externally via an onboard SD Card Slot. Power management is achieved using a 3.7V LiPo battery connected via a 2-pin JST XH connector, routed through an SMD slide switch (1P2T) for system power control. A TP4056 module equipped with battery protection works alongside an AO3401 SMD P-Channel MOSFET, resistors, and capacitors to safely regulate charging, prevent over-discharge, and manage power delivery to the ESP32 DevKit v1 and peripheral modules. Visual and operational status feedback is provided by a 3mm LED indicator.

Why Build This

Apply embedded systems principles to integrate high-speed SPI displays, SD card storage, and audio peripherals with a dual-core microcontroller.

Gain practical experience in power management design by combining LiPo batteries, TP4056 charging circuits, and MOSFET power-switching topologies.

Explore firmware modification, memory mapping, and hardware abstraction layers by configuring custom emulation software like retro-go on an ESP32 architecture.

Real-World Application

Portable gaming devices, retro console emulation development, embedded systems display integration, and DIY electronics hobbyist projects.

Skills You'll Learn

Embedded firmware flashing

SPI display integration

lithium battery power management

schematic interpretation

audio signal routing

tactile matrix button debouncing

Safety Precautions

Ensure correct polarity when connecting the 3.7V LiPo battery and use a protected TP4056 charging module to prevent overcharging or short circuits.

Technology Tags

ESP32

SPI

PCB DESIGN

FIRMWARE MODIFICATION

IPS DISPLAY

RETRO GAMING

C++

ESP-IDF

Frequently Asked Questions

Why is a protected TP4056 module necessary for the 3.7V LiPo battery?

The TP4056 module with protection prevents the LiPo battery from overcharging, over-discharging, or short-circuiting, which are critical safety hazards for lithium-ion power sources.

What is the role of the AO3401 P-Channel MOSFET in this circuit?

The AO3401 P-Channel MOSFET acts as an electronic switch to safely manage power distribution from the battery and charging circuit to the rest of the console components.

How are the games loaded onto the console?

Games are stored on an external SD card inserted into the onboard SD Card Slot, which the ESP32 reads using its SPI communication interface and the retro-go firmware.

Gallery

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