Mini Tamagunio Updated Assembly Guide With Troubleshooting 2026

Tamagunio original tutorial designed and created by Alojz Jakob and released for free under the GNU General Public License.: https://alojzjakob.github.io/Tamaguino/

Helpful addition by educ8s in modified case and screen: https://www.instructables.com/Arduino-Tamagotchi-Clone-Digital-Pet/

However due to the original tutorial being created 9 years ago, the arduino pro mini assembly instructions has been rendered unusable. The original code now take up more memory space than it can realistically compile.

In the following instructions are ways to resolve these problems.

Arduino pro mini x1

4cm x 6cm prototyping PCB x1

LiPo rechargeable battery 500 mAh x1

Micro USB LiPo charging circuit x1

Passive buzzer or piezo buzzer(12mm) x1

Wires/jumpers

DSD TECH SH-U09C x1

FTDI USB to TTL adapter x1

OLED white SSD1306 128x64 x1

SS12D00 slide switch x1

push buttons x3

resistor 2k x1

modified code : https://github.com/liu707318-crypto/Tamaguino-updated-/blob/main/Tamaguino%20-%20noinputresistor

Upload code to Arduino pro mini using DSD TECH SH-U09C like so:

SH-U09C Pro Mini

TXD → RXI

RXD → TXO

GND → GND

VCC → VCC

RTS → DTR

CTS left alone, unplugged

follow the instruction on creator website to place components on breadboard for testing.

3d print out casing from original creator website and format board like so.

Solder left side of each buttons onto gnd, test button with built in blinker to see blinking when one button is presseed. Repeat and change pin number for 7, 8 and 9.

code: https://github.com/liu707318-crypto/Tamaguino-updated-/tree/main

Using 500ma LiPo battery would require the resistor to be replaced and soldered with a 2k resistor on the micro USB LiPo charging circuit. Follow instructions on educ8s, step 3. https://www.instructables.com/Arduino-Tamagotchi-Clone-Digital-Pet

Solder a hole on the top of the case for the charger cord.Epoxy putty can be used to secure all parts laid down by the tape.

completed result..