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CircuitMess Ringo DIY Cell Phone
CircuitMess Ringo DIY Cell Phone
CircuitMess Ringo DIY Cell Phone
CircuitMess Ringo DIY Cell Phone
CircuitMess Ringo DIY Cell Phone

CircuitMess Ringo DIY Cell Phone

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Product Description:

Make your very own mobile phone! It actually makes calls!

This neat little device is an open source mobile phone that you can build yourself. Besides that, Ringo is also an educational device shaped like a mobile phone compatible with all mobile networks. Its purpose: to motivate people to explore, learn and create something new in a fun and interesting way.

What you’ll learn with Ringo

  • how to solder properly
  • what are the basic electronic components and what are their functions
  • what are microcontrollers and some basics of digital electronics
  • how to program a microcontroller in C++, Python and other
  • how a basic mobile phone works

Learn about electronics


How a cell phone works

Microcomputers & microcontrollers

Basic electronic components and their functions

Learn about coding & software

Coding in C++, Phyton & CicuitBlocks

How to make your own apps

How to make your own games

Have fun with your Ringo long after building it

Make calls to your friends with a phone you’ve actually built by yourself!

Text, listen to music, play the preloaded games on your Ringo

Make your own apps and games for Ringo

Improve your coding skills with our easy–to–use programming app



Technical Specifications


  • ESP32 with Xtensa dual-core 32-bit LX6 microprocessor, operating at 160 MHz and performing at up to 600 DMIPS
  • 4 MB of built-in flash memory + 520 kB of SRAM


  • 1.8″, 160×128px full color (RGB 16 bit)
  • 25 FPS refresh rate by default, up to 50 FPS
  • Digitally controllable backlight level


  • 10 bit dedicated DAC (TFA9882)
  • Multi-channel WAV playback
  • 2 W class-D audio amp, audio jack 3.5 mm, 1 W speaker, software volume control


  • 4-way analog joystick, 12-button numeric keypad, A (confirm), B (back), 4 multi-purpose addressable buttons

Micro SD card socket

  • FAT and FAT32 compatible
  • Every console comes with a 4 GB Micro SD card with MAKERphone-compatible games and apps preloaded!


  • Built in Wi-Fi 802.11 b/g/n and Bluetooth v4.2 BR/EDR and BLE
  • SIM800L or SIM7600 dedicated cellular network co-processor (the thing that calls other people)
  • Micro SIM card slot


  • LiPo 3.7 V 1300 mAh, charged through micro USB B port
  • Sufficient for approximately 3 days of normal use

RTC (real time clock)

  • DS1307 Accurate I²C-Integrated RTC – this thing keeps time and takes care of alarms.


  • 8 individually-controllable RGB LEDs mounted on the back of the phone – for signalisation and cosmetic purposes (IT GLOWS!)

Ringo needs tools

You’ll need some basic tools and equipment for assembling your Ringo

  • regular soldering iron (nothing super expensive is required) and some solder
  • diagonal cutter pliers
  • regular screwdriver
  • some solder
  • a piece of insulating tape or some super-glue

What's in the box

  • Ringo circuit board – the main board that connects all the components in a uniform device that can work as a mobile phone
  • Ringo casing – multiple sheets of acrylic cut with the power of lasers. They protect the innards and give Ringo this sleek look
  • 128x160 full color TFT LCD – for playing games, displaying phone numbers and everything in between
  • GSM module – a tiny module responsible for everything related to calling and texting other people
  • Main microcomputer module – a dual core processor with built-in Wi-Fi, BLE, and a charging circuit
  • Sound module – a board with a DAC (digital to analog converter) chip and a headphone jack for music playback (responsible for ringtones, alarms, game sound effects)
  • Amplifier module – makes loud buzzes, bleeps and bloops
  • Stick-on antenna – for superb phone signal (a.k.a. send text messages while in the bathroom)
  • 4 GB Micro SD card – preloaded with games and apps
  • A bag with other tiny electronic components

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