TWO NEW GUIDES: Telephone Edition @adafruit @johnedgarpark #adafruit

Things are looking pretty phone-tastic here at Adafruit Learn Guide central with this pair of retro telephone projects.

First up is the Rotary Phone Dial Keypad. This project shows you how to non-destructively modify a Western Electric 500DM rotary phone and turn it into a USB number entry device! A KB2040 Kee Boar interprets the dial pulses and then sends key-presses to your computer or mobile device.

Second is the self-contained Touch Tone Phone Dial-a-Song built with a Western Electric 2500DM (the successor to the 500DM) and a Feather RP2040 hidden behind the keypad. With it, people can dial a number to hear a song or message played through the handset earpiece. The CircuitPython keypad library makes it simple to read the Touch Tone keypad matrix.

I’m not going to tell you how to live your life. However, should you choose to put some They Might Be Giants songs on there, you’ll be a hero.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

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