HardLabs

RotaryDial2Serial

Qeteshpony·RotaryDial2Serial·pcb/RotaryDial2Serial.kicad_pcb

RotaryDial2Serial PCB layout, top view — open source AVR/Arduino board by Qeteshpony

About the RotaryDial2Serial PCB

RotaryDial2Serial is an open source AVR/Arduino PCB design by Qeteshpony, published on GitHub under the BSD-2-Clause license. It is a 2-layer board measuring 25 × 20 mm, with 12 components from 10 distinct parts.

Its main chip is the ATtiny85-20S, from the AVR/Arduino family. By type, the board carries 4 connectors, 4 resistors, 2 diodes, 1 IC and 1 capacitor.

From the project

Translate signals from a phone rotary dial to serial data

This little board allows using the rotary dial of an old phone as an input for modern electronics by translating the signals into serial data.

You need to find the right contacts from the rotary dial mechanism and the phone hook (if you want to use it) and connect them to this board. The board will work with 3.3V or 5V and uses very little power so it can be driven directly from a Raspberry Pi or even an ESP or similar microcontroller.

RotaryDial2Serial, from the project README
From the project README

Main components on the RotaryDial2Serial

ATtiny85-20S

RotaryDial2Serial bill of materials (BOM)

12 components, 10 distinct parts.

QtyPartRefs
1
ATtiny85-20S
U1
1
ICSP
J1
1
Dial
J2
1
Hook
J3
1
Serial
J4
1
Power
D1
1
Status
D2
1
100n
C1
2
100k
R1, R2
2
680R
R3, R4

RotaryDial2Serial design files

The KiCad project lives in the Qeteshpony/RotaryDial2Serial repository on GitHub; these links point at the commit this page was built from.

RotaryDial2Serial: common questions

What microcontroller does the RotaryDial2Serial use?

The RotaryDial2Serial is built around the ATtiny85-20S, from the AVR/Arduino family.

How big is the RotaryDial2Serial PCB?

The RotaryDial2Serial measures 25 × 20 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the RotaryDial2Serial?

12 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the RotaryDial2Serial design files?

From the Qeteshpony/RotaryDial2Serial repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the RotaryDial2Serial design in my own project?

Yes, under the terms of its BSD-2-Clause license, which Qeteshpony chose for the repository.

Can I test firmware for the RotaryDial2Serial without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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