2 layers65 × 56.5 mm
SuperPower RPi KiCAD
SensorsIot/SuperPower
Here you should find the best power supplies for your low-power projects
122 parts600
2 layers25 × 20 mm
RotaryDial2Serial
Qeteshpony/RotaryDial2SerialTranslate signals from a phone rotary dial to serial data
- Size
- 25 × 20 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 10
- Pads
- 36
- Tracks, vias
- 53, 2
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 23 Jul 2024
- Updated
- 21 Dec 2025
Overview
RotaryDial2Serial is an open-source printed circuit board by Qeteshpony, from the Qeteshpony/RotaryDial2Serial repository on GitHub, published under the BSD-2-Clause licence. It is a 2-layer board of 25 × 20 mm with 14 parts on 10 nets, routed with 53 tracks and 2 vias.
It is built around the ATTINY85-20SU. Its parts include 4 resistors, 4 connectors, 2 diodes, 1 capacitor and 1 IC. It belongs with the interfaces and adapters boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdRotaryDial2Serial
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.
Parts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | 680R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1 |
| 1 | ATtiny85-20S | Package_SO:SOIC-8W_5.3x5.3mm_P1.27mm | U1 |
| 1 | Dial | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J2 |
| 1 | Hook | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J3 |
| 1 | ICSP | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J1 |
| 1 | LOGO | My_Footprints:CutieMark5mmInverted | G*** |
| 1 | Power | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 1 | Serial | Connector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_Vertical | J4 |
| 1 | Status | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2 |
The 13 most common of 14 parts.
Similar boards
- 2 layers18.8 × 8.1 mm
Dell charger emulator
KivApple/dell-charger-emulator
Emulator of original Dell charger using ATTINY85
6 parts154 - 2 layers14 × 17.3 mm
- 2 layers43.9 × 29 mm
C64Saver2-addon
bwack/C64-Saver-bwack
C64 Saver v1 and v2 - Overvoltage protection for the C64 and its power brick.
43 parts124 - 2 layers61 × 36.8 mm
- 2 layers200 × 100 mm
Regalodilara
valerionew/very-good-uc-doggos
A special graduation present for a special friend. Six microcontrollers in one devboard
91 parts50 - 2 layers134.3 × 140 mm
- 2 layers50 × 25 mm
LoRa Environmental Sensors
spielhuus/LoRa-Environmental-Sensors
ATtiny85 based LoRa atmospheric sensor board with BME280
5 parts28
Questions
How big is the RotaryDial2Serial PCB?
It measures 25 × 20 mm and has 2 copper layers, 1.6 mm thick.
What parts does the RotaryDial2Serial use?
14 parts, built around the ATTINY85-20SU. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the RotaryDial2Serial KiCad files?
From the Qeteshpony/RotaryDial2Serial repository on GitHub, at the commit this page was made from: the board is pcb/RotaryDial2Serial.kicad_pcb and its schematic pcb/RotaryDial2Serial.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the RotaryDial2Serial design in my own project?
Its repository publishes it under the BSD-2-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).