2 layers364.4 × 167.3 mm
2 layers132.5 × 72.5 mm
Fetap board
mmEissen/fetapThis project allows you to convert an old Fetap 611 by replacing it's guts with a Raspberry Pi. All the input/outputs are kept the same to keep the old look and feel of a rotary dial phone.
- Size
- 132.5 × 72.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 46
- Pads
- 109
- Tracks, vias
- 119, 0
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 4 Mar 2024
- Updated
- 27 Oct 2025
Overview
Fetap board is an open-source printed circuit board by mmEissen, from the mmEissen/fetap repository on GitHub. It is a 2-layer board of 132.5 × 72.5 mm with 22 parts on 46 nets, routed with 119 tracks and 0 vias.
It is built around the TIP120.
Main components
1README
README.mdFetap
Revive an old "Fernsprechtischapparat" (Fetap)!
Concept
This project allows you to convert an old Fetap 611 by replacing it's guts with a Raspberry Pi. All the input/outputs are kept the same to keep the old look and feel of a rotary dial phone.
Parts
| Name | Count |
|---|---|
| Fetap 611 (any) | 1 |
| Raspberry Pi Zero v2 | 1 |
| micro SD card | 1 |
| Fetap Board (see below) | 1 |
| Resistor 1KΩ | 5 |
| Capacitor 0.1μF | 4 |
| Transistor TIP120 | 1 |
| Boost converter module | 1 |
| Power supply | 1 |
| Power supply socket | 1 |
| Sound card | 1 |
External Links
Related projects
http://www.dorisaltstaedter.de/images/16_dipl/Diplom_Schoellhorn.pdf
Documents
http://www.ptt-apparate.ch/werbung/telefon/DBP_Anleitungen/FeTAp_61.pdf
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | C | Capacitor_THT:C_Radial_D4.0mm_H7.0mm_P1.50mm | 0.1uF, 0.1uF, 0.1uF, 0.1uF |
| 2 | Conn_01x01_Socket | Fetap:Fetap Pin Vertical | Bell (Brown), Bell (White) |
| 2 | Conn_01x01_Socket | Connector_Wire:SolderWire-0.75sqmm_1x01_D1.25mm_OD3.5mm | 5V, GND |
| 2 | R1 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | 1K, 1K |
| 2 | ~ | Fetap:Fetap Pin Vertical x 4 | Button (Optional), Dial |
| 1 | Conn_01x04_Socket | Connector_JST:JST_EH_B4B-EH-A_1x04_P2.50mm_Vertical | Audio |
| 1 | Conn_02x02_Odd_Even | Fetap:Boost Converter Module | Boost Converter Module |
| 1 | R2 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | 1K |
| 1 | R3 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | 1K |
| 1 | R4 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | 1K |
| 1 | Raspberry_Pi_2_3 | Fetap:RPi Zero | RaspberryPi |
| 1 | SW_Push_Open_Dual | Fetap:Fetap Receiver Switch | ReceiverPushButton1 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | TIP120 | Package_TO_SOT_THT:TO-220-3_Vertical | TIP120 |
| 1 | ~ | Fetap:Fetap Pin Horizontal x 4 | Receiver |
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Questions
How big is the Fetap board PCB?
It measures 132.5 × 72.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Fetap board use?
22 parts, built around the TIP120. 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 Fetap board KiCad files?
From the mmEissen/fetap repository on GitHub, at the commit this page was made from: the board is schematics/fetap_board/fetap_board.kicad_pcb and its schematic schematics/fetap_board/fetap_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Fetap board design in my own project?
Its repository states no licence, so its author keeps all rights: ask mmEissen before reusing the design.