2 layers99.4 × 99.6 mm
GR Subscriber Line Interface Module
GadgetReboot/Phone_SLIM
POTS Telephone Subscriber Line Interface Module
112 parts62CC-BY-SA-4.0
2 layers70.5 × 35.6 mm
SimpleSLIC
ryukoposting/SimpleSLIC3Serve a simple telephone line with a microcontroller
- Size
- 70.5 × 35.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 15
- Pads
- 54
- Tracks, vias
- 74, 6
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 12 Aug 2025
- Updated
- 12 Aug 2025
Overview
SimpleSLIC is an open-source printed circuit board by ryukoposting, from the ryukoposting/SimpleSLIC repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 70.5 × 35.6 mm with 18 parts on 15 nets, routed with 74 tracks and 6 vias.
It is built around the P6KE82. Its parts include 6 diodes, 4 capacitors, 4 connectors, 1 resistor and 1 IC.
Main components
1README
README.mdSimpleSLIC is an expansion board for a KS0835 Subscriber Loop Interface Card. This board makes it easy to serve a telephone line from any 3.3V or 5V microcontroller.
Basic Use
- Connect the Vcc pin to 3.3 or 5 Volts.
- Connect the GND pin to ground.
- Hook up a telephone to the phone jack.
- To make the phone ring, pull the RM pin up to Vcc, and toggle the FR pin at 20 Hz.
Warning
This device is NOT intended to connect to a telephone line. Rather, this device is a phone line. You connect phones and modems to this board, not other phone lines. Likewise, do not connect two copies of this board directly together by their phone jacks.
If you want to connect two boards together via their phone lines, use a pair of 600:600 audio transformers attached to the tip/ring pins of each board.
Licensing
This project is licensed under the terms of CERN-OHL-S, Version 2. A copy of the
license can be found in the LICENSE file included in this repository.
This repository contains files from third-party sources. Such files are located
in the Libraries/3rdparty directory. Licensing information for these files has
been included with those files, when such information was provided by the
vendor.
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1N4004 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2, D3, D4 |
| 3 | 100nF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C2, C3, C4 |
| 2 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2, J3 |
| 1 | 10uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D6 |
| 1 | Conn_01x09_Pin | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J4 |
| 1 | P6KE82 | Diode_THT:D_DO-15_P12.70mm_Horizontal | D5 |
| 1 | RJ11 | SLIC:RJ11_438600003 | J1 |
| 1 | ~ | SLIC:KS0835F | U1 |
The 16 most common of 18 parts.
Questions
How big is the SimpleSLIC PCB?
It measures 70.5 × 35.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SimpleSLIC use?
18 parts, built around the P6KE82. 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 SimpleSLIC KiCad files?
From the ryukoposting/SimpleSLIC repository on GitHub, at the commit this page was made from: the board is SimpleSLIC.kicad_pcb and its schematic SimpleSLIC.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SimpleSLIC design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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