
Front Panel Driver
baldengineer/WiFi9600-Modem
Retro-cyling a Practical Peripherals 9600SA into a WiFiModem

Retro-cyling a Practical Peripherals 9600SA into a WiFiModem
Back Panel Board is an open-source printed circuit board by baldengineer, from the baldengineer/WiFi9600-Modem repository on GitHub, published under the MIT licence. It is a 2-layer board of 68.2 × 53.3 mm with 39 parts on 58 nets, routed with 186 tracks and 39 vias.
It is built around the MAX3232ID. Its parts include 7 connectors, 5 capacitors, 3 resistors, 3 diodes and 2 ICs.
Retro-cyling a Practical Peripherals 9600SA into a WiFiModem
Design files and code for WiFi9600.
As a kid, I had a Practical Peripherals 9600SA. For years I used it to connect to BBSes and then the Internet. At least, until I upgraded to a 56K USR Sportser.
This project removes the original electronics and replaces them with an ESP8266, MP3 Player, and some relays. It allows classic computers with a RS-232 port to connect to the internet via telnet.
The MP3 player enables authentic fake modem sounds. And the relays are there for authentic real clicky-clicks.
Live stream archive of the project work is available here: https://www.twitch.tv/baldengineer/videos
Watch the stream and help out in chat here: https://twitch.tv/baldengineer
| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 1u | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4, C5 |
| 4 | MountingHole | MountingHole:MountingHole_2.5mm | H1, H2, H3, H4 |
| 3 | 1k | Resistor_SMD:R_0805_2012Metric | R7, R8, R9 |
| 3 | GND | My Libraries:Harwin-S1751-46-Test-Point | TP1, TP18, TP19 |
| 1 | 5v | LED_SMD:LED_1206_3216Metric | D3 |
| 1 | 8266-Serial | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J13 |
| 1 | DB25_Female_MountingHoles | Connector_Dsub:DSUB-25_Female_EdgeMount_P2.77mm | J14 |
| 1 | DBtoMAX | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J18 |
| 1 | Din | My Libraries:Harwin-S1751-46-Test-Point | TP13 |
| 1 | Front_Panel | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J12 |
| 1 | G*** | My Libraries:BE10 | svg2mod |
| 1 | LED | LED_SMD:LED_1206_3216Metric | D1 |
| 1 | Latch | My Libraries:Harwin-S1751-46-Test-Point | TP15 |
| 1 | MAX3232 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U7 |
| 1 | Power_In | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J15 |
| 1 | Quiic MP3 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J16 |
| 1 | RX | My Libraries:Harwin-S1751-46-Test-Point | TP12 |
| 1 | Relays | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J17 |
| 1 | SCL | My Libraries:Harwin-S1751-46-Test-Point | TP9 |
| 1 | SDA | My Libraries:Harwin-S1751-46-Test-Point | TP10 |
| 1 | Ser-Clk | My Libraries:Harwin-S1751-46-Test-Point | TP14 |
| 1 | TX | My Libraries:Harwin-S1751-46-Test-Point | TP11 |
| 1 | VCC | My Libraries:Harwin-S1751-46-Test-Point | TP17 |
| 1 | Vin | My Libraries:Harwin-S1751-46-Test-Point | TP16 |
| 1 | Vin | LED_SMD:LED_1206_3216Metric | D2 |
| 1 | WeMos_mini | My Libraries:D1_mini_board | U6 |
The 37 most common of 39 parts.

baldengineer/WiFi9600-Modem
Retro-cyling a Practical Peripherals 9600SA into a WiFiModem

baldengineer/WiFi9600-Modem
Retro-cyling a Practical Peripherals 9600SA into a WiFiModem

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It measures 68.2 × 53.3 mm and has 2 copper layers, 1.6 mm thick.
39 parts, built around the MAX3232ID. 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.
From the baldengineer/WiFi9600-Modem repository on GitHub, at the commit this page was made from: the board is KiCad Design Files/Back Panel Board/Back Panel Board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).