waynesankey/bridge1PCB design for a UART to WiFi bridge using Pico 2W, python code in bridge1_sw repo
Bridge1 is an open-source printed circuit board by waynesankey, from the waynesankey/bridge1 repository on GitHub. It is a 2-layer board of 64 × 50 mm with 14 parts on 65 nets, routed with 39 tracks and 7 vias.
It is built around the SS14. Its parts include 5 capacitors, 1 resistor, 1 IC, 1 diode and 1 connector. It belongs with the radio and wireless and interfaces and adapters boards and the RP2040 boards of this library.
This is a PCB design for a UART to WiFi bridge that goes with the bridge1_sw repo software.
The bridge has a Raspberry Pi Pico 2W microcontroller and runs AI generated MicroPython code.
The bridge is used to provide a web browser interface to remotely control a preamp. The UART connects to a microcontroller in the preamp that controls the local display, inputection relays, mute relay, volume control chips, etc.
The bridge is housed in an inexpensive plastic box that need not be visible to the user and is connected to the preamp by a 4-pin M12 A-coded umbilical cable. The cable has female ends, while the bridge and preamp both have 4-pin M12 A-coded male ends.
The signal chain is:
iPhone <-> WiFi <-> BRIDGE1 (Raspberry Pi Pico 2W) <-> UART (4-pin M12 cable) <-> Preamp (Raspberry Pi Pico)
And the iPhone controls and GUI show the state of the Preamp which holds the true state of the system - so eg. if the volume decoder on the Preamp is used to adjust the volume, that change is immediately seen on the iPhone GUI.
W. Sankey 2/9/26
| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1.0uF | Capacitor_SMD:C_1206_3216Metric | C3, C4 |
| 1 | 0.1uF | Capacitor_SMD:C_1206_3216Metric | C5 |
| 1 | 100uF | Wayne:16SVF180M | C2 |
| 1 | 150 | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 1935187 | Wayne:1935187 | J1 |
| 1 | 220uF | Wayne:EEE1AA221P | C1 |
| 1 | BLM41 | Inductor_SMD:L_1806_4516Metric | FB1 |
| 1 | SS14 | Diode_SMD:D_SMA | D1 |
| 1 | pico | Module:RaspberryPi_Pico_Common_Unspecified | U1 |
The 10 most common of 14 parts.
It measures 64 × 50 mm and has 2 copper layers, 1.6 mm thick.
14 parts, built around the SS14. 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 waynesankey/bridge1 repository on GitHub, at the commit this page was made from: the board is bridge1.kicad_pcb and its schematic bridge1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask waynesankey before reusing the design.
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