2 layers140.5 × 30 mm
Type e
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
16 parts3kApache-2.0
2 layers25.4 × 45.7 mm
Rf bridge
buserror/rf_bridge39RF (433Mhz) to MQTT Bridge - with hardware
- Size
- 25.4 × 45.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 16
- Nets
- 17
- Pads
- 52
- Tracks, vias
- 50, 2
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 6 Feb 2017
- Updated
- 16 Jan 2018
Overview
Rf bridge is an open-source printed circuit board by buserror, from the buserror/rf_bridge repository on GitHub. It is a 2-layer board of 25.4 × 45.7 mm with 16 parts on 17 nets, routed with 50 tracks and 2 vias.
Its parts include 8 capacitors, 5 connectors, 2 resistors and 1 IC. It belongs with the radio and wireless and home automation and IoT boards of this library.
README
kicad/README.md#Hardware: rf_bridge
Version 1.x of the hardware uses very little hardware. You need:
- An Arduino with ~1.5KB SRAM and bout 6KB flash, and runs at least at 16Mhz.
- A cheap 433Mhz receiver module
- A cheap 433Mhz transmitter module
The pcb also has a RF switch to be able to share the antenna. The prototype didn't have that and used 2 17cm pieces of wire, and it worked just fine, so it's not stricly needed. The hardware here is made to be a neater small package with pigtail connector to a 'proper' antenna.
Finished Project
The PCB is very simple, the arduino I picked is a Nano, and it's mounted vertically with the 433 bits, so the result is quite compact.
Note the 90 Header is offset by one pin.
- You can find the schematic as a .PDF in this directory.
- The PCB was ordered from OSHPark ($9 for 3) -- You can order PCBs directly from this link.
##The BOM:
| Ref. | Value | Description |
|---|---|---|
| C1,C2,C3, | ||
| C4,C7 | 10nF | 0603 Caps. |
| C5 | 100nF | 0604 Cap |
| C6 | 4.7uF | 0805 Capacitor (Optional) |
| C8 | 10pF | 0603 Cap (Optional) |
| P1 | Nano | Arduino Nano v3.0. Use 90 headers for mounting. Only use a 8 pins section of them, and the headers are NOT soldered from the first pin, but from the pin marked GND on the Nano, NOT the VIN pin. |
| P2 | RF_TX | Both the TX and the RX comes from eBay. |
| P3,P4 | RF_RX | These are the exact modules I used |
| P5 | U.FR | SMT 'pigtail' antenna Connector Hirose U.FL |
| R1 | 10K | 0603 Pulldown |
| R2 | 100 | 0603 Filtering, use anytime you like here even R0 |
| U1 | SA630 | SOIC8. RF Antenna Switcher. NXP SA630D |
Parts
16| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10nF | Capacitors_SMD:C_0603 | C1, C2, C3, C4, C7 |
| 1 | 100 | Resistors_SMD:R_0603 | R2 |
| 1 | 100nF | Capacitors_SMD:C_0603 | C5 |
| 1 | 10K | Resistors_SMD:R_0603 | R1 |
| 1 | 10pF | Capacitors_SMD:C_0603 | C8 |
| 1 | 4.7uF | Capacitors_SMD:C_0805 | C6 |
| 1 | BNC | Michels_Library:U.FL-Coax | P5 |
| 1 | CONN_01X08 | Pin_Headers:Pin_Header_Straight_1x08 | P1 |
| 1 | RF_RX1 | Pin_Headers:Pin_Header_Straight_1x04 | P3 |
| 1 | RF_RX2 | Pin_Headers:Pin_Header_Straight_1x04 | P4 |
| 1 | RF_TX | Pin_Headers:Pin_Header_Straight_1x04 | P2 |
| 1 | SA630 | SMD_Packages:SOIC-8-N | U1 |
Questions
How big is the Rf bridge PCB?
It measures 25.4 × 45.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Rf bridge use?
16 parts. 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 Rf bridge KiCad files?
From the buserror/rf_bridge repository on GitHub, at the commit this page was made from: the board is kicad/rf_bridge.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rf bridge design in my own project?
Its repository states no licence, so its author keeps all rights: ask buserror before reusing the design.
Similar boards
- 2 layers41.4 × 14.5 mm
U2f zero
conorpp/u2f-zero
U2F USB token optimized for physical security, affordability, and style
16 parts2.4k - 2 layers77.5 × 33.7 mm
Breakout 72pin 1123038-2-Connector
rusefi/rusefi
rusefi - GPL internal combustion engine control unit
16 parts1.2k - 2 layers122 × 37 mm
V0-UmbilicalBoard
VoronDesign/Voron-Hardware
Cool Hardware designed by the Voron Design group
16 parts1.1kGPL-3.0 - 2 layers152 × 57.6 mm
Videoslotadapter
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
16 parts1kGPL-3.0 - 2 layers36 × 63.4 mm
Smart ringfinal layout
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
16 parts915 - 2 layers60 × 40 mm
- 2 layers21.1 × 26.9 mm
