2 layers45.7 × 32.5 mm
Rflego termination
schusjon/rf_module_chain
The output is implemented as a female SMA receptacle.
36 parts1
2 layers47.4 × 27.5 mm
Rflego start
schusjon/rf_module_chain1The output is implemented as a female SMA receptacle.
- Size
- 47.4 × 27.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 36
- Nets
- 50
- Pads
- 142
- Tracks, vias
- 387, 74
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 12 Jul 2018
- Updated
- 12 Jan 2019
Overview
Rflego start is an open-source printed circuit board by schusjon, from the schusjon/rf_module_chain repository on GitHub. It is a 2-layer board of 47.4 × 27.5 mm with 36 parts on 50 nets, routed with 387 tracks and 74 vias.
Its parts include 18 connectors, 8 capacitors, 8 resistors and 2 ICs. It belongs with the STM32 boards of this library.
README
module_termination/README.mdTermination Module
The termination/end module includes status LEDs to check the power busses and the link status of the chain. Two of them are controlled by the uC and are user programmable. The two additional RF signals, REF and AUX are terminated on the module with 50 ohms.
The output is implemented as a female SMA receptacle.
The prototype carries its own 3.3V LDO due to the critical role of the embedded processor. This last link in the chain reorganizes all data received from preceding modules and transmits them to the control computer. This individual power supply could have offered additional debugging and troubleshooting information but was deemed unnecessary in early test and was therefore omitted from later designs.
Further development could include an automated power supply check: A passive resistor network of voltage dividers and pullups should be enough to generate an unambiguous digital pattern that would enable the uC to read the status of the connected supplies.
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | Conn_01x01 | Pin_Headers:Pin_Header_Straight_1x01_Pitch2.54mm | J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, J13, J15, J17, J18 |
| 8 | 0R | Resistors_SMD:R_0603_HandSoldering | R1, R2, R3, R4, R5, R6, R7, R8 |
| 5 | 100n | Capacitors_SMD:C_0603_HandSoldering | C1, C5, C6, C7, C8 |
| 2 | opt | Capacitors_SMD:C_0603_HandSoldering | C2, C4 |
| 1 | 1u | Capacitors_SMD:C_0603_HandSoldering | C3 |
| 1 | AP131-20 | TO_SOT_Packages_SMD:SOT-23-5 | U1 |
| 1 | Conn_Coaxial | Connector_PCIx1:CONSMAEDGE_ohne_Druck | J14 |
| 1 | PCIx136p | Connector_PCIx1:PCI-EXPRESS-SLOT | J16 |
| 1 | STM32-48PIN | uC:LQFP-48_7x7mm_Pitch0.5mm | U2 |
Questions
How big is the Rflego start PCB?
It measures 47.4 × 27.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Rflego start use?
36 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 Rflego start KiCad files?
From the schusjon/rf_module_chain repository on GitHub, at the commit this page was made from: the board is module_start/rflego_start.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rflego start design in my own project?
Its repository states no licence, so its author keeps all rights: ask schusjon before reusing the design.
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