2 layers
MP Tracker
elektra42/freifunk-open-mppt
Open hard- and software solar maximum power point tracker
70 parts89
2 layers66 × 56.5 mm
Raspberry Pi 2m TX
antonjan/Bacar_Raspberry_tx4This project is to share the Bacar Raspberry Transmitter 2m Transmitter
- Size
- 66 × 56.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 46
- Pads
- 106
- Tracks, vias
- 68, 2
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 15 Jan 2017
- Updated
- 4 May 2019
Overview
Raspberry Pi 2m TX is an open-source printed circuit board by antonjan, from the antonjan/Bacar_Raspberry_tx repository on GitHub. It is a 2-layer board of 66 × 56.5 mm with 32 parts on 46 nets, routed with 68 tracks and 2 vias.
It is built around the BC817-40. Its parts include 9 resistors, 6 capacitors, 6 connectors, 4 inductors and 1 IC.
Main components
1README
README.mdThis board is now compleet. Testing will start shortely.
This repository will have all the files for the PCB that fits on a Raspberry Pi witch will have a 7 stage low pass filter for the VHF 2m band. (About 60db down for first harmonic).
It also now include a Mini Circuits low pass filter so you could use this board for two bands.
Operating manual will be available shortly.
This board is to be used with the rpitx utility to alow you to transmit on the 2m VHF band.
This board will have 7 stage lowpass filter.
Here is the filter design details.
Filter similator Diagram
The PCB files is Kicad file format.
The circuit diagram.
PCB layout diagram during design
Chnaged Connectors transistor and regulator
PCB 3D view
Top SMA Connector is linkd to one filter.
Botom SMA connector is connected to 7 stage filter.
3DB RF Attenuator T (Kicad)
6dB Rf attenuator T (Kicad)
9dB Rf attenuator T (Kicad)
PCB wave guide with Ground plane impedance calculator 50ohm (Kicad)
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 0 | Resistors_SMD:R_0805 | R2, R4, R5, R6, R8 |
| 4 | RPi_Hat:RPi_Hat_Mounting_Hole | , , , | |
| 2 | 110nH | Capacitors_SMD:C_0805_HandSoldering | L2, L3 |
| 2 | 56nH | Capacitors_SMD:C_0805_HandSoldering | L1, L4 |
| 2 | oc | Resistors_SMD:R_0805 | R3, R7 |
| 1 | 10nf | Capacitors_SMD:C_0805 | C1 |
| 1 | 1uF | Capacitors_SMD:c_elec_4x5.7 | C2 |
| 1 | 250 | Resistors_SMD:R_0805 | R9 |
| 1 | 2Sip200 | Terminal_Blocks:TerminalBlock_Pheonix_MKDS1.5-2pol | P3 |
| 1 | 33pF | Capacitors_SMD:C_0805_HandSoldering | C4 |
| 1 | 33pF | Capacitors_SMD:C_0805 | C6 |
| 1 | 36pF | Capacitors_SMD:C_0805 | C5 |
| 1 | 3Sip100 | Pin_Headers:Pin_Header_Straight_1x03 | P1 |
| 1 | 47uF | Capacitors_SMD:c_elec_6.3x5.7 | C3 |
| 1 | 4Sip200 | Terminal_Blocks:TerminalBlock_Pheonix_MKDS1.5-4pol | P2 |
| 1 | 4k7 | Resistors_SMD:R_0805 | R1 |
| 1 | BC817-40 | TO_SOT_Packages_SMD:SOT-23 | Q1 |
| 1 | CONN_01X02 | Pin_Headers:Pin_Header_Straight_1x02 | P5 |
| 1 | L4940V5 1.5A | Power_Integrations:TO-220 | U1 |
| 1 | LED | LEDs:LED-3MM | D1 |
| 1 | RPi_GPIO | Pin_Headers:Pin_Header_Straight_2x20 | J3 |
| 1 | SMA | Bacar:SMA_Edge | P4 |
Questions
How big is the Raspberry Pi 2m TX PCB?
It measures 66 × 56.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Raspberry Pi 2m TX use?
32 parts, built around the BC817-40. 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 Raspberry Pi 2m TX KiCad files?
From the antonjan/Bacar_Raspberry_tx repository on GitHub, at the commit this page was made from: the board is Raspberry_Pi_2m_TX.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Raspberry Pi 2m TX design in my own project?
Its repository states no licence, so its author keeps all rights: ask antonjan before reusing the design.
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