4 layers124.6 × 68.7 mm
4 layers48.2 × 46.2 mm
Voltlog UHF repeater
voltlog/VoltNode30More info about this project in Voltlog #385.
- Size
- 48.2 × 46.2 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 50
- Pads
- 134
- Tracks, vias
- 254, 144
- Pours
- 10
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 19 Oct 2021
- Updated
- 4 Dec 2023
Overview
Voltlog UHF repeater is an open-source printed circuit board by voltlog, from the voltlog/VoltNode repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 48.2 × 46.2 mm with 39 parts on 50 nets, routed with 254 tracks and 144 vias.
It is built around the 0500LP15A500E, BC847 and BC857. Its parts include 15 resistors, 5 capacitors, 4 diodes, 3 connectors and 2 transistors.
Main components
3
0500LP15A500E
SMD-8P,2x1.3mm-40℃~+85℃ 0.7dB 500MHz 50Ω Low Pass SMD-8P,2x1.3mm RF Filters ROHSJohanson DielectricsRF Filters
BC847
SOT-231 NPN 100MHz 100mA 100nA 110 200mW 45V 500mV 6V NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)BC857
SOT-231 PNP 100MHz 100mA 15nA 200mW 45V 5V 650mV 800 PNP SOT-23 Bipolar (BJT) ROHSSTMicroelectronicsBipolar (BJT)
README
README.mdVoltNode™
VoltNode™ is a SA818 based UHF/VHF node designed to be compatible with the open source SVXLink project. The PCB was designed to fit over the OrangePiZero and the schematic and GPIO choice is based on the original work of the ROLink community, with the goal of having this hardware compatible with ready made OS images create by the ROLink community.
More info about this project in Voltlog #385.
Checkout assembly.pdf above for a drawing with component position and designators. This should help when you are assembling the PCB.
Someone designed a 3D printable case for the VoltNode.
Known issues in revA: The mic negative input on the orangepizero is left floating which could lead to some input noise being amplified. A fix is indicated in the schematic.
revB: Addressed the issue by addig capacitor to MIC1N.
Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 2K2 | Resistor_SMD:R_0603_1608Metric | R2, R8, R10, R15 |
| 4 | MountHole | MountingHole:MountingHole_3.2mm_M3_ISO14580_Pad | H1, H2, H3, H4 |
| 3 | 10K | Resistor_SMD:R_0603_1608Metric | R4, R7, R12 |
| 3 | 470nF | Capacitor_SMD:C_0603_1608Metric | C1, C3, C5 |
| 3 | Fiducial | Fiducial:Fiducial_0.5mm_Mask1mm | FID1, FID2, FID3 |
| 3 | LED | LED_SMD:LED_0603_1608Metric | D1, D3, D4 |
| 2 | 0,1uF | Capacitor_SMD:C_0603_1608Metric | C2, C4 |
| 2 | 1K | Resistor_SMD:R_0603_1608Metric | R3, R11 |
| 2 | 330R | Resistor_SMD:R_0603_1608Metric | R1, R13 |
| 2 | 47K | Resistor_SMD:R_0603_1608Metric | R5, R9 |
| 1 | 0500LP15A500E | Voltlog:0500LP15A500 | FL1 |
| 1 | 1N4001 | Diode_SMD:D_SMA | D2 |
| 1 | 470R | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 4K7 | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | BC847 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BC857 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | Conn_01x13 | Connector_PinHeader_2.54mm:PinHeader_1x13_P2.54mm_Vertical | J2 |
| 1 | Conn_02x13_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x13_P2.54mm_Vertical | J1 |
| 1 | Conn_Coaxial | Connector_Coaxial:SMA_Amphenol_132134_Vertical | J3 |
| 1 | SA818 | Voltlog:SA818 | U1 |
| 1 | SolderJumper | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
Questions
How big is the Voltlog UHF repeater PCB?
It measures 48.2 × 46.2 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Voltlog UHF repeater use?
39 parts, built around the 0500LP15A500E, BC847 and BC857. 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 Voltlog UHF repeater KiCad files?
From the voltlog/VoltNode repository on GitHub, at the commit this page was made from: the board is voltlog UHF repeater.kicad_pcb and its schematic voltlog UHF repeater.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Voltlog UHF repeater design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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