XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver
About the XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver PCB
XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver is an open source PCB design by Stab-Rabbit-coding, published on GitHub under the CERN-OHL-W-2.0 license. It is a 4-layer board measuring 55 × 35 mm, with 41 components from 40 distinct parts.
Other key parts include the 100nF +3V3 U1-VDDA Bypass and 100nF +3V3 U1-VDD Bypass. By type, the board carries 7 capacitors, 3 inductors, 2 ICs and 1 switch.
It belongs with the rf & radio designs in this gallery.
From the project
A functional, security conscious, Unmanned Aerial Vehicle based on the Firefly Class spacecraft Serenity from the 2002 show..
This directory holds the KiCad projects for the four cape/board types:
Per-board net/pin documentation lives in the matching .md files (Pilot.md, TACCO.md, FlightEngineer.md, XCVR-49MHZ-2.md). KiCad files keep KiCad board coordinates (documented exception to the hull-frame standard, see root AGENTS.md).
A pass was made to wire in a second Ethernet channel and to clear the Design-Rule-Check (DRC) and ratsnest issues introduced by a manual component rearrangement. This section records exactly what landed and what is still open, so the thread can be picked up cleanly.
Main components on the XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver
XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver bill of materials (BOM)
41 components, 40 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 100nF +3V3 U1-VDDA Bypass | C_0402_1005Metric | U1 ByA |
| 1 | 100nF +3V3 U1-VDD Bypass | C_0402_1005Metric | U1 ByB |
| 1 | 10nF RX RC Bandpass 1200Hz Cap | C_0402_1005Metric | 1.2k C |
| 1 | 13k Ohm RX RC Bandpass 1200Hz | R_0402_1005Metric | 1.2k R |
| 1 | 10nF RX RC Bandpass 2200Hz Cap | C_0402_1005Metric | 2.2k C |
| 1 | 7.2k Ohm RX RC Bandpass 2200Hz | R_0402_1005Metric | 2.2k R |
| 1 | Si5351A-B-GT 49MHz DDS I2C Synthesiser | MSOP-10_3x3mm_P0.5mm | 49M DDS |
| 1 | 10nF C0G 0402 +3V3 VHF 49MHz Bypass | C_0402_1005Metric | +3V 10n |
| 1 | 10uF X5R 0805 +3V3 Mid-freq | C_0805_2012Metric | +3V 10u |
| 1 | 100nF X7R 0402 +3V3 HF Bypass | C_0402_1005Metric | +3V 100n |
| 1 | 100uF 10V X5R 1210 +3V3 Bulk | C_1210_3225Metric | +3V 100u |
| 1 | 100nF X7R 0402 +5V HF Bypass | C_0402_1005Metric | +5V 100n |
| 1 | 100uF 10V X5R 1210 +5V Bulk | C_1210_3225Metric | +5V 100u |
| 1 | 742792512 | C_0805_2012Metric | +5V Bead |
| 1 | 100nF | C_0402_1005Metric | C_TPM_EMMA1 |
| 1 | 4.7nF_X2Y_C0G | C_0402_1005Metric | GND X2Y |
| 1 | SN74LVC1G04 SOT-23-5 3.3V UART_RX_F->SBUS_OUT | SOT-23-5 | INV1 |
| 1 | MCP1703T-3302 LDO 3.3V 72dB-PSRR@100kHz | SOT-23-5 | LDO 3V3 |
| 1 | SN74LVC1G157 SC-70-6 2:1MUX UART/SBUS Select | SOT-363_SC-70-6 | MUX1 |
| 1 | 2N3866 NPN BJT PA Class-AB Final 100mW | SOT-89-3 | PA 100mW |
Show 20 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1nF U3B Collector RF Bypass | C_0402_1005Metric | PA By2 |
| 1 | 100pF DDS-RF Coupling Cap to U3A | C_0402_1005Metric | PA Cb1 |
| 1 | 100pF PA Interstage Bypass | C_0402_1005Metric | PA Cb2 |
| 1 | 10k Ohm U3A Base Bias Resistor | R_0402_1005Metric | PA Rb1 |
| 1 | 1k Ohm U3B Base Bias Resistor | R_0402_1005Metric | PA Rb2 |
| 1 | 100 Ohm U3A Collector Load | R_0402_1005Metric | PA Rc1 |
| 1 | PB2I-P1-2x18 | 2x18_P1_Socket | PB2-P1 |
| 1 | PB2I-P2-2x18 | 2x18_P2_Socket | PB2-P2 |
| 1 | 10nF C0G 0402 GND-PGND Moat Bridge | C_0402_1005Metric | PGND 10n |
| 1 | SPST-SMD OPEN=UART CLOSED=SBUS | SW_SPST_SMD_2Pin | S1 |
| 1 | TG2520SMN 25MHz TCXO ±0.5ppm | Oscillator_SMD_SeikoEpson_TG2520SMN-xxx-xxxxxx-4Pin_2.5x2.0mm | TCXO 25M |
| 1 | 100nH Coilcraft-0805HQ-101J LPF Series-1 | L_0805_2012Metric | L1 100n |
| 1 | 180nH Coilcraft-0805HQ-181J LPF Series-2 | L_0805_2012Metric | L2 180n |
| 1 | 180nH Coilcraft-0805HQ-181J LPF Series-3 | L_0805_2012Metric | L3 180n |
| 1 | 120pF C0G LPF Shunt-1 | C_0402_1005Metric | C1 120p |
| 1 | 180pF C0G LPF Shunt-2 | C_0402_1005Metric | C2 180p |
| 1 | 120pF C0G LPF Shunt-3 | C_0402_1005Metric | C3 120p |
| 1 | 10uF 10V X5R | C_0603_1608Metric | C-SIK1 |
| 1 | 100nF | C_0402_1005Metric | C-SIK2 |
| 2 | DNP | C_0201_0603Metric | C-SIK-SH1, C-SIK-SH2 |
XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver design files
The KiCad project lives in the Stab-Rabbit-coding/Serenity-UAV repository on GitHub; these links point at the commit this page was built from.
XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver: common questions
How big is the XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver PCB?
The XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver measures 55 × 35 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver?
41 components, from 40 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver design files?
From the Stab-Rabbit-coding/Serenity-UAV repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the XCVR-49MHZ-2 EMI-Hardened 49 MHz AX.25 KISS Transceiver design in my own project?
Yes, under the terms of its CERN-OHL-W-2.0 license, which Stab-Rabbit-coding chose for the repository.
More boards in Serenity-UAV
Flight Engineer — Power Distribution Board
90 × 65 mm115 parts4LCERN-OHL-W-2.01
TACCO — Comms / Logging / Payload Cape
55 × 35 mm108 parts6LCERN-OHL-W-2.01
Pilot — EMI-Hardened Flight Control & Sensor Cape
55 × 35 mm96 parts6LCERN-OHL-W-2.01
Observer
69.9 × 56.4 mm43 parts4LCERN-OHL-W-2.01
CAN-PERIPH-GW-1 / MAL-CAN-PERIPH-GW
64.3 × 19.5 mm39 parts2LCERN-OHL-W-2.01
ENC-NACELLE-1 / SKIPPER-TILT-ENC
7 × 14 mm4 parts2LCERN-OHL-W-2.01
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