2 layers139.7 × 88.9 mm
2 layers50.8 × 71.1 mm
FeatherWing KC5
W8LID/HamWing8A carrier board for Dorji DRA818V/U modules that is compatible with Adafruit Feather development boards.
- Size
- 50.8 × 71.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 38
- Nets
- 64
- Pads
- 146
- Tracks, vias
- 244, 35
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 21 Mar 2021
- Updated
- 24 Mar 2021
Overview
FeatherWing KC5 is an open-source printed circuit board by W8LID, from the W8LID/HamWing repository on GitHub. It is a 2-layer board of 50.8 × 71.1 mm with 38 parts on 64 nets, routed with 244 tracks and 35 vias.
It is built around the LM4810MM. Its parts include 10 capacitors, 6 inductors, 5 resistors, 3 ICs and 3 connectors. It belongs with the microcontroller boards boards of this library.
Main components
1README
README.mdHamWing
A FeatherWing for Dorji DRA818V/U modules that is compatible with Adafruit Feather system.
The HamWing FeatherWing allows you to create a fully functional VHF/UHF transceiver using the Adafruit Feather platform. It has the same physical dimensions as the Feather Tripler making it easy to add a microcontroller as well as other FeatherWings like an OLED for a display. The modules are powered via the BAT pin to allow use with a LiPo pack connected to the Feather used for control. The HamWing was designed around the use of an Adafruit Feather M0 but should be compatible with other Feathers as well. We will list other compatible boards as they are verified to work.
The HamWIng can be built as a single band transceiver by populating only one RF module, low pass filter components and u.FL connector.
A 4 pin TRRS jack is used for a speaker mic with PTT button. A LM4810 amplifier is used for audio out. Mic input is shared with both modules. The PTT line is connected to a GPIO pin for use in keying the DRA818 module(s). Configuration of the modules is accomplished using AT commands via serial UART connected to each. The VHF module uses the default serail UART. The UHF module uses a second serial UART created using a SERCOM. This should also work on other Feathers using Software Serial.
Ouput of the modules is connected to a low pass filter to supress harmonics before being routed to a u.FL connector for each.
This project uses the following license for hardware, software and documentation.
Parts
38| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | Jumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_Pad1.0x1.5mm | JP1, JP2, JP3, PD |
| 3 | 20k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3 |
| 2 | 0.47uF | Capacitor_SMD:C_0603_1608Metric | C5, C6 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | 18nH | Inductor_SMD:L_0603_1608Metric | L4, L6 |
| 2 | 27pF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 56nH | Inductor_SMD:L_0603_1608Metric | L1, L3 |
| 2 | 8.7pF | Capacitor_SMD:C_0603_1608Metric | C3, C4 |
| 2 | Conn_Coaxial | Connector_Coaxial:U.FL_Molex_MCRF_73412-0110_Vertical | UHF, VHF |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 100nH | Inductor_SMD:L_0603_1608Metric | L2 |
| 1 | 100uF | Capacitor_SMD:C_1206_3216Metric | C10 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 30nH | Inductor_SMD:L_0603_1608Metric | L5 |
| 1 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C8 |
| 1 | AudioJack4 | Connector_Audio:Jack_3.5mm_PJ320D_Horizontal | J5 |
| 1 | DRA818U | DRA818U_AND_V_Kicad-master:DRA818 | U2 |
| 1 | DRA818V | DRA818U_AND_V_Kicad-master:DRA818 | U1 |
| 1 | LM4810 | Package_SO:TSSOP-8_3x3mm_P0.65mm | U3 |
| 1 | LOGO | fp-kmod:flying_pig_logo | G*** |
| 1 | feather long | Connector_PinSocket_2.54mm:PinSocket_1x16_P2.54mm_Vertical | J1 |
| 1 | feather short | Connector_PinSocket_2.54mm:PinSocket_1x12_P2.54mm_Vertical | J2 |
The 34 most common of 38 parts.
Questions
How big is the FeatherWing KC5 PCB?
It measures 50.8 × 71.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the FeatherWing KC5 use?
38 parts, built around the LM4810MM. 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 FeatherWing KC5 KiCad files?
From the W8LID/HamWing repository on GitHub, at the commit this page was made from: the board is KiCad/FeatherWing_KC5.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the FeatherWing KC5 design in my own project?
Its repository states no licence, so its author keeps all rights: ask W8LID before reusing the design.
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