2 layers213.3 × 96 mm
Relay module
sq9nje/matrix_antenna_switch
A 2x6 matrix antenna switch for HF HAM radio
154 parts15Unlicense
2 layers70 × 96 mm
Interface module
sq9nje/matrix_antenna_switch15A 2x6 matrix antenna switch for HF HAM radio
- Size
- 70 × 96 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 44
- Nets
- 40
- Pads
- 131
- Tracks, vias
- 175, 394
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 Sep 2019
- Updated
- 22 Mar 2026
Overview
Interface module is an open-source printed circuit board by sq9nje, from the sq9nje/matrix_antenna_switch repository on GitHub, published under the Unlicense licence. It is a 2-layer board of 70 × 96 mm with 44 parts on 40 nets, routed with 175 tracks and 394 vias.
It is built around the MAX13487EEA, 0ZCJ0025AF2E and ER1B. Its parts include 9 resistors, 9 diodes, 7 capacitors, 4 connectors and 3 ICs. It belongs with the radio and wireless and interfaces and adapters boards of this library.
Main components
3
MAX13487EEA
SOIC-8_L4.9-W3.9-P1.27-LS6.0-BLSOIC-8-150mil New Arrivals ROHSAnalog DevicesUncategorised
0ZCJ0025AF2E
1206-40℃~+85℃ 2.3Ω 24V 250mA 40A 500mA 550mΩ 600mW 8s 1206 Resettable Fuses ROHSBel FuseResettable Fuses
ER1B
DO-214AC(SMA)-50℃~+150℃ 100V 1A 1V@1A 35ns 5uA@100V DO-214AC(SMA) Switching Diodes ROHSDIOTECSwitching Diodes
README
interface_module/hardware/README.mdInterface Module Hardware
This directory contains all hardware design files for the 6x2 Matrix Antenna Switch Interface Module, designed in KiCad.
Overview
The interface module is the control hub for the 6x2 matrix antenna switch system, designed by SQ9NJE (Quirky Solutions). The main component of the interface module is an ESP32 DevKit v1 development board. The module is also equipped with a half-duplex RS485 interface with automatic transmission direction detection and a 5V voltage regulator.
Next to the control signal connector for connecting the relay module, there is an additional SAO (Simple Add-On) connector. This connector provides access to I2C bus signals, two GPIO pins, and 3.3V power supply with ground. In the future, it may be used to extend the hardware capabilities of the switch, such as adding a display, band decoder, etc.
🔧 Interactive BOM{:target="_blank"}
Parts
44| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | LED_Small | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D7, D8, D9, D10 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_ISO7380_Pad | H101, H102, H103, H104 |
| 4 | TSDU24V | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2, D4, D5, D6 |
| 3 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C7, C9, C11 |
| 3 | 2.2k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3, R7, R8 |
| 3 | Fiducial | Fiducial:Fiducial_1mm_Mask2mm | FID101, FID102, FID103 |
| 2 | 100u | Capacitor_THT:CP_Radial_D8.0mm_P3.80mm | C8, C10 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R201, R202 |
| 2 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4, R6 |
| 2 | Conn_01x02 | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J3, J4 |
| 2 | Jumper_NC_Small | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1, JP2 |
| 1 | 0ZCJ0025AF2E | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C202 |
| 1 | 120 | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R5 |
| 1 | 22u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C201 |
| 1 | 470 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | Conn_02x03 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J201 |
| 1 | Conn_02x07_Odd_Even | Connector_IDC:IDC-Header_2x07_P2.54mm_Vertical | J2 |
| 1 | ER1B | Diode_SMD:D_SMA | D3 |
| 1 | LM7805_TO220 | Package_TO_SOT_THT:TO-220-3_Horizontal_TabDown | U3 |
| 1 | MAX13487 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_CK_RS282G05A3 | SW1 |
| 1 | Val** | QS Logo:qs_logo | Ref** |
| 1 | ~ | ESP32 DevKit:esp32_devkit_v1_doit | U201 |
Questions
How big is the Interface module PCB?
It measures 70 × 96 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Interface module use?
44 parts, built around the MAX13487EEA, 0ZCJ0025AF2E and ER1B. 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 Interface module KiCad files?
From the sq9nje/matrix_antenna_switch repository on GitHub, at the commit this page was made from: the board is interface_module/hardware/interface_module.kicad_pcb and its schematic archive/rs485_interface_module/hardware/antenna_switch_comms.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Interface module design in my own project?
Its repository publishes it under the Unlicense 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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Antenna switch comms
sq9nje/matrix_antenna_switch
A 2x6 matrix antenna switch for HF HAM radio
44 parts15Unlicense
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