LPF Relay
About the LPF Relay PCB
LPF Relay is an open source PCB design by RADARC, published on GitHub. It is a 2-layer board measuring 75 × 50 mm, with 54 components from 15 distinct parts.
Other key parts include the MCP23017_SO and ULN2003A. By type, the board carries 15 capacitors, 11 diodes, 11 inductors, 9 resistors, 5 connectors and 2 ICs.
It belongs with the audio, iot & wireless and displays & leds designs in this gallery.
From the project
Controller for High Power RF Power Amplifiers based Raspberry Pi Pico
Reading and District Amateur Radio Club(RADARC) are working together on a number of collaborative construction projects. This one is to design and build a Modular PA controller for High Power (1kW plus) semiconductor Power amplifiers. This prototype implementation is targetted on the High Power HF PA Modules from W6PQL :
Kilowatt PA LPF Filter * Directional Coupler
Main components on the LPF Relay
LPF Relay bill of materials (BOM)
54 components, 15 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP23017_SO | SSOP-28_5.3x10.2mm_P0.65mm | U1 |
| 1 | ULN2003A | SO-16_3.9x9.9mm_P1.27mm | U2 |
| 2 | Conn_01x04 | JST_PH_S4B-PH-SM4-TB_1x04-1MP_P2.00mm_Horizontal | J1, J2 |
| 1 | Conn_01x02 | JST_XH_S2B-XH-A-1_1x02_P2.50mm_Horizontal | J3 |
| 1 | Conn_01x03 | JST_XH_S3B-XH-A-1_1x03_P2.50mm_Horizontal | J4 |
| 1 | Conn_01x06 | JST_XH_S6B-XH-A-1_1x06_P2.50mm_Horizontal | J5 |
| 1 | 500mA | Fuse_0805_2012Metric | F1 |
| 1 | SP0503BAHT | SOT-143 | D1 |
| 10 | SMF4L12A | D_SOD-123F | D2, D3, D4, D5, D6, D7, D8, D9 +2 |
| 11 | 1uH | L_0603_1608Metric | L1, L2, L3, L4, L5, L6, L7, L8 +3 |
| 14 | 100n | C_0603_1608Metric | C1, C2, C4, C5, C6, C7, C8, C9 +6 |
| 1 | 1u | C_0603_1608Metric | C3 |
| 4 | 10K | R_0603_1608Metric | R1, R3, R6, R9 |
| 3 | NF | R_0603_1608Metric | R2, R4, R7 |
| 2 | 4k7 | R_0603_1608Metric | R5, R8 |
LPF Relay design files
The KiCad project lives in the RADARC/Modular-PA-Controller repository on GitHub; these links point at the commit this page was built from.
LPF Relay: common questions
How big is the LPF Relay PCB?
The LPF Relay measures 75 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the LPF Relay?
54 components, from 15 distinct parts. The full bill of materials is listed on this page.
Where can I download the LPF Relay design files?
From the RADARC/Modular-PA-Controller repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the LPF Relay design in my own project?
The repository has no license, so all rights stay with RADARC. Use it as a reference, and ask the author before reusing the design.
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