LPF Relay
About the LPF Relay PCB
LPF Relay is an open source PCB design by M0LTE, 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 rf & radio designs in this gallery.
From the project
An attempt to build a complete ham radio transceiver around a Raspberry Pi
A selection of Relay modules to test different options for the Tx/Rx relay for the Pi Transceiver
G2RL Large through hole relay recommended by W6PQL HF3 Surface mount relay recommended by W6PQL EE2 Surface mount relay used in Lime RFE and IC-9700 G6E Through hole relay used in Elecraft XV144
Main components on the LPF Relay
LPF Relay bill of materials (BOM)
54 components, 15 distinct parts — part numbers from the project's BOM.
| 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 Conn_01x04 | JST_PH_S4B-PH-SM4-TB_1x04-1MP_P2.00mm_Horizontal | J1, J2 |
| 1 | CONN_01X02 Conn_01x02 | JST_XH_S2B-XH-A-1_1x02_P2.50mm_Horizontal | J3 |
| 1 | CONN_01X03 Conn_01x03 | JST_XH_S3B-XH-A-1_1x03_P2.50mm_Horizontal | J4 |
| 1 | CONN_01X06 Conn_01x06 | JST_XH_S6B-XH-A-1_1x06_P2.50mm_Horizontal | J5 |
| 1 | 500MA 500mA | Fuse_Bourns_MF-SM_9.5x6.71mm | F1 |
| 1 | SP0503BAHT | SOT-143 | D1 |
| 10 | SMF4L12A | D_SOD-123F | D2, D3, D4, D5, D6, D7, D8, D9 +2 |
| 11 | 1UH 1uH | L_0603_1608Metric | L1, L2, L3, L4, L5, L6, L7, L8 +3 |
| 14 | 100N 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 4k7 | R_0603_1608Metric | R5, R8 |
LPF Relay design files
The KiCad project lives in the M0LTE/pi-transceiver 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, 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 LPF Relay design files?
From the M0LTE/pi-transceiver 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 LPF Relay design in my own project?
The repository has no license, so all rights stay with M0LTE. Use it as a reference, and ask the author before reusing the design.
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