Pifire relay module
About the Pifire relay module
Pifire relay module is an open source PCB design by nebhead, published on GitHub under the MIT license. It is a 2-layer board measuring 65 × 46 mm, with 25 components from 11 distinct parts.
By type, the board carries 8 resistors, 4 transistors, 4 relays, 4 diodes, 3 fuses and 2 connectors.
From the project
PiFire Mechanical Relay Module
This PCB is designed to support mechanical relays for controlling incoming Power(L) to the Igniter, Auger, and AC Fan. This board uses compact mechanical relays that are able to handle high power. This is an alternative to using an off the shelf relay module which simplifies the wiring and even allows you to use the OEM harness.
The design intent for this board was to make a DIY accessible PCB that can be more easily put together by the maker/enthusiast of almost any skill level. Full size components are used in most cases and most (if not all) parts should be readily available to order…
Pifire relay module bill of materials (BOM)
25 components, 11 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | BC547 | TO-92L_Inline | Q1, Q2, Q3, Q4 |
| 1 | AC Terminal | TerminalBlock_bornier-4_P5.08mm | J1 |
| 1 | RELAY/FAN Header | JST_XH_B6B-XH-A_1x06_P2.50mm_Vertical | J6 |
| 3 | Fuse | Fuse_Littelfuse_395Series | F1, F2, F3 |
| 1 | Auger Relay | Relay_SPST_Omron_G5NB | K1 |
| 1 | Igniter Relay | Relay_SPST_Omron_G5NB | K2 |
| 1 | Fan Relay | Relay_SPST_Omron_G5NB | K3 |
| 1 | Power Relay | Relay_SPST_Omron_G5NB | K4 |
| 4 | 1N4007 | D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2, D3, D4 |
| 4 | 4.7k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R3, R5, R7 |
| 4 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R4, R6, R8 |
Pifire relay module design files
The KiCad project lives in the nebhead/pifire-relay-module repository on GitHub; these links point at the commit this page was built from.
- Layoutpifire-relay-module.kicad_pcb
- Schematicpifire-relay-module.kicad_sch
Pifire relay module: common questions
How big is the Pifire relay module?
The Pifire relay module measures 65 × 46 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Pifire relay module?
25 components, from 11 distinct parts. The full bill of materials is listed on this page.
Where can I download the Pifire relay module design files?
From the nebhead/pifire-relay-module repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Pifire relay module design in my own project?
Yes, under the terms of its MIT license, which nebhead chose for the repository.