Relay expansion
About the Relay expansion PCB
Relay expansion is an open source PCB design by enriquewph, published on GitHub under the MIT license. It is a 2-layer board measuring 78 × 20 mm, with 16 components from 11 distinct parts.
Other key parts include the PCF8574. By type, the board carries 5 connectors, 5 resistors, 3 jumpers, 2 capacitors and 1 IC.
It belongs with the iot & wireless designs in this gallery.
From the project
Modular hardware for IoT & home automation
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Main components on the Relay expansion
Relay expansion bill of materials (BOM)
16 components, 11 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PCF8574 | SOIC-16W_7.5x10.3mm_P1.27mm | U1 |
| 1 | Conn_01x06 | Molex_KK-254_AE-6410-06A_1x06_P2.54mm_Vertical | J1 |
| 1 | Conn_02x06_Odd_Even | PinHeader_2x06_P2.54mm_Vertical | J2 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_bornier-2_P5.08mm | J3 |
| 1 | Conn_01x10 | PinSocket_1x10_P2.54mm_Vertical | J4 |
| 1 | Conn_01x03 | PinSocket_1x03_P2.54mm_Vertical | J5 |
| 3 | SolderJumper_2_Open | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3 |
| 1 | 1uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 2 | 100k | R_1206_3216Metric | R1, R2 |
| 3 | 10k | R_1206_3216Metric | R3, R4, R5 |
Relay expansion design files
The KiCad project lives in the enriquewph/esp-map repository on GitHub; these links point at the commit this page was built from.
Relay expansion: common questions
How big is the Relay expansion PCB?
The Relay expansion measures 78 × 20 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Relay expansion?
16 components, from 11 distinct parts. The full bill of materials is listed on this page.
Where can I download the Relay expansion design files?
From the enriquewph/esp-map repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Relay expansion design in my own project?
Yes, under the terms of its MIT license, which enriquewph chose for the repository.
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