8Relays
About the 8Relays PCB
8Relays is an open source ESP8266 PCB design by LudovicLemarinel, published on GitHub. It is a 2-layer board measuring 67 × 93 mm, with 44 components from 15 distinct parts.
Its main chip is the ESP-12F, from the ESP8266 family. Other key parts include the 74HCT595, AP1117-33 and ULN2803A. By type, the board carries 10 connectors, 10 resistors, 8 relays, 8 diodes, 4 ICs and 2 switches.
It belongs with the iot & wireless designs in this gallery.
From the project
Home Automation based on ESP8266 and MQTT
Main components on the 8Relays
8Relays bill of materials (BOM)
44 components, 15 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HCT595 | SOP-16_4.4x10.4mm_P1.27mm | U1 |
| 1 | AP1117-33 | SOT-223-3_TabPin2 | U2 |
| 1 | ESP-12F | ESP-12E | U3 |
| 1 | ULN2803A | SOIC-18W_7.5x11.6mm_P1.27mm | U4 |
| 1 | 5VIN | TerminalBlock_bornier-2_P5.08mm | J1 |
| 8 | Conn_01x02_Female | TerminalBlock_bornier-2_P5.08mm | J2, J3, J4, J5, J6, J7, J8, J9 |
| 1 | ISP | PinHeader_1x04_P2.54mm_Vertical | J10 |
| 8 | UMS05-1A80-75L | SANYOU-SJ-S | K1, K2, K3, K4, K5, K6, K7, K8 |
| 1 | SW_DPST | SW_SPST_EVPBF | SW1 |
| 1 | FLASH | SW_SPST_EVPBF | SW2 |
| 8 | LED | D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2, D3, D4, D5, D6, D7, D8 |
| 1 | 1uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1 |
| 1 | 100nF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C2 |
| 2 | 10k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R10 |
| 8 | 290 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2, R3, R4, R5, R6, R7, R8, R9 |
8Relays design files
The KiCad project lives in the LudovicLemarinel/EspHomeAutomation repository on GitHub; these links point at the commit this page was built from.
8Relays: common questions
What microcontroller does the 8Relays use?
The 8Relays is built around the ESP-12F, from the ESP8266 family.
How big is the 8Relays PCB?
The 8Relays measures 67 × 93 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 8Relays?
44 components, from 15 distinct parts. The full bill of materials is listed on this page.
Where can I download the 8Relays design files?
From the LudovicLemarinel/EspHomeAutomation repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the 8Relays design in my own project?
The repository has no license, so all rights stay with LudovicLemarinel. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the 8Relays without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.
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