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2 layers52.3 × 20 mmEsprelay, the printed circuit board in 3D

ESP8266 small signal relay module utilizing an ESP-12-F wifi module for communication and MCU, and has two 2.5-25V inputs, and a single 25v, 100ma high speed open drain output through a TBD062003 DMOS transistor array…

Size
52.3 × 20 mm
Copper layers
2
Thickness
1.6 mm
Parts
42
Nets
39
Pads
126
Tracks, vias
342, 107
Pours
199
Routed
Yes
KiCad
KiCad 7 (file 20221018)
Created
21 Jun 2023
Updated
12 Mar 2024

Overview

Esprelay is an open-source printed circuit board by fredriknk, from the fredriknk/esprelay repository on GitHub, published under the MIT licence. It is a 2-layer board of 52.3 × 20 mm with 42 parts on 39 nets, routed with 342 tracks and 107 vias.

It is built around the ESP-12F, DS8242-33S5 and DS8242-50S3, with the TBD62003AFWG, 1N4148WS and G6K-2P-Y-DC5 among its other parts. Its parts include 10 resistors, 9 capacitors, 4 ICs, 2 diodes and 2 connectors. It belongs with the ESP8266 boards of this library.

Main components

7

README

README.md

ESPRELAY -WORK IN PROGRESS-UNTESTED-

Front

ESP8266 small signal relay module utilizing an ESP-12-F wifi module for communication and MCU, and has two 2.5-25V inputs, and a single 25v, 100ma high speed open drain output through a TBD062003 DMOS transistor array ic. The three relay outputs are capable of driving around 25V 500ma.

Thanks to u/PricelessToolkit/ESPClicker for inspiration. If you need a ready to use product you should so head over to his store and buy his version.

Schematic

Assembly IBOM

Specifications

ParameterDescription
Input voltage5-15v
CurrentTBD Wifi: ##mA, Radio Off: ##mA, Deep sleep ##uA
Communication2.4ghz WIFI, Uart TTL
Baudrate115200
PCB size20x65mm
PCB info1.6mm FR4, HASL lead free, 4 layer (But works with 2)
Case sizeXxXxXmm TBD

Connector

PinGPIODescription
vcc-5-15v
GND-Ground
HI1GPIO42.5-25v input
HI1GPIO52.5-25v input
HO1GPIO1325v 100ma open drain output
R1AGPIO12Relay 1 COM
R1NCGPIO12Relay 1 Normally Closed
R1NOGPIO12Relay 1 Normally Open
R2AGPIO12Relay 1 COM
R2NOGPIO12Relay 1 Normally Open
R3AGPIO12Relay 1 COM
R3NOGPIO12Relay 1 Normally Open

PCB Pictures

Front Side Back

Homeassistant Implementation

TODO

FIRST PRODUCTION PROTOTYPE

TODO

Parts

42
QtyValueFootprintReferences
810KResistor_SMD:R_0402_1005MetricR1, R2, R7, R8, R9, R10, R11, R12
50.1uFCapacitor_SMD:C_0402_1005MetricC3, C4, C5, C8, C9
42.2uFCapacitor_SMD:C_0402_1005MetricC1, C2, C6, C7
21N4148WSDiode_SMD:D_SOD-323D1, D2
2G6K-2P-YRelay_THT:Relay_DPDT_Omron_G6K-2P-YK1, K2
1137kResistor_SMD:R_0402_1005MetricR3
1316kResistor_SMD:R_0402_1005MetricR6
1Conn_01x06_PinTestPoint:TestPoint_Pad_1.0x1.0mm_6padJ1
1DS8242-33S5Package_TO_SOT_SMD:SOT-23-5U1
1DS8242-50S3Package_TO_SOT_SMD:SOT-23-5U2
1ESP-12FRF_Module:ESP-12EU3
1G***kibuzzard-65666C71kibuzzard-65666C71
1G***kibuzzard-65CFDABCkibuzzard-65CFDABC
1G***kibuzzard-65CFDAA7kibuzzard-65CFDAA7
1G***kibuzzard-65666C76kibuzzard-65666C76
1G***kibuzzard-65CFDA91kibuzzard-65CFDA91
1G***kibuzzard-65666C87kibuzzard-65666C87
1G***kibuzzard-65666C6Bkibuzzard-65666C6B
1G***kibuzzard-65CFDAADkibuzzard-65CFDAAD
1G***kibuzzard-65666CB7kibuzzard-65666CB7
1G***kibuzzard-6566713Ekibuzzard-6566713E
1G***kibuzzard-65CFDAB5kibuzzard-65CFDAB5
1G***kibuzzard-65666C7Bkibuzzard-65666C7B
1G***kibuzzard-65CFDAA0kibuzzard-65CFDAA0
1SM12B-GHS-TB(LF)(SN)Connector_JST:JST_GH_SM12B-GHS-TB_1x12-1MP_P1.25mm_HorizontalJ2
1TBD62003AFWGPackage_SO:SOIC-16_3.9x9.9mm_P1.27mmU5

Questions

How big is the Esprelay PCB?

It measures 52.3 × 20 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Esprelay use?

42 parts, built around the ESP-12F, DS8242-33S5, DS8242-50S3 and TBD62003AFWG. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Esprelay KiCad files?

From the fredriknk/esprelay repository on GitHub, at the commit this page was made from: the board is CAD/esprelay/esprelay.kicad_pcb and its schematic CAD/esprelay/esprelay.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Esprelay design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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