2 layers35.3 × 18.4 mm
Remote Temp Humidity Sensor
gadjet/Multifunction-ESP8266-Sensor-board
AKA Wireless window/door sensor version 4
28 parts3GPL-3.0
2 layers31.4 × 20.6 mm
Window sensor V5
gadjet/Window-Door-sensor-Version-570Version 5 of the Window/Door sensor project this time with ultra low current consumption
- Size
- 31.4 × 20.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 26
- Pads
- 95
- Tracks, vias
- 189, 19
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 25 Mar 2022
- Updated
- 20 Jan 2024
Overview
Window sensor V5 is an open-source printed circuit board by gadjet, from the gadjet/Window-Door-sensor-Version-5 repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 31.4 × 20.6 mm with 32 parts on 26 nets, routed with 189 tracks and 19 vias.
It is built around the ESP-12F, 74AHC1G86SE and 74AHC1G32GW, with the SPX3819M5-L-3-3 among its other parts. Its parts include 12 resistors, 8 capacitors, 5 ICs, 2 connectors and 2 switches. It belongs with the sensors and measurement boards and the ESP8266 boards of this library.
Main components
4
ESP-12F
SMD,24x16mm-40℃~+85℃ -96dBm 15dBm 2.4GHz 3.3V 375mA 55mA PCB UART WIFI4 SMD,24x16mm WiFi Modules ROHSDOITWiFi Modules
74AHC1G86SE
SOT-353-40℃~+125℃ 1 1.5V~3.85V 1uA 2V~5.5V 500mV~1.65V 74AHC Series 8.8ns@5V,50pF 8mA 8mA XOR Gate SOT-353 Logic Gates ROHSDiodes IncorporatedLogic Gates74AHC1G32GW
SOT-353-40℃~+125℃ 1 1.5V~3.85V 1.9V、2.9V、3.94V、4.4V 100mV、100mV、100mV、550mV 1uA 2 2V~5.5V 500mV~1.65V 7.5ns@5V,50pF 74AHC Series 8mA 8mA OR Gate Overvoltage-tolerant input SOT-353 Logic Gates ROHSNexperiaLogic Gates
SPX3819M5-L-3-3
SOT-23-5-40℃~+85℃@(Ta) 1 20V 3.3V 420mV@(100mA) 500mA 5uA 70dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdWindow-Door-sensor-Version-5
I have found an error in the BOM file for the PCBA, U4 has the wrong LSC part number against it, I will correct the file ASAP
The file has now been corrected 8/11/22
*** "Window sensor V5.zip" file added with all the files required for PCBA at JLCPCB.com previous files removed.
Version 5 of the Window/Door sensor project this time with ultra low current consumption and a button input.
I have continued to develop the original window/Door sensor from the Youtube video of Makermeik (https://github.com/MakerMeik) and this is the latest version (version 5)
At each revision I've tried to reduce the power consumption more and more and with this version the Quiescent current with the Door/Window shut is a around 5.4uA and with the door open or using as a WiFi button (Doorbell etc.) then it's around 3.9uA and depending on usage you're looking at years of usage on a small capacity L-ion cell.
The trigger logic is essetially the same as the the original version except the output from the two XOR gates is inverted to give a high pulse and return to Low when stable, this enables the output to trigger the input of an OR gate which self latches to keep the enable pin of the SPX3189 LDO high and the ESP module powered up.
When the ESP has finished running its code it sets GPIO16 low which resets the OR gates latch and powers off the LDO.
To keep the power on time as short as possible I'm using ESP-NOW to send the data packets to the ESP receiver but you could connect to your router and send MQTT messages, this would use more power but as the consumption is quite low the cell would still last quite a long time.
It has been pointed out to me that there are dedicated ICs out there that can handle this sort of thing, wake up from a button at least, but I can't find them readily available and the ones I can find are quite expesive, more than the cost of a populated Version 5 PCB from JLCPCB anyway.
NOTE:
It has been mentioned in the issues that my TX/RX labels are non standard, this is true the pin labelled TX is connected to the RX of the ESP and vice versa.
I do this so when I plug in my flasher board the label match.
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R2, R3, R6, R7, R8, R9, R10, R12 |
| 5 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C5, C6 |
| 2 | 1M | Resistor_SMD:R_0603_1608Metric | R1, R5 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C4, C8 |
| 2 | 74AHC1G86 | Package_TO_SOT_SMD:SOT-23-5 | U1, U2 |
| 2 | SW_Push | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | FLASH, RESET |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | 2u2 | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 3M2 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 74AHC1G32 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | Conn_01x02 | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J1 |
| 1 | Conn_01x05_Male | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | ESP-12F | RF_Module:ESP-12E | U3 |
| 1 | LED_Small | LED_SMD:LED_0805_2012Metric | D1 |
| 1 | SPX3819M5-L-3-3 | Package_TO_SOT_SMD:SOT-23-5 | U5 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H4.3mm | SW2 |
| 1 | SW_Reed | Button_Switch_SMD:SW_SPST_REED_CT10-XXXX-G2 | SW1 |
Questions
How big is the Window sensor V5 PCB?
It measures 31.4 × 20.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Window sensor V5 use?
32 parts, built around the ESP-12F, 74AHC1G86SE, 74AHC1G32GW and SPX3819M5-L-3-3. 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 Window sensor V5 KiCad files?
From the gadjet/Window-Door-sensor-Version-5 repository on GitHub, at the commit this page was made from: the board is Window sensor V5.kicad_pcb and its schematic Window sensor V5.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Window sensor V5 design in my own project?
Its repository publishes it under the GPL-2.0 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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