

LakeTemp
One of my first electronic projects 2011 based on a breadboard. It has lasted almost 10 years of continuous operation.
- Size
- 92 × 82 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 62
- Nets
- 57
- Pads
- 208
- Tracks, vias
- 386, 64
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 15 May 2021
- Updated
- 27 Mar 2022
Overview
LakeTemp is an open-source printed circuit board by foorschtbar, from the foorschtbar/LakeTempESP repository on GitHub. It is a 2-layer board of 92 × 82 mm with 62 parts on 57 nets, routed with 386 tracks and 64 vias.
It is built around the ESP-12E, DS18B20 and ICL7660N, with the PCF8574T, GL5528 and S8050 among its other parts. Its parts include 18 resistors, 11 connectors, 6 capacitors, 5 ICs and 5 diodes. It belongs with the ESP8266 boards of this library.
Main components
7ESP-12E
SMD,24x16mm-20℃~+70℃ -90dBm 16dBm 170mA 2.4GHz 3V~3.6V 56mA 802.11b/g/n ESP8266 Chip On-board PCB Antenna Over-the-air (OTA) update UART、SPI、I2C SMD,24x16mm WiFi Modules ROHSAi-ThinkerWiFi ModulesDS18B20
TO-92-55℃~+125℃ 12bit 3V~5.5V 750ms Single-bus ±0.4℃ TO-92 Temperature Sensors ROHSUMWTemperature SensorsICL7660N
DIP-83V~9.5V DIP-8 Charge Pumps ROHSHGSEMIDC-DC ConvertersPCF8574T
SOP-16-300mil-40℃~+85℃ 100kHz 10uA 2.5V~6V 25mA 300uA 8 8 Cascading and address extension、Built-in LED driver I2C Interrupt Output Open-drain SOP-16-300mil I/O Expanders ROHSHGSEMII/O ExpandersGL5528
插件,P=3mm-30℃~+70℃ 0.6 10kΩ~20kΩ 150V 1MΩ 30ms 30ms 540nm 插件,P=3mm Photoresistors ROHS森霸PhotoresistorsS8050
SOT-23-55℃~+150℃ 1 NPN 100MHz 100nA 120 25V 300mW 500mA 5V 600mV NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
README
README.mdLakeTempESP
WIP...
Hardware 2021

Hardware 2011-2021
One of my first electronic projects 2011 based on a breadboard. It has lasted almost 10 years of continuous operation.
- Arduino Uno
- Ethernet Shield (WIZnet W1500)
- BT42008 LCD (HD44780 4x20)
- WiFi AP in Client Mode
- 5V Power Suppy for the Arduino
- 12V Power Suppy for the AccessPoint

ToDo
- Fix random HW/SW watchdog reboots while uploading data
- Use Light Sensor for nice things
- Trigger data upload from WebUI
- Show last und next upload on Dashboard
- Add MAC Address to JSON Msg
- Flash/Blink LED on Upload
- Flash/Blink LED on Button press
- Fade LED in Idle State
Parts
62| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6, R7, R10, R12, R16 |
| 5 | 4,7K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R9, R11, R13, R15 |
| 4 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4 |
| 3 | SolderJumper_2_Open | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabels | ADR-A1, ADR-A2, ADR-A3 |
| 2 | 150 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R3 |
| 2 | 68 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R4 |
| 2 | Conn_01x02_Female | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J1, J5 |
| 2 | PWR 3.3V | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2, D4 |
| 2 | PWR 5V | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D3 |
| 2 | VAL** | foorschtbar:mouse-bite-2mm-slot | mouse-bite-2mm-slot, mouse-bite-2mm-slot |
| 1 | 1000uF | Capacitor_SMD:CP_Elec_10x10.5 | C6 |
| 1 | 100K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R18 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 10K | Potentiometer_THT:Potentiometer_Runtron_RM-065_Vertical | RV1 |
| 1 | 220K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R17 |
| 1 | Conn_01x02_Female | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J6 |
| 1 | Conn_01x03_Female | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J4 |
| 1 | Conn_01x03_Male | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J10 |
| 1 | Conn_01x04_Female | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J9 |
| 1 | Conn_01x04_Female | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J11 |
| 1 | Conn_01x04_Male | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J7 |
| 1 | Conn_01x06_Male | Connector_JST:JST_PH_B6B-PH-K_1x06_P2.00mm_Vertical | J3 |
| 1 | Conn_01x06_Male | Connector_JST:JST_PH_S6B-PH-K_1x06_P2.00mm_Horizontal | J2 |
| 1 | Conn_01x14_Female | Connector_PinHeader_2.54mm:PinHeader_1x14_P2.54mm_Vertical | J8 |
| 1 | DS18B20 | Package_TO_SOT_THT:TO-92_Inline | U5 |
| 1 | ESP-12E | RF_Module:ESP-12E | U4 |
| 1 | FLASH | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW2 |
| 1 | GL5528 | OptoDevice:R_LDR_5.1x4.3mm_P3.4mm_Vertical | R14 |
| 1 | ICL7660 | Package_SO:SOP-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | NCP1117-3.3_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | PCF8574 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U3 |
| 1 | RESET | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW1 |
| 1 | S8050 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | SolderJumper_3_Open | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP2 |
| 1 | SolderJumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm | JP1 |
| 1 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D5 |
The 56 most common of 62 parts.
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Questions
How big is the LakeTemp PCB?
It measures 92 × 82 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LakeTemp use?
62 parts, built around the ESP-12E, DS18B20, ICL7660N and PCF8574T. 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 LakeTemp KiCad files?
From the foorschtbar/LakeTempESP repository on GitHub, at the commit this page was made from: the board is _pcb/LakeTemp.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the LakeTemp design in my own project?
Its repository states no licence, so its author keeps all rights: ask foorschtbar before reusing the design.