2 layers100 × 44 mm
Opensolder
howie-j/opensolder
Fully open source JBC T245-compatible soldering station
69 parts55GPL-3.0
2 layers38.7 × 34.9 mm
Devboard final
tufts-embeddedsystems/Bumbling-BeesContributors: Max Ramer, Brandon Gray, Melinda Burns, Alina Shah, Arnav Gupta, Muheng Shen
- Size
- 38.7 × 34.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 45
- Pads
- 89
- Tracks, vias
- 152, 16
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 11 Apr 2022
- Updated
- 5 May 2022
Overview
Devboard final is an open-source printed circuit board by tufts-embeddedsystems, from the tufts-embeddedsystems/Bumbling-Bees repository on GitHub. It is a 2-layer board of 38.7 × 34.9 mm with 19 parts on 45 nets, routed with 152 tracks and 16 vias.
It is built around the ESP32-S2-SOLO-N8, PCT2075GVX and RP402N331F-TR-FE. Its parts include 7 resistors, 5 capacitors, 4 ICs, 1 connector and 1 switch. It belongs with the microcontroller boards boards and the ESP32 boards of this library.
Main components
3
ESP32-S2-SOLO-N8
-- WiFi Modules ROHSEspressif SystemsWiFi Modules
PCT2075GVX
TSOP-6-1.5mm-55℃~+125℃ 11bit 2.7V~5.5V 28ms I2C Temperature threshold monitoring、Low-power standby、Configurable temperature output、Hardware comparator / independent temperature control output ±1℃ TSOP-6-1.5mm Temperature Sensors ROHSNXP SemiconductorsTemperature Sensors
RP402N331F-TR-FE
SOT-23-5-40℃~+85℃@(TA) 1 1.2MHz 3.3V 600mV~4.8V 800mA Boost Boost Built-in Fixed Yes SOT-23-5 DC-DC Converters ROHSNisshinbo Micro Devices Inc.DC-DC Converters
README
README.mdBumbling-Bees
Contributors: Max Ramer, Brandon Gray, Melinda Burns, Alina Shah, Arnav Gupta, Muheng Shen
Goal
Design, build, and program 10 temperature sensor nodes to measure temperature once an hour. Nodes should last 6 months in the field.
Roles
Hardware Engineers: Muheng & Arnav
Firmware Engineers: Brandon & Max
Software Engineers: Mels & Alina
Tasks
Hardware
-
Create an acceptance testing plan. Must test:
-
Sensor and thermistor
-
Remaining battery life
-
WiFi capability
-
-
Build 1 PCB dev board
-
Verify dev board functionality with testing plan
-
Build and test 10 PCB dev boards
Firmware
-
Design main program execution loop
-
Collaborate with software team to finish demos
-
Collaborate with hardware team to develop acceptance tests using software team demos
Software
-
Finalize demos with firmware team:
-
Sensor and thermistor
-
Remaining battery life
-
WiFi & MQTT
-
-
Write program execution loop
-
Setup web server-side HTML to test MQTT messages
File structure
-
hardware/-
pcb/devboard_final/: all KiCad files for development of the temperature node PCB. Also includes Gerber files.
-
testing_plan/: documentation for acceptance tests necessary to ensure correct PCB design.
-
-
PlatformIO/: necessary files for dev environment -
software/-
demo/: all code to demo individual functionality (i.e. measure temperature, connect to WiFi, enter deep sleep) -
libs/: any necessary libraries for developmentmain/: main program execution code for a node. Encompasses all demos.
-
Program Execution
Status Updates
Tuesday 4/26
Thursday 4/28
...
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10kΩ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4 |
| 3 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C3, C4 |
| 2 | 1MΩ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6, R7 |
| 1 | 0.1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6 |
| 1 | 2.2u | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | L1 |
| 1 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | ESP32_S2_SOLO | Module:ESP-32-S2-SOLO | U3 |
| 1 | NCU | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | U2 |
| 1 | PCT2075GV | Package_SO:TSOP-6_1.65x3.05mm_P0.95mm | U1 |
| 1 | RP402N331F-TR-FE | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | SW_DIP_x01 | Module:SW_DS04-254-1-01BK-SMT | SW1 |
Questions
How big is the Devboard final PCB?
It measures 38.7 × 34.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Devboard final use?
19 parts, built around the ESP32-S2-SOLO-N8, PCT2075GVX and RP402N331F-TR-FE. 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 Devboard final KiCad files?
From the tufts-embeddedsystems/Bumbling-Bees repository on GitHub, at the commit this page was made from: the board is hardware/pcb/devboard_final/devboard_final.kicad_pcb and its schematic hardware/pcb/devboard_final/devboard_final.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Devboard final design in my own project?
Its repository states no licence, so its author keeps all rights: ask tufts-embeddedsystems before reusing the design.
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