2 layers308.7 × 241.8 mm
OTTOtact
cester-ino/OTTO-hardware
those specs refer to the tactile buttons version, but a led backlight button version is in the works too.
229 parts49GPL-3.0
2 layers60 × 40 mm
Forcegauge
szbeni/forcegauge18Traning for climbing. Load cell with HX711 and real time plotting,
- Size
- 60 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 77
- Nets
- 58
- Pads
- 228
- Tracks, vias
- 466, 86
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 26 Dec 2020
- Updated
- 6 Jul 2024
Overview
Forcegauge is an open-source printed circuit board by szbeni, from the szbeni/forcegauge repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 60 × 40 mm with 77 parts on 58 nets, routed with 466 tracks and 86 vias.
It is built around the CH330N, ESP-12E and HX711, with the MT3608, FS312F-G and LM1117-3.3 among its other parts. Its parts include 27 resistors, 16 capacitors, 7 ICs, 5 diodes and 5 transistors. It belongs with the ESP32 and ESP8266 boards of this library.
Main components
12
CH330N
SOP-8-20℃~+70℃ 15mA 2Mbps 3.3V、5V Transceiver SOP-8 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
ESP-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 Modules
HX711
SOP-16-40℃~+85℃ 1.4mA 10Hz、80Hz 1MHz~20MHz、11.0592MHz 2 2.6V~5.5V 20mV、40mV、80mV 24 Built-in External、Built-in SPI Support Yes SOP-16 Analog to Digital Converters (ADC) ROHSAvia SemiconAnalog To Digital Converters (ADC)
MT3608
SOT-23-6-40℃~+85℃ 1 1.2MHz 100uA、1.6mA 2A 2V~24V Adjustable Boost Boost Built-in No SOT-23-6 DC-DC Converters ROHS西安航天民芯DC-DC ConvertersFS312F-G
SOT-23-6-40℃~+85℃ 1 2.9V 2V~4.275V 3uA Lithium Battery Not supported Protection IC SOT-23-6 Battery Management ROHSFortune SemiconBattery Management
LM1117-3.3
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 3.3V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorised
TP4056
ESOP-8-40℃~+85℃ 1 1A 35uA 4.2V 4V~6.5V Charging IC Lithium Battery Support Support 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 ESOP-8 Battery Management ROHSUMWBattery Management
1SS355
SOD-3231.2V@100mA 100mA 100nA@80V 4ns 500mA 80V Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETsFDS6892A
SOIC-8-55℃~+150℃ 1.333nF 1.5V 160pF 17nC@4.5V 2 N-Channel 20V 24mΩ@2.5V 2W 301pF 7.5A N-Channel SOIC-8 MOSFETs ROHSonsemiMOSFETsS8550
SOT-23-55℃~+150℃ 1 PNP 100nA 120 150MHz 25V 300mW 500mA 5V 600mV PNP SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
SS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
README.mdForce Gauge
- ESP32 based Force Gauge - Aiming to help rock climbing specific training (finger excercises)
- Real time plotting via wifi Webapp/Android app
Pictures
Forcegauge with fingerboard
First prototypes
Hardware
Main parts
- ESP32-C3 MCU
- 3 buttons
- OLED screen 0.96" SSD1306
- Battery with charger
- USB UART connection
- HX711 ADC - Load cell
Schematic
PCB
Pictures of the PCB:
Interactive BOM
Software
Firmware
- Arudino IDE - Some lagging issues due to limitations of arduino environment
- Started wokring on firmware with ESP-IDF which supports multitasking
- Added Bluetooth support to come up as a Tindeq Progressor bluetooth device (https://tindeq.com/product/progressor) (CChange Bluetooth and restart device, WIFI wont work when BT is on)
- Added Bluetooth support to come up as a Climbro bluetooth device (https://climbro.com/) (Change Bluetooth settings and restart device, WIFI wont work when BT is on)
Flutter based app (Tested on Android)
- Available on Google play: https://play.google.com/store/apps/details?id=com.github.szbeni.forcegauge
- Real time plotting
- Built in tabata timer (Based on https://github.com/insin/tabata_timer)
- Record history of traning
Webapp
- Simple webapp served from a HTTP server
Parts
77| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 100nF | Capacitor_SMD:C_0603_1608Metric | C3, C4, C5, C8, C10, C11, C13, C14, C16 |
| 6 | 10k | Resistor_SMD:R_0603_1608Metric | R14, R16, R18, R25, R26, R28 |
| 5 | 10uF | Capacitor_SMD:C_0603_1608Metric | C2, C7, C9, C12, C15 |
| 5 | 1k | Resistor_SMD:R_0603_1608Metric | R5, R7, R10, R22, R23 |
| 4 | MountingHole | forcegauge:MountingHole_2mm_OLED | H1, H2, H3, H4 |
| 4 | PCB Mounting hole | forcegauge:MountingHole_2mm_OLED | H5, H6, H7, H8 |
| 3 | 100 | Resistor_SMD:R_0603_1608Metric | R1, R6, R15 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric | R9, R13, R24 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3 |
| 2 | 0R | Resistor_SMD:R_0603_1608Metric | R19, R27 |
| 2 | 1SS355 | Diode_SMD:D_SOD-323_HandSoldering | D4, D5 |
| 2 | 22uF | Capacitor_SMD:C_1812_4532Metric | C1, C6 |
| 2 | 2k | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 2 | 470R | Resistor_SMD:R_0603_1608Metric | R11, R12 |
| 2 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q2, Q5 |
| 1 | 20k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 22uH | Inductor_SMD:L_Wuerth_MAPI-3012 | L1 |
| 1 | 390k | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 7.5k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 8k2 | Resistor_SMD:R_0603_1608Metric | R21 |
| 1 | Battery | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | CH330N | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | ESP-12E | ESP8266:ESP-12 | U6 |
| 1 | FDS6892A | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | Q1 |
| 1 | FS312F-G | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | HX711 | Package_SO:SOP-16_4.55x10.3mm_P1.27mm | U7 |
| 1 | LED GREEN | Diode_SMD:D_0603_1608Metric | D3 |
| 1 | LED RED | Diode_SMD:D_0603_1608Metric | D2 |
| 1 | LM1117-3.3 | Package_TO_SOT_SMD:SOT-223 | U5 |
| 1 | Load Cell | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical | J4 |
| 1 | MT3608 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | OLDED_Screen | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J3 |
| 1 | S8550 | Package_TO_SOT_SMD:SOT-23 | Q4 |
| 1 | SM2331PSA P-MOSFET | Package_TO_SOT_SMD:SOT-23 | Q3 |
| 1 | SS34 | Diode_SMD:D_SMA | D1 |
| 1 | TP4056 | forcegauge:SOP8-PP | U3 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Wuerth_629105150521_CircularHoles | J1 |
Questions
How big is the Forcegauge PCB?
It measures 60 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Forcegauge use?
77 parts, built around the CH330N, ESP-12E, HX711 and MT3608. 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 Forcegauge KiCad files?
From the szbeni/forcegauge repository on GitHub, at the commit this page was made from: the board is hw/forcegauge/forcegauge.kicad_pcb and its schematic hw/forcegauge/forcegauge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Forcegauge design in my own project?
Its repository publishes it under the GPL-3.0 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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