4 layers30.2 × 56.6 mm
4 layers55.4 × 56.6 mm
Steady hands
SijWoo/steady-hands1Wearable to remedy shaky hands
- Size
- 55.4 × 56.6 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 78
- Nets
- 130
- Pads
- 449
- Tracks, vias
- 951, 68
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 23 Apr 2020
- Updated
- 18 Jul 2020
Overview
Steady hands is an open-source printed circuit board by SijWoo, from the SijWoo/steady-hands repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 55.4 × 56.6 mm with 78 parts on 130 nets, routed with 951 tracks and 68 vias.
It is built around the CPT112S-A02-GMR, TPS62841DGRR and TPS63001DRC, with the BNO055, BQ24075RGT and 1N4148WS among its other parts. Its parts include 28 capacitors, 15 resistors, 7 ICs, 7 connectors and 4 diodes. It belongs with the STM32 boards of this library.
Main components
7
CPT112S-A02-GMR
QFN-20-EP(3x3)1.8V~3.6V QFN-20-EP(3x3) Touch Sensors ROHSSilicon LabsTouch Sensors
TPS62841DGRR
HVSSOP-8-40℃~+125℃@(TJ) 1 1.8MHz 1.8V~6.5V 60nA 750mA 800mV~1.55V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Output discharge、Cycle-by-cycle current limiting Step-down type Yes HVSSOP-8 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TPS63001DRC
VSON-10-EP(3x3)-40℃~+85℃@(TA) 1 1.5MHz 1.8V~5.5V 3.3V 50uA Buck-Boost Buck-Boost Built-in Fixed Yes VSON-10-EP(3x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BNO055
LGA-28(3.8x5.2)-40℃~+85℃ 2.4V~3.6V 40uA I2C、UART IMU X,Y,Z X,Y,Z ±16g ±2000dps LGA-28(3.8x5.2) Accelerometers ROHSBosch SensortecAccelerometers
BQ24075RGT
QFN-16-EP(3x3)-40℃~+125℃ 1.5A 4.2V 4.35V~6.4V 6.5uA Charging IC Lithium Battery Not supported Support QFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery Management
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
DMN2004WKQ
SOT-323-55℃~+150℃ 1 N-channel 150pF 1V 200mW 20V 20pF 25pF 540mA 700mΩ@2.5V SOT-323 MOSFETs ROHSDiodes IncorporatedMOSFETs
README
README.mdIntroduction
This repo contains the src files and hardware for a wearable wrist band that treats chronic shaky hands.
Background
Tremors make your hands or other parts of your body involuntarily move and shake. Severe cases can even make everday tasks difficult. This device is to let people from mild to severe cases regain control through the use of vibration feedback.
How it works
Overloading the sensory nerves can surpress the involuntary movement. Vibration motors are implemented inside the wearable to constantly stimulate the nerves.
Parts
78| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R4, R5, R6, R7, TH1 |
| 6 | 100n | Capacitor_SMD:C_0402_1005Metric | C2, C4, C5, C6, C8, C17 |
| 5 | 1u | Capacitor_SMD:C_0402_1005Metric | C9, C10, C11, C16, C18 |
| 5 | 4.7u | Capacitor_SMD:C_0402_1005Metric | C3, C7, C19, C20, C22 |
| 4 | 10u | Capacitor_SMD:C_0402_1005Metric | C21, C24, C25, C26 |
| 3 | R | Resistor_SMD:R_0402_1005Metric | R8, R9, R10 |
| 2 | 0.1u | Capacitor_SMD:C_0402_1005Metric | C1, C23 |
| 2 | 1.5k | Resistor_SMD:R_0402_1005Metric | R11, R12 |
| 2 | 1N4148WS | Diode_SMD:D_SOD-323 | D1, D2 |
| 2 | 2.2u | Inductor_SMD:L_0402_1005Metric | L1, L2 |
| 2 | DMN2004WKQ | Package_TO_SOT_SMD:SOT-323_SC-70 | Q1, Q2 |
| 1 | +1V3 | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
| 1 | +3V3 | TestPoint:TestPoint_Pad_D1.0mm | TP8 |
| 1 | +VBatt | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | -VBatt | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C13 |
| 1 | 100 | Resistor_SMD:R_0402_1005Metric | R13 |
| 1 | 120n | Capacitor_SMD:C_0402_1005Metric | C15 |
| 1 | 220n | Capacitor_SMD:C_0402_1005Metric | C27 |
| 1 | 28.7k | Resistor_SMD:R_0402_1005Metric | R14 |
| 1 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C12 |
| 1 | 4.9u | Capacitor_SMD:C_0402_1005Metric | C28 |
| 1 | ARM_SWD | Sij_Connectors:FTSH-105-01-L-DV-K | J6 |
| 1 | BATT | Connector_JST:JST_PH_B2B-PH-SM4-TB_1x02-1MP_P2.00mm_Vertical | J5 |
| 1 | BGM13S | Sij_MCU:BGM13S | U7 |
| 1 | BNO055 | Package_LGA:LGA-28_5.2x3.8mm_P0.5mm | U3 |
| 1 | BQ24075 | Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm | U4 |
| 1 | CPT112S-A02-GM | Sij_Sensors:CPT112S-A02-GM | U2 |
| 1 | CapSense_01x08 | Sij_Touch:TouchSlider-8_35x10mm | C14 |
| 1 | Charge | LED_SMD:LED_0402_1005Metric | D4 |
| 1 | GND | TestPoint:TestPoint_Pad_1.0x1.0mm | TP2 |
| 1 | I2C | Connector_PinHeader_1.27mm:PinHeader_1x05_P1.27mm_Vertical | J3 |
| 1 | MotorConn | Connector_PinHeader_1.27mm:PinHeader_1x02_P1.27mm_Horizontal | J7 |
| 1 | Motor_DC | Sij_Motors:316040005 | M1 |
| 1 | PWR_SW | Sij_Switches:EG1224 | SW3 |
| 1 | Power | LED_SMD:LED_0402_1005Metric | D3 |
| 1 | RST_BTN | Button_Switch_SMD:SW_SPST_B3U-1000P | SW1 |
| 1 | STM32F411CEUx | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U1 |
| 1 | SWD | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J1 |
| 1 | SYNC_SW | Sij_Switches:EG1224 | SW2 |
| 1 | TPS62841DGR | Sij_Package_SO:HVSSOP-8-1EP_3x3mm_P0.065mm_EP2.2x3.1mm_Mask1.35x1.65mm | U5 |
| 1 | TPS63001 | Package_SON:Texas_DRC0010J_ThermalVias | U6 |
| 1 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | UART | Connector_PinHeader_1.27mm:PinHeader_1x05_P1.27mm_Vertical | J2 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex-105017-0001 | J4 |
| 1 | VBus | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | VINA | TestPoint:TestPoint_Pad_D1.0mm | TP6 |
| 1 | Vout | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
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Questions
How big is the Steady hands PCB?
It measures 55.4 × 56.6 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Steady hands use?
78 parts, built around the CPT112S-A02-GMR, TPS62841DGRR, TPS63001DRC and BNO055. 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 Steady hands KiCad files?
From the SijWoo/steady-hands repository on GitHub, at the commit this page was made from: the board is hardware/development-board/steady-hands.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Steady hands 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).