2 layers
4 layers22.5 × 15 mm
Sensor board
tudsat-rocket/sensor_boardNote: This description might need to be updated for hardware revision 2.
- Size
- 22.5 × 15 mm
- Copper layers
- 4
- Thickness
- 0.8 mm
- Parts
- 43
- Nets
- 22
- Pads
- 117
- Tracks, vias
- 180, 40
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 8 Jan 2024
- Updated
- 10 Jul 2026
Overview
Sensor board is an open-source printed circuit board by tudsat-rocket, from the tudsat-rocket/sensor_board repository on GitHub. It is a 4-layer board of 22.5 × 15 mm with 43 parts on 22 nets, routed with 180 tracks and 40 vias.
It is built around the ADC101C021CIMM, INA826AID and MIC5504-3.3YM5, with the ESD5Z36 among its other parts. Its parts include 11 capacitors, 9 resistors, 6 diodes, 4 ICs and 4 connectors. It belongs with the sensors and measurement boards of this library.
Main components
4
ADC101C021CIMM
VSSOP-8-0.65mm-40℃~+105℃ 0.5LSB 1 10 188.9kHz 2.7V~5.5V 3.4MHz 500nA 61.2dB Built-in External I2C Not supported Power-on reset SAR VSSOP-8-0.65mm Analog to Digital Converters (ADC) ROHSTexas InstrumentsAnalog To Digital Converters (ADC)
INA826AID
SOIC-8-18V~-1.5V、1.5V~18V -40℃~+125℃ 1 100dB 104dB 150uV 16mA 18nV/√Hz@1kHz 1MHz 1V/us 200uA 2uV/℃ 35nA 36V 3V~36V 5nA Rail-to-Rail Output SOIC-8 Instrumentation Amplifiers ROHSTexas InstrumentsInstrumentation Amplifiers
MIC5504-3.3YM5
SOT-23-5-40℃~+125℃@(Tj) 1 120uVrms 15uA 180mV@(300mA) 3.3V 300mA 5.5V 75dB@(1kHz) Fixed 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
ESD5Z36
SOD-523-55℃~+125℃ 200nA 260W@8/20us 30pF 36V 45V 4A@8/20us 65V ESD IEC 61000-4-2 Single-channel Unidirectional SOD-523 ESD and Surge Protection (TVS/ESD) ROHSKUUESD And Surge Protection (TVS/ESD)
README
README.mdSensor Board
this module is meant to be a general-purpose amplifier which is going to be used for all analogue sensors which will be in the rocket, those include the WIKA pressure sensors as well as the fancy-fins strain gauges.
Note: This description might need to be updated for hardware revision 2.
Description
The main function of the module is to amplify signals with low voltage levels that are too small to be useful for our ADCs. Therefore the board has two sides with solder pads, one to connect to the IO board and one to connect to a sensor. The layout is designed in a way, that the sensor side is compatible with the WIKA TPR-Flex PCBs.
Features
- Selectable gain (1-1000) -> the selection of RG1 will determine the gain (G = 1 + 49,4kOhm/RG)
- selectable offset -> output offset can either be 0V or Vcc/2
- Breakaway mounting holes
Connections
To IO-Board:
Connects the amplifier module with the IO-Board with the following pins:
- u+ -> positive supply voltage (3-36V)
- u- -> gnd as "neg" supply voltage (only use in single supply mode) | reference for the output signal.
- o+ -> amplified signal, references gnd (u-)
- ref -> selected reference signal (0V or Vcc/2) can be used to get additional information (e.g. detect noise on supply line(?))
To sensor:
Connects the amplifier module with the Sensor with the following pins:
- u+ -> positive supply voltage (filtered supply voltage)
- u- -> neg. supply voltage (gnd)
- s+ -> positive signal
- s- -> negative signal
User guideline:
The Gain resistor (RG1) must be chosen in a way that the expected maximum amplified voltage is lower than 4.85V (5V - 0.15V) and the expected minimum amplified voltage is higher than 0.1V if a smaller (or negative) output voltage is expected the solder jumper for the reference voltage needs to be connected to 3 to set an output shift. Only if the connected sensor is expected to output a signal which exclusively results in an output signal that is in the above given values, can the reference solder jumper be set to 1.
The above-given adjustments are necessary as the IO module is only able to read values between 0V and 5V. A higher Input voltage can be used if the connected sensor needs a supply voltage which exceeds 5V. The amplified signal then still needs to be smaller than the given 4.85V.
Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | ESD5Z36 | Diode_SMD:D_SOD-523 | D2, D3, D7, D8 |
| 3 | 100n | Capacitor_SMD:C_0402_1005Metric | C3, C4, C14 |
| 3 | R100/1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R7, R8 |
| 2 | 100 | Resistor_SMD:R_0402_1005Metric | R9, R10 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R5, R6 |
| 2 | 10n | Capacitor_SMD:C_0402_1005Metric | C7, C8 |
| 2 | 120R | Inductor_SMD:L_0402_1005Metric | FB1, FB2 |
| 2 | 1n | Capacitor_SMD:C_0402_1005Metric | C9, C10 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C15, C16 |
| 2 | JST-GH | Connector_JST:JST_GH_SM04B-GHS-TB_1x04-1MP_P1.25mm_Horizontal | J1, J2 |
| 2 | MountingHole | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H1, H2 |
| 1 | 10u | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 1SS424 | Diode_SMD:D_SOD-523 | D1 |
| 1 | 47k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R2 |
| 1 | 47k | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 4u7 | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | ADC101C021CIMM | Package_SO:VSSOP-8_3x3mm_P0.65mm | U4 |
| 1 | ADR0 | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2 |
| 1 | ADR1 | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | Conn_01x02_Socket | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | J3 |
| 1 | Conn_01x04_Socket | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J5 |
| 1 | ESD5Zxx | Diode_SMD:D_SOD-523 | D4 |
| 1 | INA826AID | Package_SON:WSON-8-1EP_3x3mm_P0.5mm_EP1.2x2mm | IC1 |
| 1 | MCP6001-OT | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | MIC5504-3.3YM5 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | SolderJumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Open_Pad1.0x1.5mm | JP3 |
| 1 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | tbd | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | RG1 |
Questions
How big is the Sensor board PCB?
It measures 22.5 × 15 mm and has 4 copper layers, 0.8 mm thick.
What parts does the Sensor board use?
43 parts, built around the ADC101C021CIMM, INA826AID, MIC5504-3.3YM5 and ESD5Z36. 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 Sensor board KiCad files?
From the tudsat-rocket/sensor_board repository on GitHub, at the commit this page was made from: the board is sensor_board.kicad_pcb and its schematic sensor_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sensor board design in my own project?
Its repository states no licence, so its author keeps all rights: ask tudsat-rocket before reusing the design.
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