Cansat 2023/2024

Introduction

Use

• Raspberry Pi
• TF03 Lidar
• Temperature Sensor
• Pressure sensor

The price is totally

Theory / Hypothesis

Hypothesis. We are able to detect

Raspberry Pi

• Raspberry Pi Zero 2W
• Raspberry Pi Pico
• Raspberry Pi Zero W
• Raspberry Pi Zero

APC220

https://stackoverflow.com/questions/28528072/how-to-use-apc220-radio-communication-module-in-raspberry-pi uses UART.

Inputs

• SPI. Serial Peripheral Interface
• I2C
• UART (Serial) Transmit: GPIO14, receive: GPIO15. We need more UART (Lidar and radio) USB UART (FTDI) is possible. https://www.dfrobot.com/index.php?route=product/product&product_id=147#.UOamLG-sh8E Raspberry Pi 4 supports 4 UART interfaces (https://forums.raspberrypi.com//viewtopic.php?t=244827).

Analog to digital converters.

Analog Inputs

Eg. MCP3008 analog-to-digital converter (ADC). See https://randomnerdtutorials.com/raspberry-pi-analog-inputs-python-mcp3008/ This requires soldering and a lot of wires.

PiMoroni IO Expander.

Temp

• DS18B20 + 4.7 kOhm resistor. DS18B20 is a digital
• DHT11 Temp and humidity sensor
• NTC and ADC

Pressure

Some Sensors available

Prefer a tubed version!

• MPRLS Ported Pressure Sensor: Attach a tube on it. I2C
• SCP1000 Pressure sensor breakout board
• BMP180
• GY-BMP280
• BME680
• MPS20N0040D Pressure Transducer

LidaR TF03

TF (ToF; Time of Flight). https://www.sparkfun.com/products/19421

• Range ~100 m
• Resolution ~0.01 m/ Accuracy 0.1 m.
• Frame rate 1Hz - 1000 Hz
• wavelength: 905 nm. Laser class 1 (IEC 60825)
• Angle 0.5 deg; Spot size @100 m 28x28 cm2.
• Current ˝200 mA. Power ~1W
• Dimensions 44x43x32 mm3.
• Weight 77g
• IP67
• Connector: Molex SD-51021-007 (1.25 W/B) 7 pin or mh1.25-7p. Identity electrical connectors: https://core-electronics.com.au/guides/Identify-Electrical-Connectors/#Molex

See more

• https://cdn.sparkfun.com/assets/2/c/5/6/0/Benewake_10152020_TF03_100-1954064.pdf
• https://cdn.sparkfun.com/assets/4/e/5/b/5/PM-15180.pdf

Need to measure angle. Use an accelerometer

Laser safety.