June 2019

Environment Sensor BME680


Bought a Bosch BME680 which measures VOCs(Volatile Organic Compounds) such as paints, chemicals and glues.

John S. is interesting in an LPG detector. Here is a chart describing various categories of gas sensors


MQ–2 Methane, Butane, LPG, smoke MQ–3 Alcohol, Ethanol, smoke MQ–4 Methane, CNG gas MQ–5 Natural gas, LPG MQ–6 LPG, Propane, Butane MQ-7 Carbon Monoxide MQ-8 Hydrogen MQ–9 Carbon monoxide, Flammable Gasses MQ–131 Ozone MQ–135 Benzene, Alcohol, Smoke MQ–136 Hydrogen Sulfide MQ–137 Ammonia MQ–138 Benzene, Toluene, Alcohol, Acetone, Propane, Formaldehyde, Hydrogen MG-811 Carbon Dioxide

Different types of gas sensors:

Gas sensors

INA260 current sensor

Rob C. show and tell

Told as about practical Raspberry Pis on the shop floor. He also described his boiler/steam engine project.

Comfile Board

128x128 colour tft-lcd display for arduino

Jaycar DuinoTech job.

Based on ST7735.

Apparently, there is a rpi library