Adafruit
PM2.5 Air Quality Sensor and Breadboard Adapter Kit - PMS5003 (ID: 3686)
£32.78£43.00Unit price /UnavailablePololu
2.5-9V Fine-Adjust Step-Up/Step-Down Voltage Regulator w/ Adjustable Low-Voltage Cutoff S9V11MACMA
£13.34£17.15Unit price /UnavailablePololu
5V Step-Up/Step-Down Voltage Regulator w/ Adjustable Low-Voltage Cutoff S9V11F5S6CMA
£14.40Unit price /Unavailable