AZDelivery MQ-135 gas sensor air quality module compatible with Arduino including e-book (English language not guaranteed) : Amazon.de: Computer & Accessories
Markenlos Kit LED interchangeable indicators : Amazon.de: Toys & Games
RS PRO Draht-Stellwiderstand Rheostat, 1.5kΩ 180W 5% : Amazon.de: Business, Industry & Science