Coffee machine mechanical controls and displays guide the brewing process and prevent problems. A block diagram shows electronic solutions Littelfuse provides for these functions. Our reed sensors and reed switches detect carafes, lid position, and water levels. Our TVS diodes and TVS diode arrays prevent shocks and protect LED or LCD displays from voltage surges while preserving signal integrity.

Viewing a coffee machine motherboard block diagram makes it look like brewing great coffee is, in fact, rocket science. The printed circuit boards have evolved into interconnected integrated circuits that include microcontrollers, solid state relays, and resettable PPTC devices for overcurrent protection. Littelfuse makes all those components, as well as TVS diodes for overvoltage protection.

As a simplified block diagram shows, a complex system of pumps, motors, and heaters allows coffee makers and espresso machines to grind beans, brew, and foam milk. Each electronic component requires rectifiers, solid state switches, contactors, and temperature sensors. Littelfuse produces those solutions, as well as fuse holders that withstand high humidity.