Abstract: With the system the movement a solenoid valve valving member is damped both during opening and during closure by delaying pulses applied during the movement of the valve mobile member, to reduce end-of-travel impact both during opening and during closure, and to reduce vibration and noise.

Abstract: An atmospheric burner is associated with a flame presence sensor and an electrical-discharge ignition device. It is fed via a flow rate control device. Both the ignition device and the flow rate control device are controlled by a microcontroller. A user interface enables the user to select the desired power by sending to the microcontroller a request for altering the flow rate and hence for altering the minimum power deliverable by the burner.

Abstract: A device for controlling the operation of a refrigeration appliance such as a domestic refrigerator consists of a circuit (2) comprising a plurality of resistive elements (3, 4, 5, 6) for generating reference signals (V.sub.A) to be compared in a comparator (18) with analog signals (V.sub.R) originating from a plurality of temperature sensors (21). The resistors have adjustable characteristics and are activated sequentially by a sequencer circuit (16) which also controls the supply of data (V.sub.C) derived from said comparisons into a memory (26, 27, 28). The sequencer circuit is connected to a control unit (35) for controlling the refrigeration appliance. The control unit reads the data from the memory at the end of each sequence of comparisons between the reference signals (V.sub.A) and the signal (V.sub.R) from the sensors, and on the basis of the data read out operate on the usual components (42, 43, 44) of the refrigeration appliance which generate and control its temperature.