Abstract: The invention is a print head for a thermal printer having a print region, a plurality of heating elements arranged in the print region, and actuating electronics by which the heating elements can be actuated. One or more additional heating elements are arranged outside the print region, wherein at least one of the additional heating elements has a property, that differs from a normal property, of the heating elements arranged in the print region. There is included a method for production of the print head. The device electronics further comprises a testing circuit for verification of the print head, in which the print head has one or more additional heating elements whose properties differ in regard to at least one normal property of the heating elements and the testing circuit for verification of the print head is designed to check this property at least on some of the heating elements.

Abstract: The present infra-red remote control transmitter understands external formats, and those with toggle-bits and different carrier frequency ranges, and transmits signals in these data formats to the appropriate devices, with or without a toggle-bit. The remote control receives and transmits infra-red formats and comprises an infra-red receiver with a microprocessor and/or with two carrier frequency oscillators to generate two modulation frequencies, in which case it is provided with two infra-red receivers. An externally formatted data word with toggle-bits is subjected, after being read at least twice, to a comparison inside the microprocessor, from which the presence of toggle-bits, their number, position and the carrier frequency of the data word are found.