for example one microprocessor with accompanying memory and which is allocated the following additional functional elements clock 9 with alarm function hygrometer 12 outside temperature sensor 10 barometer 13 inside temperature sensor 11 input unit 14 the above functions can also be partially realized by software in the control unit 8 for example the clock and alarm function 9 a special feature of the projection alarm clock 1 is that several values or data items can be displayed simultaneously on the projection surface 2 as indicated by the surfaces 15 18 in the drawing for example the time alarm time the date the inside outside temperature and the humidity weather symbols e g for a weather forecast the projection unit 3 and in particular also the optical unit 5 are designed such that the values 15 18 are projected in different axis directions so that these values are simultaneously displayed next to each other on the projection surface 2 the embodiment according to the invention avoids projectors or rotatable components of such projectors so that the projection alarm clock 1 is characterized by a particularly simple and also reliable construction the light source which is likewise controlled by the control unit 8 is preferably a multi color led so that by corresponding input at the input unit 14 it is possible to set the color of the values data or images displayed by means of projection.