DE19543586B4 - Radio clock with analog time display - Google Patents

Abstract

Radio clock with analog time display
with a first stepper motor drive (12) for the second hand (6),
with a second stepper motor drive (13) for the minute and hour hands (7, 8),
with a first hand position detection for the second hand (6),
with a second hand position detection for the minute and hour hands (7,8),
with a time memory (22) as well
with a quartz control circuit with a microcomputer (10) for the control,
characterized,
an alarm time device is provided for setting an alarm time and for outputting a wake-up signal when the alarm time is reached,
that for setting the alarm time, a manually operable, electrical switch (19) and a Weckzeitpeicher (23) are provided by means of which by means of a pulse generator higher frequency of the first stepper motor drive (12) for positioning the second hand (6) on the wake-up time is actuated, and
that the second hand (6) remains in its alarm time position during the alarm readiness.

Description

The The invention relates to a radio clock with analog time display after Preamble of claim 1.

It are electrical radio alarm clock with analog time display known, which has a electromechanical alarm signal tripping device. It are also electronic radio alarm clock with digital display of the time known to which a digital electronic alarm signal triggering device assigned.

For alarm clocks and thus also radio alarm clock is, however, more and more again the Analog display with seconds, minutes and hours by hands preferred, because this abruptly the reading of the usual classical Display image of the analog hand-time display allows which one instantaneous, intuitive time reading allowed. This is special for the Time reading during the night hours of interest or importance. Besides that is this display system cheaper.

The DE 38 28 810 A1 shows a device for display position detection for an analog electric clock, in particular for a radio-controlled clock, the type specified. For this purpose, two separate servo motors are provided, each with a control gear. The hour and minute wheels are driven by a common stepper motor, while the second wheel is driven by its own stepper motor. A light barrier system is used for pointer detection. A wake-up device does not have this radio clock.

Of the Article by H. Effenberger "Microprocessor controlled Radio clock with analog display "in the magazine "radio clocks", publisher: W. Hilberg, Oldenbourg Verlag 1983, pages 104-109 mentioned that radio clocks an alarm function can own.

The US 4,470,707 shows a clock with analog time display with a wake-up timer. The basic principle is that the user first operates a switch to set the alarm time so that the second hand is moved to the 0 o'clock position where previous wakeup data is cleared. Then, the alarm time can be adjusted by turning the crown of the clock. The consequence of this is that the minute hand of the watch is advanced and acts as an hour hand for the alarm time. After a further triggering by the crown, the minute hand can be used to set the minute display of the alarm time, so that this second hand acts as the minute hand for the alarm time. After pressing the switch again, the alarm time is stored, and the clock resumes normal operation with its hour hand, minute hand and second hand, by moving the aforesaid hands back to their desired display position.

Of the Invention is based on the object at a radio alarm clock with analog Time display of the type specified on the one hand, the setting of To simplify wake-up time and on the other hand to create a possibility that during the Alarm of the radio alarm clock of the fucking second hand sleeper does not bother acoustically.

The technical solution is characterized by the features in the characterizing part of claim 1.

Thereby is a radio alarm clock created with analog time display, which On the one hand distinguished by the fact that the alarm time is very simple can set, and which is characterized by the fact that he sleeps during the Alerting the radio alarm clock not by a ticking second hand disturbs. The basic idea of the radio alarm clock according to the invention is that the Alarm time device is technically very simply realized by by means of a switch, the stepper motor drive, which the second hand is assigned, actuated and the second hand is thereby positioned at the wake-up time becomes. The radio alarm electronics store this alarm time position and then gives a signal when the alarm clock is the corresponding one Has reached time. The peculiarity of this invention Weckzeiteinrichtung insists on it addition, in that the Second hand in the alarm ready position in its alarm time position remains, d. H. no further ticking. This has two advantages. On the one hand, the alarm is activated with the set alarm time displayed, on the other hand, the second hand is not ticking, so he no disturbing Sounds emits.

The radio alarm clock according to the invention has a number of advantages:
Thus, the alarm clock setting by the second hand can be made precisely on a minute line of the dial, ie the alarm time can be set from 12 to 12 minutes. The triggering of the wake-up signal takes place to the second. The image of the analog time display is not affected in its reading by a disturbing alarm clock hand. Incorrect readings of the time display are excluded.

The The invention is illustrated in the accompanying drawings and will explained in detail in the following description. It demonstrate:

1 a schematic representation of the radio alarm clock according to the invention in the form of a block diagram;

2 the movement of the radio alarm clock according to the invention in a schematic representation.

In 1 is a pointer work 1 indicated for the second display on the one hand and for the minute display with the hour display on the other hand. Via concentric pointer waves 2 . 3 . 4 become the second hand arranged on the latter 6 , Minute hand 7 and hour hand 8th emotional.

The pointer shaft 2 is powered by a stepper motor drive 12 powered for the seconds while the pointer waves 3 . 4 from a stepper motor drive 13 for the minutes and hours each over connection waves 16 . 17 are driven.

The stepper motor drives 12 . 13 be through a microcomputer 10 controlled. The microcomputer 10 consists of the microprocessor and the necessary memory peripherals, which are not shown in detail. They represent insofar part of the microcomputer 10 represents.

The microcomputer 10 is made by a watch quartz 15 which also controls the time base for the microcomputer 10 with integrated quartz control circuit, which is responsible for the timing of the seconds, minutes and hours display.

A (snooze) switch 18 and a (set) switch 19 , which are used to initiate and handle control and switching operations in the circuitry of the radio alarm clock according to the invention are with the microcomputer 10 connected. The microcomputer 10 is further provided with an electronic wake-up signal control circuit 20 linked by an electronic time memory 22 and an electronic alarm timer memory 23 is formed. Save both 22 . 23 is an electronic comparator circuit 24 . 25 assigned, which via the wake-up signal control circuit a wake-up signal generator, z. B. a buzzer controls.

The electronic assemblies 22 . 23 . 24 are useful in the periphery of the microcomputer 10 included.

A clockwork 30 of the radio alarm clock that is in 2 is shown, consists of a housing 31 with a battery holder 32 and a back 33 which z. B. by a conductor track side 36 a printed circuit board 34 can be formed. On this printed circuit board 34 can be beneficial the two switches 18 . 19 and if necessary, be arranged further, which may be formed as a so-called rubber buttons or click switch.

The clockwork 30 initially works in normal operation of the radio alarm clock every second, which by the quartz control circuit (microcomputer 10 , Quartz watch 15 ) of the radio alarm according to the invention is predetermined. The drive of the clockwork 30 is through the stepper motor drives 12 . 13 made, each under the control of the microcomputer 10 ,

It suppose that the alarm clock is set no alarm time yet.

By pressing the switch 19 for a few seconds (3 to 5 seconds) is now the stepper motor drive 12 for the seconds from the normal second clock of the quartz control circuit switched to a pulse generator of higher frequency, which also by the microcomputer 10 is formed. The operating time of 3 to 5 seconds can easily be on the second hand 6 be read. The second hand 6 runs thereby in the overdrive on and that with a frequency of approx. 16 to 20 Hz and becomes by the microcomputer 10 in his position "0/12" on the second hand detection, which is not shown, but state of the art, detected and complied with.

By pressing the switch again 19 - either constantly overdrive or momentarily single steps - becomes the second hand 6 set to the desired alarm time on the clock face of the radio alarm clock. This corresponds to one revolution of the second hand 6 on the dial 12 Hours, ie one second step covers 12 minutes. The second hand thus replaced in this setting mode for the alarm so to speak, the classic alarm clock pointer an alarm clock, in particular a radio alarm clock, with electromechanical alarm signal triggering device.

The individual steps, which of the second hand 6 have been completed until reaching the set alarm time, are simultaneously in an addition memory of the microcomputer 10 stored. The second hand 6 can be adjusted by a maximum of 60 steps, ie a maximum of 12 hours on the dial, during the alarm signal setting, calculated from the "0" or "12" position. Will the second hand 6 deliberately or accidentally adjusted by more than 60 steps, so begins in this embodiment of the invention with the repeated passage of the position "0/12" the Counting in the alarm time to be set again.

The set wake-up signal would be given on virtually every 12-hour alarm in each 12-hour cycle of the 24-hour day, ie 3 o'clock in the afternoon and 3 o'clock in the morning or 11 o'clock in the morning and 11 o'clock in the evening, etc. By appropriate operation an alarm switch 21 In this case, the respective unwanted wake-up signal in a 12-hour cycle can be prevented in a known manner.

• 1. Multiplikation der Anzahl der im Additionszähler des Mikrocomputers 10 erfaßten Einstellschritte mit 12 Minuten;
• 2. Division des Minutenproduktes durch 60 unter Beibehaltung der Restminuten;
• 3. Übertragung des Quotienten Stunden und Restminuten auf den Weckzeitspeicher 23 des Mikrocomputers 10.

Now the switch is activated ("Snooze") 18 , whereby the counting in the alarm time memory 23 fixed or in the microcomputer 10 is taken over. Then the second hand moves 6 under the influence of its increased frequency operated stepping motor drive 12 in the overdrive until it reaches the current pointer state provided by the quartz control circuit. The overdrive is canceled, and the stepper motor drive 12 with the second hand 6 moved in the second step. By pressing the switch 18 In detail, the following calculation steps are performed by the microcomputer 10 performed:

• 1. Multiplication of the number of times in the addition counter of the microcomputer 10 recorded adjustment steps with 12 minutes;
• 2. Division of minute product by 60 while retaining the remaining minutes;
• 3. Transmission of the quotient hours and rest minutes to the alarm time memory 23 of the microcomputer 10 ,

It is intended that the second hand 6 under the influence of its drive leaves its setting position on the dial to determine the alarm time and then returns in the manner described to display the current time in the second cycle, if within 8 seconds after the setting of the second hand 6 on the alarm time concerned the switch 18 should not have been pressed. The on the accumulation memory previously through the switch ("Set") 19 entered alarm time is automatically deleted in this case again.

It is also provided that the second hand 6 its setting to the position "0/12" automatically leaves again and accelerates to the current second display continues, if another operation of the switch 19 for setting the second hand 6 should be left to the alarm time.

The stepper motor drive 13 of the minute hand 7 and the hour hand 8th remains unimpaired in the described setting process, ie the time display after minutes and hours is also continued during the control measure on the radio alarm clock according to the invention and thereafter.

At a later check of a set alarm time, either the switch will be activated 19 a few seconds (3 to 5 seconds) or the associated alarm switch 21 actuated. Then the second hand turns 6 in the overdrive automatically on the alarm, so that the set alarm time can be checked or determined.

According to one embodiment of the invention, such an arrangement can be selected that after actuation of the alarm switch 21 for establishing the wake-up readiness of the second hand 6 in overdrive, it runs to the previously set alarm time and stays there until the alarm switch is opened 21 Then, after the alarm has been switched off, the current second display will be replayed in overdrive and then progressed every second.

By pressing the alarm switch 21 the wake-up of the radio alarm clock is established. By after the operation of the alarm switch 21 second hand set to the alarm time 6 Both the Arlarm time point and the existing alarm time will be displayed.

The completion of the alarm signal is either by the wake-up signal control circuit 20 in time dependence or by operation, ie opening the alarm switch 21 initiated.

It would also be possible to develop the radio alarm clock according to this embodiment such that the second hand 6 after the wake-up signal has occurred, it only lingers briefly on the alarm time display, but then, in the overdrive, it continues to hurry back to the current time display and then progresses in the regular second-second cycle.

The deletion of an alarm time set on the radio alarm clock always takes place when the switch is on 19 and the switch 18 have been pressed to enter a new alarm time.

According to an appropriate training be during overdrive, ie when the stepper motor drive 12 is switched for the seconds to a pulse generator higher frequency than the second clock, conditional criteria, such. B. battery voltage, reception quality of the incoming time signal for the radio alarm clock etc. from the associated microcomputer 10 detected and in the form of clearly visible irregularities in the step frequency of the progressive second hand 6 shown.

In the 1 shown illustration of elek tronic wake-up signal control 20 with their assemblies 22 . 23 . 24 is of more symbolic nature and serves more to explain. The function of this alarm signal control 20 is essentially by the microcomputer 10 taken over and in this, z. B. via the associated software handled.

According to one appropriate embodiment of Funkweckers is the setting and the administration of one or several more wake-up signals or alarms provided. It exists so the possibility during the course of a 12-hour cycle two or more presettable To give wake-up signals.

For the setting of a second alarm time is now the alarm signal control circuit 20 the radio alarm clock or its setting mode for this second alarm time by appropriate expansion of the storage capacity and by programming the microcomputer 10 designed such that after the summation of the adjustment steps of the second hand 6 on the addition counter and the assumption of its count, after appropriate conversion on the microcomputer 10 , in a first alarm clock memory 23 by the operation of the switch 18 the second hand 6 does not immediately advance to the current second display, but first automatically returns to the position "0/12" clock.

Now set the second alarm time, again by pressing the switch 19 , either by continuous operation and / or individual keys. The transfer of the accumulated sum of the setting steps of the second hand accumulated on the addition counter 6 to the second wake-up memory 23 of the microcomputer 10 - After conversion by this - is also done by pressing the switch 18 ,

Then the second hand hurries 6 back to the current second time and then progresses every second. If no second alarm time has been entered, the second hand will run 6 after some time automatically from the position "0/12" clock on the current seconds display and then proceeds with this.

Will then the alarm switch 21 closed to make the alarm, the second hand runs 6 first accelerates to the position of the first wake-up time and, if this time has already elapsed, to the position of the second wake-up time.

After the end of the execution of the alarm corresponding to the first alarm time, the second hand becomes 6 through the microcomputer 10 automatically continued to the position of the second alarm time.

If no second alarm time has been entered, the second hand will run 6 accelerated again to the current time, then progressing by the second. This shutdown of the first alarm is carried out either automatically by the alarm signal triggering device or by manual operation of the alarm switch 21 , The same applies to the shutdown of a second alarm.

Is the second hand 6 on the first alarm time and if you want to skip this or if you want to display or change the second alarm time, then the alarm switch 21 short open. This causes the second hand to move to the position of the second alarm time. Then the alarm switch 21 pressed again, and the second alarm time is thereby activated preparatory.

Will the alarm switch 21 but not closed, the second hand runs 6 after a waiting period of z. B. 8 seconds automatically in the position of the current seconds display and then progresses every second.

By an associated small switch or by bond option is the Selection between the operating version of the radio alarm clock with one or possible with two alarm times. Under bond option becomes the possibility understood, by re-soldering on pins from pins of a chip or to tracks connected to the pins to select a specific operating version of the radio alarm clock.

According to one embodiment of the invention, it is possible to set the setting of further alarm times on the radio alarm clock, if this should be desired by the user. On the the microcomputer 10 associated electronic memories are of course the necessary storage capacities available for this purpose. When changing one of the set alarm times, it is always necessary or necessary to readjust the other set alarm time.

For the intended Operating version of the radio alarm clock with two adjustable alarm times would it be for one possible design as a timer useful, a pulse-free Alarm output available to have. Whose electronics could then be so designed that the output will be alarmed for the first one Alarm time active and alarm for the second alarm time becomes inactive again. This could be opened up simple way diverse handle or manage chronometrically controlled circuit tasks. The radio alarm clock could as a timer for find the most diverse purposes use.

To control the alarm time set on the alarm clock, only the alarm switch is active 21 close. The second hand is positioned at each press on the next set alarm time. After interruption of the alarm switch 21 and its renewed operation leads the second hand 6 in the position of the next, ie second wake-up time and immediately.

at the previously described arrangements of the radio alarm clock is - as already explained - the setting alarm time limited to a 12-hour cycle. To disturbing wake-up signals in the other 12-hour cycle to stop is the operation of the Alarm switch 21 at the appropriate time required, z. For example Beginning of the night hours.

According to a further expedient embodiment of the radio alarm clock, it is therefore possible to assign this a 24-hour wake-up: For this purpose, a corresponding embodiment of the control algorithm of the microcomputer 10 or a correspondingly extended interpretation of its software required.

This makes it possible, on the addition memory, a maximum of 2 × 60 = 120 setting steps of the switch 19 enumerate so that a setting of the second hand 6 to enter the alarm time by a maximum of 2 × 12 = 24 hours on the dial can be done.

By pressing the switch 18 becomes the count of the addition counter after appropriate conversion by the microcomputer 10 on its wake-up memory 23 transfer.

It Now the alarm time range will be 24 hours in two 12-hour intervals whose first range is the hours from 00h to 12h and its second range is the hours from 12 o'clock to 24 o'clock include.

To set alarms, which are in the range of hours from 00 o'clock to 12 o'clock, the second hand completes 6 at the alarm time setting a rotary movement of max. 60 steps. So z. For example, to set the alarm time to 7:00 am, follow 35 steps on the second division of the dial from the second hand 6 by appropriate actuation of the switch 19 to cover.

On the other hand, for the setting of alarm times, which are in the range of hours from 12 o'clock to 24 o'clock, by the second hand 6 a rotary movement on the dial from 60 to max. 120 steps to complete. So z. For example, to set the alarm time to 16:00, a total of 60 + 4 × 5 = 80 setting steps on the dial of the second hand 6 by pressing the switch 19 to cover.

Advantageously, the arrangement is designed according to the invention such that in each case when exceeding one of the 12-hour periods of the electronics of the wake-up signal control circuit 20 the radio alarm clock after 60 setting steps on the associated electric wake-up signal generator a short, acoustic attention signal is administered, as an indication of the just setting the alarm time making user.

So it is useful at the passage of the position 12 o'clock at the second hand 6 an acoustic pulse is given by the electronics, whereas the passage of the position is 24 o'clock after 120 steps of the second hand 6 two acoustic pulses or a longer pulse are initiated.

This be an example of actuation explains:

Current time 16.00 Clock

There was no alarm time saved yet. When you press the switch 19 over more than z. B. The second hand runs for 3 to 5 seconds 6 to the position "0/12"o'clock. Now becomes the second hand 6 by further actuation of the switch 19 set to 6 o'clock = 30 second steps, then the set alarm is applied at 6.00 o'clock.

However, if you want to set the alarm time at 4:00 pm to 6:00 pm at night, you will pass the switch by setting the alarm time 19 the 6 o'clock position on the dial, ie the second hand 6 is presented by 60 + 30 steps.

Also in this embodiment, the number of setting steps becomes the second hand 6 on the addition counter of the microcomputer 10 summed up. This is the microcomputer 10 the radio alarm gives the criterion that the alarm time to be adopted is relevant when the 6 o'clock position is started by the movement of the radio alarm clock according to the invention for the second time.

Now the alarm switch 21 closed at any time for control or preparatory activation of the radio alarm, the second hand moves 6 to the previously set alarm time. One recognizes then at the number of the second hand then 6 whether the alarm will be within the range of 00h to 12h or within the range of 12h to 24h until the set alarm time is reached. Full pulls namely the second hand 6 less than 60 steps in this process, the alarm will be transmitted for a set alarm time between 00:00 and 12:00. Completes the second hand 6 however, more than 60 steps, ie more than one complete revolution on the dial, the alarm is given for a set alarm time within the time range from 12 o'clock to 24 o'clock.

Appropriately, the administration of a short acoustic signal by the wake-up signal generator can be provided as soon as the second hand 6 in its continuation to display the alarm time and the alarm clock the position 12 Clock exceeds 60 steps, that is, when the alarm time is set in the second 12-hour period.

Wake up time 7.00

Of the Second hand is running at 7:00 pm at the wake-up time and stops there until the alarm goes off 7.00 clock is finished. Then again until 19.00 o'clock the seconds displayed.

For use 24-hour wake-up system, a 24-hour off button is convenient.

By Bond option can alternatively be used between a functionality Choose 12-hour or 24-hour wake-up system.

In the above-described radio alarm clock, the second hand is 6 Adjustable to 60 individual steps along the periphery of the dial, ie at intervals of 12 minutes to 12 minutes.

For some Users of such a radio alarm may like such a subdivision something too inaccurate.

According to a possible development, an embodiment is proposed, which is a resolution of the adjustability of the alarm time by the second hand 6 from 6 minutes to 6 minutes.

For this purpose, the radio alarm clock is modified so that every second step of the second hand 6 two actuation pulses of the switch 19 assigned.

The first time the button is pressed, the alarm time on the assigned counter memory is incremented by 6 minutes, but without the second hand 6 initially moved. At the second press of the button, the alarm time is then incremented by another 6 minutes on the counter memory and only then the second hand 6 is moved by 1/60 of the second scale, ie by one second step.

To avoid irritation of the user in the setting process, each press of the button on the switch 19 confirmed by a short beep on the alarm clock of the radio alarm clock.

This resolution of the adjustability of the wake-up time steps from 12 minutes to 6 minutes is achieved by a suitable design of the electronic circuit, in particular the software of the microcomputer 10 reached. Any mechanical changes of the radio alarm clock are not required here.

For this Let us now give the following setting examples:

1. desired alarm time: 6.12 clock

The desk 19 is pressed for more than 3 - 5 seconds. A short acoustic signal is given as a receipt on the wake-up signal generator, and the second hand 6 in overdrive mode, it moves to the "0/12" clock position or to an alarm time set in advance.

Either by a long press or by a single operation of the switch 19 becomes the second hand 6 set to 6:00 on the second scale.

Two more operations of the switch 19 add 2 × 6 = 12 minutes. This is where the second hand moves 6 only at the second key press a second step further.

By subsequently pressing the switch 18 the time "6, 12" from the counter memory on the microcomputer 10 accepted.

Then the second hand moves 6 in the usual way in the overdrive on the current second on, and then progress again every second.

2. Desired alarm time: 6.30 am

The desk 19 will be pressed again for more than 3 - 5 seconds. A short signal sounds again as confirmation, and the second hand 6 in overdrive mode it runs to the position "0/12" clock or to an already set alarm time.

By prolonged pressing or by single operation of the switch 19 becomes the second hand 6 set to two divisions after 6:00, which is corresponds to an alarm time of 6.24 o'clock.

Another operation of the switch 19 adds 6 minutes without the second hand 6 here again moved.

By subsequently pressing the snooze button 18 then the time is 6:30 as an alarm in the microcomputer 10 accepted.

A subsequent recall of the set alarm time takes place as already described above. This is the last intermediate step of 6 minutes by the second hand 6 no longer displayed. However, this last intermediate step could be characterized by a short beep. The user of the alarm clock would be instructed by the second hand 6 displayed alarm time to add the interim time of 6 minutes.

1

Movement

2

pointer shaft

3

pointer shaft

4

pointer shaft

6

Second hand

7

Minute-hand

8th

Hour hand

10

microcomputer

12

Stepper motor drive

13

Stepper motor drive

15

quartz watches

16

connecting shaft

17

connecting shaft

18

switch

19

switch

20

AC signal control circuit

21

alarm switch

22

time memory

23

Weckzeitspeicher

24

comparator

25

comparator

30

clockwork

31

casing

32

battery tray

33

back

34

circuit board

36

Conductor side

Claims (9)

Radio clock with analog time display with a first stepper motor drive ( 12 ) for the second hand ( 6 ), with a second stepper motor drive ( 13 ) for the minute and hour hands ( 7 . 8th ), with a first hand position detection for the second hand ( 6 ), with a second hand position detection for the minute and hour hand ( 7 . 8th ), with a time memory ( 22 ) and a quartz control circuit with a microcomputer ( 10 ) for the control, characterized in that an alarm time means for setting an alarm time and for delivering a wake-up signal upon reaching the alarm time is provided that for setting the alarm time, a manually operable, electrical switch ( 19 ) as well as a wake-up time memory ( 23 ) are provided, by means of which by means of a pulse generator of higher frequency of the first stepper motor drive ( 12 ) for positioning the second hand ( 6 ) is operable on the wake-up time, and that the second hand ( 6 ) remains in its alarm time position while the alarm is ready. Radio clock according to the preceding claim, characterized in that for switching back the stepper motor drive ( 12 ) for the second hand ( 6 ) to the second clock of the quartz control circuit a second switch ( 18 ) is provided. Radio clock according to claim 2, characterized in that the second switch ( 18 ) is a snooze switch of the radio clock. Radio-controlled clock according to one of the preceding claims, characterized in that the second hand set to the wake-up time ( 6 ) by pressing the switch again ( 19 ) or one from the microcomputer ( 10 ) certain time period on the valid creep of the quartz control circuit in overdrive is feasible and the stepping motor drive ( 12 ) of the second hand ( 6 ) can be switched back to the normal second clock of the quartz control circuit. Radio clock according to one of the preceding claims, characterized in that in the wake-up time memory ( 23 ) stored alarm time is erasable again. Radio-controlled clock according to one of the preceding claims, characterized in that the setting of the desired wake-up time on the dial by the second hand ( 6 ) separated by hours and minutes, can be successively arranged in chronological order, that for each of these setting operations for hour and minute the switch ( 19 ) can be actuated, that any adjustment of the second hand ( 6 ) by actuating a second switch ( 18 ) on the microcomputer ( 10 ) and that when an alarm switch ( 21 ) after setting the alarm time, first the second hand ( 6 ) by the microcomputer ( 10 ) to the value of the pre-set minute and then to one of the microcomputer ( 10 ), the set alarm time as close as possible indicating value on the dial for hours and minutes can be continued, which is maintained until the alarm signal. Radio-controlled clock according to one of the preceding claims, characterized in that the division of the wake-up time memory ( 23 ) for the microcomputer ( 10 ) is designed so that per hour ( 10 ) Alarm time settings are provided in each case 6 minutes, whereby with each actuation of the switch ( 19 ) the addition counter by one step, the second hand ( 6 ), however, only after every second Actuate supply step of the switch ( 19 ) are advanceable by one second step on the dial. Radio-controlled clock according to Claim 7, characterized in that with each actuation of the switch ( 19 ), which has counts for the addition counter result, a short-term acoustic pulse can be issued as an acknowledgment signal via an associated acoustic signal generator. Radio clock according to claim 8, characterized that the Acoustic signal transmitter by a wake-up signal transmitter of the radio clock is formed.