CN201569875U - Electronic second watch alarm clock - Google Patents

Abstract

The utility model discloses an electronic second watch alarm clock, including a power supply, which is connected with a multiresonant oscillation circuit and a loudspeaker in parallel and is then connected with a singlechip in series, the singlechip is also connected with a display screen, the display screen is provided with a multifunctional conversion key, an upper regulating key and a lower regulating key. The singlechip is a CMOS 8-bit singlechip containing at89c2051. According to the electronic second watch alarm clock, the singlechip is respectively connected with the multiresonant oscillation circuit and the display screen, the time and the alarm watch are regulated by the multifunctional conversion key, the upper regulating key and the lower regulating key, the time is alarmed by the loudspeaker, and the utility model has advantages of simple structure and easy use.

Description

The electronic stopclock alarm clock

Technical field

The utility model belongs to the single-chip microcomputer applied technical field, relates to a kind of electronic stopclock alarm clock.

Background technology

Single-chip microcomputer has been subject to people's attention and has paid close attention to extremely high cost performance since coming out the seventies in 20th century, so application is very wide, develops very fast.The advantage of single-chip microcomputer is that volume is little, in light weight, antijamming capability is strong, and is not high to environmental requirement, cheap, the reliability height, and dirigibility is good, develops more or less freely.In China, single-chip microcomputer has been widely used in various aspects such as industrial automation control, detection automatically, intelligence instrument, household electrical appliance.The existing common structure of structure that realizes the electronic stopclock alarm clock by single-chip microcomputer is more complicated all, generally all comprises compositions such as zero clearing reset circuit, multi-resonant oscillating circuit, branch frequency counting circuit, decoding display circuit, implements cumbersome.

Summary of the invention

The purpose of this utility model provides a kind of electronic stopclock alarm clock, has the function of stopwatch and alarm clock, and simple in structure.

The technical scheme that the utility model adopted is, a kind of electronic stopclock alarm clock comprises power supply, and power supply is connected with single-chip microcomputer respectively with after multi-resonant oscillating circuit, the loudspeaker parallel connection again, single-chip microcomputer also is connected with display screen, and display screen is provided with multi-functional shift key, raises key, down key.

Feature of the present utility model is that also single-chip microcomputer adopts the CMOS8 position single-chip microcomputer of at89c2051.

A kind of electronic stopclock alarm clock of the present utility model, single-chip microcomputer is connected with multi-resonant oscillating circuit and display screen respectively, carries out timing and order alarm watch, give the correct time by loudspeaker by the multi-functional shift key, rise key, the down key that are provided with on the display screen, simple in structure, easy to use.

Description of drawings

Fig. 1 is the electrical block diagram of a kind of electronic stopclock alarm clock of the utility model.

Wherein, 1. power supply, 2. multi-resonant oscillating circuit, 3. loudspeaker, 4. single-chip microcomputer, 5. display screen, 6. multi-functional shift key 7. raises key, 8. down key.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

The circuit structure of a kind of electronic stopclock alarm clock of the utility model, as shown in Figure 1, comprise power supply 1, power supply 1 is connected with single-chip microcomputer 4 respectively with after multi-resonant oscillating circuit 2, loudspeaker 3 parallel connections again, single-chip microcomputer 4 also is connected with display screen 5, also is respectively arranged with multi-functional shift key 6 on the display screen 5, raises key 7, down key 8.

Wherein, single-chip microcomputer 4 adopts 8 single-chip microcomputers of at89c2051 high-performance CMOS.

The course of work of the utility model electronic stopclock alarm clock is, power supply 1 is a circuit supply, when for the first time pressing multi-functional shift key 6, enter into the reading the clock state on the display screen 5, be in waiting status herein, when pressing rise key 7, begin to run second, stop in the time of once more by this key running second,, enter waiting status once more when pressing down key 8 screen zero clearings.After pressing multi-functional shift key 6 for the second time, enter the timing state, by adjusting minute by raising key 7, down key 8, press multi-functional shift key 6 for the third time after, be provided with hour.After pressing multi-functional shift key 6 the 4th time, enter the alarm clock state that is provided with, by raise key 7, down key 8 is adjusted alarm time.Press multi-functional shift key 6 at last and enter into the clock display interface.When arriving set time of reserving, just give the correct time by loudspeaker 3.

Claims (2)

1. electronic stopclock alarm clock, it is characterized in that, comprise power supply (1), power supply (1) is connected with single-chip microcomputer (4) respectively with after multi-resonant oscillating circuit (2), loudspeaker (3) parallel connection again, single-chip microcomputer (4) also is connected with display screen (5), and described display screen (5) is provided with multi-functional shift key (6), raises key (7), down key (8).

2. electronic stopclock alarm clock according to claim 1 is characterized in that, described single-chip microcomputer (4) adopts the CMOS8 position single-chip microcomputer of at89c2051.

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