CN219418003U

CN219418003U - Plate calendar clock circuit

Info

Publication number: CN219418003U
Application number: CN202223248516.7U
Authority: CN
Inventors: 周华根
Original assignee: Guangzhou Chihai Electronic Co ltd
Current assignee: Guangzhou Chihai Electronic Co ltd
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-07-25
Anticipated expiration: 2032-12-05

Abstract

The utility model relates to the technical field of clocks, in particular to a plate calendar clock circuit; the intelligent temperature sensor comprises an external temperature sensor, a main control board, a clock chip and a display module, wherein a first end and a second end of the temperature sensor are respectively connected with a battery anode and a battery cathode, a data output end of the temperature sensor is connected with a light emitting diode output end of an optical coupler, a power supply anode access end of a Schmitt trigger of the optical coupler is connected with a VCC pin of the main control board, a T2EX pin of the main control board is respectively connected with a second end of a second resistor and a Schmitt trigger output end of the optical coupler, and the main control board is connected with the display module through a flat cable; the temperature sensor is arranged, the temperature can be sensed and displayed on the calendar clock through the display module, and because the electric signal of the temperature sensor is isolated from the main control board by adopting the optical coupler, the calendar clock body is not damaged even if the calendar clock body is subjected to thunder and lightning when the calendar clock is arranged outdoors, and the calendar clock has higher safety.

Description

Plate calendar clock circuit

Technical Field

The utility model relates to the technical field of clocks and watches, in particular to a plate calendar clock circuit.

Background

The calendar clock is a clock which can display years, months, days, hours and minutes. It is common practice to integrate a plurality of displays on a single board, also known as a board calendar clock. For example, as shown in fig. 1, this is a typical calendar clock circuit.

The area with more sales of the calendar clock is concentrated in rural areas and industrial areas, and users hang the calendar clock on the wall to view information such as date and time, but the clock cannot display outdoor air temperature in real time at present.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a plate calendar clock circuit.

The technical scheme of the utility model is as follows:

the plate calendar clock circuit comprises an external air temperature sensor, a main control board, a clock chip and a display module, wherein the first end and the second end of the air temperature sensor are respectively connected with a battery anode and a battery cathode, the data output end of the air temperature sensor is connected with the output end of a light emitting diode of an optical coupler, the first end of the air temperature sensor is also connected with the first end of a first resistor, the second end of the first resistor is connected with the input end of the light emitting diode of the optical coupler, the power anode access end of a Schmidt trigger of the optical coupler is connected with a VCC pin of the main control board, the power cathode access end of the Schmidt trigger of the optical coupler is respectively connected with a first switch, a second switch, a third switch, a fourth switch and the ground, the first switch, the second switch, the third switch and the fourth switch are respectively connected with P14-P17 pins of a main control board, T2EX pins of the main control board are respectively connected with a second end of a second resistor and an output end of a Schmidt trigger of an optocoupler, a first end of the second resistor is respectively connected with a circuit power supply and VCC pins of the main control board, the main control board is respectively connected with RST pins, SCLK pins and I/O pins of a clock chip through T1 pins, WR pins and RD pins, the VCC pins of the clock chip are connected with the circuit power supply, and the main control board is connected with a display module through a flat cable.

Specifically, the temperature sensor adopts a TMP03 chip, directly adopts digital signal output, and the main control board does not need to convert.

Specifically, the main control board adopts an AT89C52 chip, adopts C language for reading and writing, has wide calendar or perpetual calendar open source program and can be used without self programming of a user.

Specifically, the clock chip adopts the DS1302, precisely outputs a time signal and can be reset by switching off a power supply.

Specifically, the display module adopts an LGM12641BS1R display panel, so that the display module is widely used and low in cost.

The beneficial effects of the utility model are as follows: the temperature sensor is arranged, the temperature can be sensed and displayed on the calendar clock through the display module, and because the electric signal of the temperature sensor is isolated from the main control board by adopting the optical coupler, the calendar clock body is not damaged even if the calendar clock body is subjected to thunder and lightning when the calendar clock is arranged outdoors, and the calendar clock has higher safety.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

fig. 2 is a circuit diagram of the present utility model.

Detailed Description

The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:

as shown in fig. 2, the plate calendar clock circuit comprises an external air temperature sensor U1, a main control board U2, a clock chip U3 and a display module U4, wherein a first end and a second end of the air temperature sensor U1 are respectively connected with a battery anode BAT+, a battery cathode BAT-, a data output end of the air temperature sensor U1 is connected with a light emitting diode output end of an optical coupler, the first end of the air temperature sensor U1 is also connected with a first end of a first resistor R1, a second end of the first resistor R1 is connected with a light emitting diode input end of the optical coupler, a power anode access end of a Schmitt trigger of the optical coupler is connected with a VCC pin of the main control board U2, a power cathode access end of the Schmitt trigger of the optical coupler is respectively connected with a first switch S1, a second switch S2, a third switch S3, a fourth switch S4 and a ground, the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are respectively connected with the P14-P17 pins of the main control board U2, the T2EX pin of the main control board U2 is respectively connected with the second end of the second resistor R2 and the output end of the optical coupler Schmitt trigger, the first end of the second resistor R2 is respectively connected with the circuit power VCC and the VCC pin of the main control board, the main control board U2 is respectively connected with the RST pin, the SCLK pin and the I/O pin of the clock chip U3 through the T1 pin, the WR pin and the RD pin, the VCC pin of the clock chip U3 is connected with the circuit power VCC, and the main control board U2 is connected with the display module U4 through a flat cable (which is a common connection mode in the field, generally, the P01-03, 05, 07 and 20-27 pins of the main control board are respectively connected with the 1-17 pins of the display module).

The temperature sensor type U1 adopts a TMP03 chip.

And the main control board U2 adopts an AT89C52 chip.

The clock chip U3 adopts DS1302.

The display module U4 adopts an LGM12641BS1R display panel.

The working principle of the utility model is as follows:

1) The clock chip sends out a second pulse signal, and the main control board calculates and outputs time information to the display module according to the pulse signal;

2) The main control board can be used as a setting button through the first switch, the second switch is used as a confirmation button, the third switch is a numerical value adding button, and the fourth switch is a numerical value subtracting button, so that initial time setting is completed;

3) The air temperature sensor is arranged outdoors, the air temperature sensor is used for sensing the air temperature, then the optical coupler is used for indirectly transmitting signals to the main control board, and the main control board is transmitted to the display module for real-time display.

The foregoing embodiments and description have been provided merely to illustrate the principles and best modes of carrying out the utility model, and various changes and modifications can be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The plate calendar clock circuit is characterized by comprising an external air temperature sensor, a main control board, a clock chip and a display module, wherein a first end and a second end of the air temperature sensor are respectively connected with a battery anode and a battery cathode, a data output end of the air temperature sensor is connected with a light emitting diode output end of an optical coupler, a first end of the air temperature sensor is also connected with a first end of a first resistor, a second end of the first resistor is connected with a light emitting diode input end of the optical coupler, a power anode access end of a Schmitt trigger of the optical coupler is connected with a VCC pin of the main control board, a power cathode access end of the Schmitt trigger of the optical coupler is respectively connected with a first switch, a second switch, a third switch, a fourth switch and a ground, the first switch, the second switch, the third switch and the fourth switch are respectively connected with P14-P17 pins of the main control board, a T2EX pin of the main control board is respectively connected with a second end of a second resistor and an output end of the optical coupler, a first end of the second resistor is respectively connected with a circuit and a pin of the main control board, a VCC pin of the main control board is respectively, a power supply cathode of the main control board is respectively connected with a VCC pin of the VCC trigger is connected with a VCC pin, a WR pin and a power supply pin of the VCC pin of the main control board is respectively connected with the VCC pin through a VCC pin, a VCC I pin of the main control board is respectively, a clock chip is connected with the VCC I pin, and a clock chip is connected with the clock chip.

2. The plate calendar clock circuit according to claim 1, characterized in that: the temperature sensor type adopts a TMP03 chip.

3. The plate calendar clock circuit according to claim 2, characterized in that: the main control board adopts an AT89C52 chip.

4. A plate calendar clock circuit according to claim 3, characterized in that: the clock chip employs DS1302.

5. The plate calendar clock circuit according to claim 4, characterized in that: the display module adopts an LGM12641BS1R display panel.