Prompt circuit and cup utilizing the same

1. A prompt circuit comprising:

a weight sensing unit configured to detect a weight change of liquid in a cup;

a processor coupled to the weight sensing unit, configured to receive the weight change; and

a prompt unit coupled to the processor, and comprising a communication unit and a speaker unit;

wherein when the weight sensing unit detects the weight change is less than a preset value, the processor sends a first control signal to the prompt unit to control the speaker unit to output an alarm signal; and

when the weight sensing unit detects the weight of liquid in the cup in unchanged for a preset time period after the output of the alarm, the processor outputs a second control signal to the prompt unit to control the communication unit to output a reminding message.

2. The prompt circuit of claim 1 , further comprising a switch unit; wherein a switch unit first terminal is coupled to a processor voltage input pin, and a switch unit second terminal is coupled to a battery.

3. The prompt circuit of claim 2 , wherein the switch unit comprises a slip switch; a slip switch active contact is coupled to the processor voltage input pin, a slip switch first stationary contact is grounded, a slip switch second stationary contact is coupled to the battery;

when the slip switch first stationary contact is coupled to the slip switch active contact, the battery cannot supply power to the processor; and

when the slip switch second stationary contact is coupled to the slip switch active contact, the battery supply power to the processor through the slip switch.

4. The prompt circuit of claim 3 , wherein the weight sensing unit comprising a resistance weight detector and a first resistor; a first resistor first terminal is coupled to the processor voltage input pin, a first resistor second terminal is coupled to a resistance weight detector first terminal; a resistance weight detector second terminal is grounded; and a processor first data pin is coupled to a node between the first resistor and the resistance weight detector.

5. The prompt circuit of claim 2 , further comprising a temperature sensing unit; wherein the temperature sensing unit comprises a resistance temperature detector and a second resistor; a second resistor first terminal is coupled to the processor voltage input pin, a second resistor second terminal is coupled to a resistance temperature detector first terminal; a resistance temperature detector second terminal is grounded; a processor second data pin is coupled to a node between the second resistor and the resistance temperature detector; and the temperature sensing unit transmits a liquid temperature in the cup to the processor.

6. The prompt circuit of claim 5 , further comprising a latch unit and a display unit; wherein the processor transmits the liquid temperature in the cup to the display unit through the latch unit, and the display unit displays the liquid temperature in the cup.

7. The prompt circuit of claim 6 , wherein the display unit comprises three numeric displays; the three numeric displays comprises first, second, and third segment pins, the three segment pins are corresponding to the three numeric displays;

the latch unit comprises a first latch and a second latch, first latch eight input pins and second latch eight input pins are coupled to processor eight data pins, a processor first enable pin and a processor second enable pin are coupled to a first latch enable pin and a second latch enable pin respectively, first latch eight output pins are coupled to display unit eight data pins; and

second latch first, second, and third output pins are coupled to the first, second, and third segment pins respectively.

8. The prompt circuit of claim 1 , wherein the communication unit comprises a global system for mobile communication (GSM) chip and a storage unit; and the storage unit stores a user mobile phone number, and the GSM chip outputs the reminding message to the user mobile phone number, according to the second control signal.

9. A cup comprising a prompt circuit, the prompt circuit comprising:

a weight sensing unit configured to detect a weight change of liquid in a cup;

a processor coupled to the weight sensing unit, configured to receive the weight change; and

a prompt unit coupled to the processor, and comprising a communication unit and a speaker unit;

wherein when the weight sensing unit detects the weight change is less than a preset value, the processor sends a first control signal to the prompt unit to control the speaker unit to output an alarm signal; and

when the weight sensing unit detects the weight of liquid in the cup in unchanged for a preset time period after the output of the alarm, the processor outputs a second control signal to the prompt unit to control the communication unit to output a reminding message.

10. The cup of claim 9 , the prompt circuit further comprising a switch unit; wherein a switch unit first terminal is coupled to a processor voltage input pin, and a switch unit second terminal is coupled to a battery.

11. The cup of claim 10 , wherein the switch unit comprises a slip switch; a slip switch active contact is coupled to the processor voltage input pin, a slip switch first stationary contact is grounded, a slip switch second stationary contact is coupled to the battery;

when the slip switch first stationary contact is coupled to the slip switch active contact, the battery cannot supply power to the processor; and

when the slip switch second stationary contact is coupled to the slip switch active contact, the battery supply power to the processor through the slip switch.

12. The cup of claim 11 , wherein the weight sensing unit comprising a resistance weight detector and a first resistor; a first resistor first terminal is coupled to the processor voltage input pin, a first resistor second terminal is coupled to a resistance weight detector first terminal; a resistance weight detector second terminal is grounded; and a processor first data pin is coupled to a node between the first resistor and the resistance weight detector.

13. The cup of claim 10 , the prompt circuit further comprising a temperature sensing unit; wherein the temperature sensing unit comprises a resistance temperature detector and a second resistor; a second resistor first terminal is coupled to the processor voltage input pin, a second resistor second terminal is coupled to a resistance temperature detector first terminal; a resistance temperature detector second terminal is grounded; a processor second data pin is coupled to a node between the second resistor and the resistance temperature detector; and the temperature sensing unit transmits a liquid temperature in the cup to the processor.

14. The cup of claim 13 , the prompt circuit further comprising a latch unit and a display unit; wherein the processor transmits the liquid temperature in the cup to the display unit through the latch unit, and the display unit displays the liquid temperature in the cup.

15. The cup of claim 14 , wherein the display unit comprises three numeric displays; the three numeric displays comprises first, second, and third segment pins, the three segment pins are corresponding to the three numeric displays;

the latch unit comprises a first latch and a second latch, first latch eight input pins and second latch eight input pins are coupled to processor eight data pins, a processor first enable pin and a processor second enable pin are coupled to a first latch enable and a second latch enable pin respectively, first latch eight output pins are coupled to display unit eight data pins; and

second latch first, second, and third output pins are coupled to the first, second, and third segment pins respectively.

16. The cup of claim 9 , wherein the communication unit comprises a global system for mobile communication (GSM) chip and a storage unit; and the storage unit stores a user mobile phone number, and the GSM chip outputs the reminding message to the user mobile phone number, according to the second control signal.