Low-voltage detecting circuit of air conditioner infrared remote control

Abstract

The invention discloses a low-voltage detecting circuit of an air conditioner infrared remote control. The low-voltage detecting circuit of the air conditioner infrared remote control comprises a master control chip U1, an LCD (liquid crystal display) module, an audion Q1, a resistor R1 and a resistor R2. The LCD module is provided with an icon for displaying battery level; the LCD module and the audion Q1 are connected with the master control chip U1; the collector of the audion Q1 is connected with the pin P32 of the master control chip U1, and the transmitter of the audion Q1 is connected with the pin P31 of the master control chip U1; one end of the resistor R1 is connected with the base of the audion Q1, and the other end of the resistor R1 is connected with the pin P31 of the master control chip U1; one end of the resistor R2 is connected with the base of the audion Q1, and the other end of the resistor R2 is connected with the pin P30 of the master control chip U2; the master control chip Q1 is S3C9234, and the audion Q1 is S8050. The low-voltage detecting circuit of the air conditioner infrared remote control has the advantages of being capable of reminding a user of changing batteries in time through flashing of the icon when at low battery power, low in cost, easy to implement and the like.

Description

technical field [0001] The invention relates to a low voltage detection circuit of an air conditioner infrared remote controller. Background technique [0002] Household air conditioners are generally controlled by remote control. Generally, the remote control of the air conditioner uses two 1.5V dry batteries connected in series as the power supply. After the remote control is used for a certain period of time, the power of the battery decreases, and the battery voltage will also decrease. [0003] In the prior art, the remote controllers of household air conditioners do not have a voltage detection function nor a power display function. When the voltage of the battery of the infrared remote control of the household air conditioner drops to 2.4V (this voltage is related to the selected microcontroller) or below 2.4V, the displayed characters will be blurred or even unusable. For ordinary air-conditioning infrared remote controllers, considering the cost, it is impossible...

AI Technical Summary

Problems solved by technology

However, since there is no reminder that the battery is low, if there is no spare battery at home, it is impossible to use the remote control to control the air conditioner

For the hanging air conditioner, due to the high suspension and no control panel, the air conditioner cannot be used, which brings inconvenience to the user

At this time, the user can only use the air conditioner by purchasing and replacing the battery

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