Key-press input module

A technology of input modules and buttons, applied in simulators, instruments, computer control, etc., can solve problems such as easy burning, complicated circuits, and inconvenience for drivers and pedestrians
CN101937202BInactive Publication Date: 2012-10-03曹志才
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
曹志才
Publication Date
2012-10-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a key-press input module which comprises a motor vehicle horn key-press, a stabilivolt tube DW2, a resistance R3 and a resistance R4, wherein one end of the motor vehicle horn key-press is connected with the power output positive end or the power output negative end of a motor vehicle battery jar, the other end of the motor vehicle horn key-press is connected with a digital signal input end IN1 of a single chip microcomputer through the resistance R3, the digital signal input end IN1 of the single chip microcomputer is also connected with a digital signal output end O1 through the resistance R4 and also the cathode of the stabilivolt tube DW2, the anode of the stabilivolt tube DW2 is in grounding, and one end of the motor vehicle horn key-press is connected with the power output positive end or the power output negative end of the motor vehicle battery jar through a single-pole double-throw switch. The invention provides the key-press input module which has the advantages of simple structure and convenient use.
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Description

technical field

[0001] The invention relates to a key input module. Background technique

[0002] At present, the driving frequency of motor vehicle electric horns is fixed before leaving the factory, and the natural frequency of electric horns is changed during use due to changes in environmental conditions (for example: temperature changes between winter and summer, air pressure between plains and plateaus) Changes in the electric horn, etc.) and changes in the mechanical properties of the electric horn can cause its changes. Since the resonance peak of the electric horn diaphragm is very sharp, if the driving frequency cannot be adjusted accordingly, it may cause the sound pressure level of the electric horn to drop sharply. , or even scrapped, thus affecting the prompt effect, and the energy consumption will also increase. For example: Patent No. 98807769.8 method and device for frequency stabilization of electric horn, its driving frequency is solidified in the program...

Claims

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