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Portability key circuit

A technology of portability and button, applied in electrical components, electronic switches, pulse technology, etc., can solve the problems of poor portability and high circuit cost, and achieve the effect of simple circuit, saving circuit development cost, and strong portability.

Active Publication Date: 2013-01-09
GUANGDONG VANWARD NEW ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing key circuit, the ordinary key switch and the touch key switch need to be realized through different circuit structures, so if it is necessary to change the ordinary key switch circuit into a touch key switch, the circuit must be re-wired, so there is poor portability , relatively high circuit cost and other defects, in order to overcome these defects, the portable button circuit is developed

Method used

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specific Embodiment approach

[0018] Specific implementation method: see attached figure 1 , the present invention includes a central control chip 2, a universal button access unit 3, a power supply, a pull-up resistor and several voltage dividing resistors with different resistance values, the plurality of voltage dividing resistors are connected in parallel with each other, and the parallel terminals of the several voltage dividing resistors are connected to the upper The pull resistor is electrically connected to the AD port of the central control chip 2, and the universal key access unit 3 is electrically connected to the other end of some voltage dividing resistors. The universal key access unit 3 is used to collect touch key or common key switch information.

[0019] See attached figure 2 , the number of touch buttons in this embodiment is 3, and this embodiment includes 3 touch buttons 1, central processing chip 2, universal button access unit 3, resistor R5, pull-up resistor R6, voltage dividing r...

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Abstract

The invention discloses a portability key circuit which comprises a central control chip, a power supply, a pull-up resistor and a plurality of divider resistors with different resistances, wherein the plurality of divider resistors are connected with each other in parallel; parallel-connected ends of the plurality of divider resistors are electrically connected with the pull-up resistor and an AD (analog-to-digital) port of the central control chip; the portability key circuit is characterized by further comprising a universal key access unit, wherein the universal key access unit is electrically connected with the other ends of the plurality of divider resistors. The universal key access unit is used for acquiring information of touch keys or key switches; and the portability key circuit has the characteristics of good portability and circuit cost saving.

Description

technical field [0001] The invention relates to a portable button circuit, in particular to a button circuit used in household appliances such as water heaters, gas wall-hung boilers, range hoods, gas stoves, and disinfection cabinets. Background technique [0002] In existing household appliances, button circuits are widely used in various display control panel assemblies, among which touch buttons, as a new interface for human-computer interaction, have broad application space and market demand. In the existing key circuit, the ordinary key switch and the touch key switch need to be realized through different circuit structures, so if it is necessary to change the ordinary key switch circuit into a touch key switch, the circuit must be re-wired, so there is poor portability , relatively high circuit cost and other defects, in order to overcome these defects, a portable button circuit is developed. Contents of the invention [0003] The technical problem to be solved by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/96
Inventor 叶远璋潘子宇
Owner GUANGDONG VANWARD NEW ELECTRIC CO LTD
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