Single-chip microcomputer switching control circuit

Abstract

The invention discloses a single-chip microcomputer switching control circuit. The circuit comprises a resistor R1, a LED, a button switch SB, a capacitor C1, a diode D1 and a triode VT1; one end of the resistor R1 is connected with a power source VCC and the emitter of a triode VT2; the base of the triode VT2 is connected with the resistor R1 and a resistor R2; one end of the resistor R2 is connected with the anode of the LED and the button switch SB; the cathode of the LED is connected with the collector of a triode VT3; the base of the triode VT3 is connected with a resistor R4; and one endof the resistor R4 is connected with a resistor R3, the capacitor C1 and the IO2 port of a single-chip microcomputer. According to the single-chip microcomputer switching control circuit of the invention, the button switch SB is matched with a plurality of triodes, so that a control component for the powering on and powering off of the single-chip microcomputer can be formed. The structure of thesingle-chip microcomputer switching control circuit is very simple. The single-chip microcomputer switching control circuit can effectively control the power source of the single-chip microcomputer and realize zero-power consumption standby.

Description

technical field [0001] The invention relates to a switch circuit, in particular to a single-chip microcomputer switch control circuit. Background technique [0002] Switching power supply is a kind of power supply that uses modern power electronics technology to control the time ratio of switching on and off to maintain a stable output voltage. Switching power supply is generally composed of pulse width modulation control single-chip microcomputer and MOSFET. With the development of power electronics technology and Innovation, making switching power supply technology is also constantly innovating. At present, switching power supply is widely used in almost all electronic devices due to its small size, light weight and high efficiency. Components, and their power switch control has always been the focus of research in the industry. In many existing single-chip system switching circuits, it is impossible to completely turn off the power supply and achieve zero power consumpti...

AI Technical Summary

Problems solved by technology

At present, switching power supply is widely used in almost all electronic devices due to its small size, light weight and high efficiency. Components, its power supply switch control has always been the focus of research in the industry. In many existing single-chip system switching circuits, it is impossible to completely turn off the power supply and achieve zero power consumption standby.

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