1400在线购买

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1400概述

INTERFACE BOARD PUSH BUTTON SW

参数名称	属性值
配件类型	接口板

Push-button Power Switch Breakout

PRODUCT ID: 1400

Description

The Adafruit Push-button Power Switch is a tidy little design that lets you control a DC power

source using an everyday tactile button. The breakout uses a latching analog circuit that is

triggered by a push of the button. Press once to turn on, then press again to turn off. The circuit

uses a 3A P-FET to connect and disconnect the IN pin to the OUT pin. Works great from 3V to

14VDC and up to 3A (although the FET gets a little toasty at continuous 3A draw) yet has only

0.5uA quiescent current draw.

Using it is easy: connect the power source to Ground and IN, then the load from Ground to OUT.

We include a 12mm tactile switch that works well but you can solder in your own switch as well.

Press the button (or short the button pins) to alternate between on or off. A on-board red LED will

light up when active so you know its working. There's a fourth KILL pin, which you can use to turn

off the load and/or keep it off even if the button is pressed. When 1 or more volts is applied it will

instantly turn off the FET. This allows your project to turn itself off.

Comes with a assembled & tested bread-board friendly breakout board with four mounting holes,

a 12mm tactile button, and some 0.1" male header you can solder to the board to plug it into a

breadboard.

The power switch is an elegant way to control power to your project, but there are some things to

keep in mind: since there is a pass FET, this is only for 3-14V DC voltages. This is not a mechanical

switch so there is no air-gap isolation. There is a 'body diode' in the pass FET so if the load has a

voltage on it that is higher than the input voltage, current will flow back to the input. There is built-

in debouncing but very bouncy switches can be annoying as they will turn on and off fast instead

of latching.

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