Key Features
- Control a DC power source using this small tactile button
- Assembled & tested bread-board friendly breakout board with four mounting holes
- Uses a 3AP-FET to connect and disconnect the IN pin to the Out pin
- Works great for 3V to 14VDC
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.
Item Specifics
1 - Assembled & tested bread-board friend breakout with 12mm tactile button
1 - 0.1" male header piece
Dimensions: 20.51mm / 0.8" x 17.75mm / 0.69" x 2.66mm / 0.1"
Height with Switch: 8.69mm / 0.34"
Weight: 2.6g