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Full machine-readable index: https://core-electronics.com.au/llms.txt # Adafruit Push-button Power Switch Breakout **Type:** Product page · **SKU:** ADA1400 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/adafruit-push-button-power-switch-breakout.html ([markdown](https://core-electronics.com.au/adafruit-push-button-power-switch-breakout.html.md)) 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... ## Pricing - **Price:** $11.10 (inc GST) — $10.09 AUD, exc GST - **Quantity discounts:** 10+ $9.79 (exc GST) · 50+ $9.58 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 1 today, and up to 500 more in 8–12 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA1400:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ADA1400:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## 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. Adafruit 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. Adafruit Push-button Power Switch Breakout ([11:52](https://www.youtube.com/watch?feature=player_detailpage&v=oHNjyMrqcno#t=712)) ## Technical Details - 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 - [MC14093 Datasheet](https://core-electronics.com.au/attachments/localcontent/MC14093B-D_15752904c25.PDF) (the NAND gate used) [P-Channel Pass MOSFET](https://core-electronics.com.au/attachments/localcontent/DMG3415U_22190130460.pdf) - [EagleCAD PCB files on GitHub](https://github.com/adafruit/Adafruit-Push-Button-Power-Switch-PCB) - [Adafruit Fritzing Library](https://github.com/adafruit/Fritzing-Library) ![](https://core-electronics.com.au/attachments/localcontent/rohs_icon_8216055e11.jpg) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/1/4/1400-05.jpg)