Meet Powah, a little power on/off toggle with an indicator LED. It uses a pair of Schmitt triggered inverters to debounce the button, and a P-channel MOSFET to switch the power on and off. The board is designed to be plugged into a breadboard.
It is designed to mount on one end of my breadboard, so as to reduce the wear and tear caused by excessive insertions of power bus leads. The board is approx 1 cm^2.
This is a brilliant idea – why didn’t I think of this?
List it on Tindie! I’d totally buy one. Or five. And I’m sure I’m not alone.
I like it. Sort of an over-engineered toggle switch, and I mean that as a complement :)
Are the switch pins accessible? This could be useful to add to a raspberry pi’s GPIO.
@Nick, with your experience on Tindie, offer to help out ! But yeah it’d be awesome to have a way to acquire some – I was kinda looking for the “buy now” button on the website but sadly no…..
I really dig this! I’d like to see a built in voltage regulator, and maybe some optional pins to measure current, but now I think I’m getting a little specific. Fantastic design though!
Very nice idea, but what about the copyright marking?
Here’s an even prettier alternative to the separate button and LED: https://www.sparkfun.com/products/10440
I really hope he starts selling these.
I like the raspberry pi idea, actually its useful for any of the boards. Apart from that, maybe add a 7805 like IC and make it a breadboard mount power supply. I would love that.
Interesting. I’m not a fan of stand-alone one button electronic on/off power control; better two buttons or a toggle. But that’s a topic debate for another day.
I remembered seeing this 2004 app note from Maxim. So I’ll just toss it out as it seems somewhat topic related:
One Button Turns Microprocessor On and Off
http://www.maximintegrated.com/app-notes/index.mvp/id/3283