Power toggle switch with an indicator LED
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.
This entry was posted in project logs and tagged debouncing, toggle switch.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.
Comments
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