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Posts Tagged ‘toggle switch’

Power toggle switch with an indicator LED

Thursday, February 7th, 2013

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...

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Posted in project logs | 9 Comments »

Recent Comments

  • Bob: Jambalaya rocks.
  • KH: I should point out something... well, lead acid car batteries are designed to be well-charged all the time. The plates (which are patterned and thin)...
  • David Haile: You are a smart person and absolutely correct. That kind of current needs a lead acid car battery behind it. Still, it does have its...
  • KH: The solution discussed in the linked article is wrong. It's a largish Lipo (2500mAh) and he thinks 77uA is acceptable... ha ha ha ha ha....
  • Dave: I never had to opportunity to learn or use this stuff when I was in college (I'm sooo old that op-amps were just being developed...