- Tue Nov 12, 2013 4:05 am
#165474
Hi All! Glad to be part of the community.
I had an idea for a latching power circuit, however I thought I'd come onto the forum to see whether anyone could tell me whether the concept works before I commit to parts. Or maybe someone has a better idea.
Requirements:
- Press a pushbutton. Latches power.
- Microcontroller turns on and stays on until it wishes to turn off.
- Unlatches power.
My idea is shown below. DISCLAIMER! I know that you need to use resistors with transistors. I didn't include them because its still theoretical at the moment.
So what do you guys think?
Bonus marks! : Is it possible for the push button to also latch power to the SR flip flop by connecting Q and flipflop's +? This would help me save even more power!
What sort of transistor should I be using, considering it is possible that additionally attached loads could draw large amounts of current? (darlington pair, mosfet?)
I had an idea for a latching power circuit, however I thought I'd come onto the forum to see whether anyone could tell me whether the concept works before I commit to parts. Or maybe someone has a better idea.
Requirements:
- Press a pushbutton. Latches power.
- Microcontroller turns on and stays on until it wishes to turn off.
- Unlatches power.
My idea is shown below. DISCLAIMER! I know that you need to use resistors with transistors. I didn't include them because its still theoretical at the moment.
So what do you guys think?
Bonus marks! : Is it possible for the push button to also latch power to the SR flip flop by connecting Q and flipflop's +? This would help me save even more power!
What sort of transistor should I be using, considering it is possible that additionally attached loads could draw large amounts of current? (darlington pair, mosfet?)