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Turn-on circuitry: MCU startup time too long.
UPDATE: Tested the concept above and it worked very well. Latch is instantaneous and MCU successfully pulls charge off the gate to turn off. I wouldn't have imagined the solution being as simple as adding 1 resistor and changing a line of code. Thanks for the help, Evan- evanwi92
- Post #6
- Forum: Circuit design
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Turn-on circuitry: MCU startup time too long.
Looked at the 555 timers as you recommended. Actually made me think of this possible solution (see attached pic): Current circuit is in blue. If I add the 1k resistor between the 3v3 supply and the latching FET gate, then there should not be a delay in latching. I can configure the Keep On...- evanwi92
- Post #5
- Forum: Circuit design
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Turn-on circuitry: MCU startup time too long.
Yes, everywhere I've read it would seem the processor could start up that quickly however I'm sure the abstraction of the compiler is bogging it down. That's great advice to have some hardware give the user feedback before the system is actually on. Do you have any recommendations and...- evanwi92
- Post #3
- Forum: Circuit design
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Turn-on circuitry: MCU startup time too long.
Hi, It's my first post on here. Thanks for the support! I'm developing on an STM32F410RB Nucleo and have a need for a simple, pushbutton on/off switch for my project. I'd like the pushbutton to be the single on/off switch, however the system will also need to be able to turn itself off. I...- evanwi92
- Thread
- Replies: 6
- Forum: Circuit design
