Guru
Joined: 21/06/2018
Location: AustraliaPosts: 1172
| Posted: 03:34pm 05 Jun 2024 |
Mike, you mentioned that the brownout of the Nano is around 1.8V I read somewhere that there is a register value to set the brownout detection value. If the value can be set to a high level say 3 or 4 volts then operation should be halted when it gets to that threshold ?
There is a linear regulator on Nano pin 30, so we could feed it from the 12V. There is also a reset pin on Pin3, so if the internal brownout detector is a no go, I am starting to lean towards a separate added 5V supervisor 3 pin device (TO92) on both the inverter and the LCD boards as a last resort.
Dex is suggesting we use an A/D and trigger an scr etc on the 5V and it does not feel like the right approach as we might have simpler solutions available yet.
Poida ! do you have any idea about brown out settings and whether it is normally enabled and if so what brownout value. Also for the LCD display, I am trying to avoid messy hardware changes and it would be great if it is just a software tweak setting to stop the Nano from operation below 3 or 4 bolts and way before 1.8V ?
Edited 2024-06-06 01:36 by wiseguy