Guru
Joined: 21/06/2018
Location: AustraliaPosts: 1156
| Posted: 10:33am 08 Jun 2024 |
This is like days of our lives with this damn Nano low voltage issue. I spent more time today running slow changes in the rail voltage between 1.5V & 2.5V to be sure to be sure.... and would you believe I saw no flash of the Inverter Nano TX LED but as I restored the rail to 5V I had black blocks on the display Nano, Cycling the power off and on & pressing the LCD Nano reset did zilch so I would recommend a 5V rail supervisor is placed on the LCD Nano as well.
If/when we go to Rev8 perhaps we should have a 4 wire connector between the controller card and the LCD Nano. Then they can share the 5V rail supervisor on the main controller card and the 4th wire carries the reset line to the LCD Nano's reset pin. Cable difference in cost between 3 wires and 4 wires is a few cents, much cheaper than rail supervisors from Digikey.
By the way LCSC has some 4.2V supply monitors AZ7042Z-E1 for under 9c each. I have emailed and asked LCSC to expedite 250 - 500 HY5608s as they will be needed anytime soon.