Guru
Joined: 13/10/2014
Location: AustraliaPosts: 1727
| Posted: 04:45am 07 Jun 2024 |
Thanks for the update, yes I was about to post about the poor implementation / design of that 5v regulator, IMHO it is a POS.
In the interest of keeping it simple and getting that 5v reg out of the way.
I fitted a linear regulator 7805 - we have discussed this before - it is catered for in Wiseguys board design, available everywhere, local jaycar in AU.
BTW extensive testing on the 12v regulator indicated no issues.
The controller in the Inverter, there is noise on the 48V battery feed. This is the 5v rail, No LCD and the Controller NANO is not inserted.
With the Nano inserted - there is a slight blip on the rail at 2.7v as the Nano power down. There may be something happening as the LCD backlight switches off on the now unregulated 5v rail and other 5v IC drop off?
Finally, a small 6v 1000uf electrolytic across the LCD plug on the controller, a slight noise at 2.7v then a smooth slope.
Compare the one above with the old regulator below- which BTW has been running like this, faultlessly for months, and over numerous power cycles every single day in testing. Doesn't warrant the 1000uf cap in my opinion.
However I would fit a small 330uf to the LCD 5v PCB and one across the LCD plug in the controller - just to dampen anything from the 5v lead to the LCD.
OLD REGULATOR:
Edited 2024-06-07 14:55 by KeepIS