Low amperage PSU causes OSD glitching

[Jerrk]

Describe the bug
I was trying to use my old 2A power supply from my TS100, but it was glitching the OSD whenever it would try to heat up. I'm posting this issue here by directions of @River-Mochi

To Reproduce
Using a low amperage PSU (2A) try to heat the pinecil tip

The OSD will start to glitch out

Expected behavior
An error message about low amperage could be useful in this situation - if that information can be made available via the firmware.

Details of your device:

• Device: Pinecil V2
• Release: v2.20.14AF70
• Power adapter being used: TS100 - KJS60A-2402000

Additional context
Video of the issue here:

ivtayt.mp4

https://streamable.com/ivtayt

[River-Mochi]

thank you for sharing this good example. this has been happening to a few Pinecil V2 owners, trying to use a low amp power supply is causing Glitchy reboots or even wild temperature jumping when going to set temperature.

• pinecil V2 minimum rating is 3amps (more is ok too so 3A-5A is good).
• don't exceed 24V if using the dc barrel jack
• avoid all cheap universal type DC barrel chargers, they are "dumb" bricks and tend to over-spike voltage which can kill pinecil.

Solution: swapping to a USB-C 20V, 3.25amp (PD65) charger fixed problem for you and several other Pinecil V2 owners over the past few months.

We have been seeing more people with this so wanted to let IronOS volunteers know that low amps is doing this even if person has a 24V charger, these TS100 style chargers given with ts100 irons are not good for pinecil (low 2amps and even worse I worry these cheap chargers have high voltage spikes that kill mosfet).

[River-Mochi]

• Another member video (anker 511, Nano 3, 30W - Not recommended).

• https://www.youtube.com/watch?v=26Dq6a11_9E

• Solution: He got a new USB-C 20V, 3.25 amp (PD65w) charger and everything is Good now.

• This video weirdness was caused by a weak Anker 511 Nano3, 30W phone charger. it struggles at Set temperature and jumps all over the place because not enough amps.

• Please see Power supply info on Pinecil Wiki for recommendations: https://wiki.pine64.org/wiki/Pinecil#Power_Supplies_and_Watts

Not recommended

[Ralim]

If your PSU cant supply the current, it will often have very small voltage dropouts that can cause glitching, resets or instability. Generally these are too short for the software to catch and alarm on. These are often short as modern power supplies hiccup when overloaded.

If the voltage is consistently low (older supplies, poor cabling, low battery) the firmware will throw a DC LOW alarm if the voltage drops out.

For PD supplies, the firmware should not negotiate an option that would allow it to get into this position, unless the supply itself cant actually meet its rating.