Raspberry 4 low power
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@jrockland I run my Pi 4 off the duet and it works just fine. I also run a BLTouch off the 5V as well. My touch screen is also powered off the duet 5V supply which is a 7" pi touch screen. Could you just have another load that is taking too much power?
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@baird1fa nothing else, might have a defective duet board. even when I take off the bl touch it doesn't get enough power.
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@jrockland said in Raspberry 4 low power:
even when I take off the bl touch it doesn't get enough power.
bl-touch uses negligible power. could you measure the 5v voltage at both the Duet and the Pi?
And when you say " it doesn't get enough power" it crashes or just turn on the led (and lightening symbol on screen)?
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@bearer thank Ill get that changed next time it stop.
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@bearer it is running slow and hot because it doesn't receive enough power.
I just took a IR picture of the duet and the power converter are burning up. V IN is stable, 5V isnt. -
@jrockland said in Raspberry 4 low power:
it is running slow and hot because it doesn't receive enough power.
not sure that is correct, normally it runs slow because it is hot; what does
dmesg -T | grep Under-voltagesay on the pi?also interesting to corelate with
watch -n 10 vcgencmd get_throttled(or maybe a little dirtier and simpler at the same time:while true; do echo -en "`date` `vcgencmd get_throttled`\n"; sleep 10; done` -
@bearer said in Raspberry 4 low power:
dmesg -T | grep Under-voltage
unstable voltage, drop every 30 seconds.
temp is fine, 44c -
@jrockland said in Raspberry 4 low power:
temp is fine, 44c
vcgencmd get_throttled doesn't return the temperature, but rather what has and is throttling the pi, voltage alone doesn't necessarily result in throttling and doesn't even have to correlate to insufficient power.
i get under voltage entries even with the official pi supply, but it doesn't result in throttling. (or maybe both went away after i put avoid_warnings=2 in config.txt, been a while)
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@bearer I used other way to check the cpu and gpu temp. didnt need the get_throtled
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@jrockland I checked the power with a voltmeter, it is bad. Ill switch to my pi power supply.
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@jrockland said in Raspberry 4 low power:
it is bad
excellent, but why not put up a number - pretty much everyone else doesn't have problems so something is either wrong with your duet or your setup imho; but horse, water, whatever.
