Last time I looked at the documentation it specified an "ideal diode" - which is NOT an actual diode.
There are NO polyfuses or diodes on the Pi4.
The wires in a ribbon cable are woefully inadequate! Use REAL wires, as short as possible.
If you actually read the HATS Master it says "Raspberry Pi Model A+, B+, Raspberry Pi 2B and 3B have an 'ideal' reverse ...
A 'portable' 2.5" USB HDD can take bursts of considerably more than 500mA at the time of spin-up, up to 1000mA or more, and also when seeking or carry out extended reads/writes. Also, the total current available from all of the USB ports is 1200mA, so using 2 USB drives at once is VERY unlikely to be successful, even with the official 5.1v 3.0A (3000mA) ...
"What can happen if this sort pf power cut occurs" most of the time NOTHING.
If the Pi is updating the SD Card it may become corrupted.
The usual procedure by most of the experienced PI users if this happens is to restore from your backup.
After 7 years and 8 Pi I have never suffered corruption in a power outage,
HOWEVER I ALWAYS backup before doing an ...
How can Rpi read the LPT4150 or the TK15 Coulomb counter?
To summarize, LTC4150 Coulomb Counter's max voltage and current do not meet the OP's requirement, and on the other hand, TK15's LCD display panel signals are very difficult to extract for Rpi to use. Now I think there are at least two workarounds:
(1) Use ...
The power logo means that the Pi isn't getting enough current. This is often the case with cheap chargers from China.
According to the Raspberry Pi Cookbook by Simon Monk, he says that:
...The only question, then, is if they can supply enough current.
If they can't, then a few bad things can happen:
They may get hot and be a potential fire ...
This is how to do it:
simulate this circuit – Schematic created using CircuitLab
Ordinarily, solenoids are used to actuate a mechanical device, and have a "control" input that is typically connected to a switch. However, as you've not provided any details on the solenoid or the application, I've shown a manual toggle switch in the schematic. This can ...
I stubled upon this hackaday post: https://hackaday.com/2019/11/28/raspberry-pi-4-hdmi-is-jamming-its-own-wifi/
I tried replacing the HDMI cable and that did the trick. Still strange that it worked for so long.
There's a bunch of controls you can use in /boot/config.txt
act_led_trigger Choose which activity the LED tracks.
Use "heartbeat" for a nice load indicator.
act_led_activelow Set to "on" to invert the sense of the LED