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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 ...


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Both should be fine. The 5.2V one may be better if you have a poor quality USB cable between the PSU and the Pi. Some USB cables have flimsy wires and drop significant voltage.


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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) ...


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No. Pin 6 is connected to the Pi's ground rail. Pins 2 and 4 are connected to the Pi's 5V rail.


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Yes, it is called a breadboard. They come in a variety of sizes.


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The Pi data states 5±0.25V; the MxL7704 PMIC Data states Input voltage range: 4.0V to 5.5V so NO If your 6V UBEC is producing 8V I would throw it in the bin!


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"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 ...


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Question How can Rpi read the LPT4150 or the TK15 Coulomb counter? Answer Update 2020may19hkt0933 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 ...


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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 ...


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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 ...


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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.


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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. (default "mmc") act_led_activelow Set to "on" to invert the sense of the LED (default "off") ...


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Should work by writing the appropriate value to /sys/class/leds/led1/trigger To switch it off use none, e.g.: sudo su echo none > /sys/class/leds/led1/trigger Use default-on to reverse it.


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