2019-09-24, 10:53 AM
I've been through what you've been through and it's really frustrating. When you are absolutely sure that your power source is the right one the problem is always in the cable and its micro-usb connector.
The vast majority of USB cables are not really prepared for the large amount of power that a Rpi 3 or higher is going to demand.
Keep in mind that in a USB cable coexist 4 smaller cables for transmission of energy and data. In fact to feed the Rpi the data surplus but take space to the power so it is difficult to find normal USB cables with enough capacity to transmit that energy. In addition, often the solder to the micro-usb connector or the connector itself is not good enough.
I solved it with a 12 v-5V adapter like this that already includes its specific connector just to transmit power.
![[Image: s-l1600.jpg]](https://i.ebayimg.com/images/g/E9AAAOSwn4Vbg5xy/s-l1600.jpg)
Since I use it I don't have the bloody lightning icon bothering me anymore. And when I switched to a Rpi 4 I used a simple Micro-usb to USB-C adapter and it goes smoothly.
In your case the power source is good but the cable is really your problem. Using GPIO is a Plausible solution but somewhat risky as sailoog tells you. I have used it and it is functional, but if you find a suitable cable it is a better solution.
In the new Rpi 4 has moved from the micro-usb connector to USB-C precisely because the USB-C has already been designed with the aim of transmitting greater amounts of energy so that only USB-C of very poor quality give problems and the vast majority work properly.
The vast majority of USB cables are not really prepared for the large amount of power that a Rpi 3 or higher is going to demand.
Keep in mind that in a USB cable coexist 4 smaller cables for transmission of energy and data. In fact to feed the Rpi the data surplus but take space to the power so it is difficult to find normal USB cables with enough capacity to transmit that energy. In addition, often the solder to the micro-usb connector or the connector itself is not good enough.
I solved it with a 12 v-5V adapter like this that already includes its specific connector just to transmit power.
Since I use it I don't have the bloody lightning icon bothering me anymore. And when I switched to a Rpi 4 I used a simple Micro-usb to USB-C adapter and it goes smoothly.
In your case the power source is good but the cable is really your problem. Using GPIO is a Plausible solution but somewhat risky as sailoog tells you. I have used it and it is functional, but if you find a suitable cable it is a better solution.
In the new Rpi 4 has moved from the micro-usb connector to USB-C precisely because the USB-C has already been designed with the aim of transmitting greater amounts of energy so that only USB-C of very poor quality give problems and the vast majority work properly.
Why are sailors more daring than other men?
Because: No man is so often afraid
like the sailors.
"Of the questions of the seafaring world", in
The Tree of Science, Ramon Llull
Because: No man is so often afraid
like the sailors.
"Of the questions of the seafaring world", in
The Tree of Science, Ramon Llull