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2023-04-06, 03:25 PM
(This post was last modified: 2023-04-06, 03:38 PM by MigGat.)
Reading the docs I found "Do not power the system from the Raspberry Pi and the MacArthur HAT at the same time, you must use only one power supply". I connected a 12V power source (actually 14.7V) to GND and 12V SW Following the Maiana example. I tested Maiana and worked perfectly fine, but the Raspberry is not powered.
Should I connect the same source to both 12V and 12V SW?
I mean, I tried and worked, but I don't understand the meaning of those 2 connections.
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In early prototypes, the MAIANA was connected to 12V internally instead of 12V SW, but we noticed that when you turn off your boat's main switch, the MAIANA would still run silently (no red LEDs) and you could accidentally discharge the battery.
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You can also choose not to use the main switch of the boat's electronics and use a switch to turn off only the Raspberry safely without having to do it by software.
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Ok, got it. Since I have both MAIANA and the power module, I'm using the last diagram and everything is working fine.
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Ah OK now I understand your confusion, first we are saying "do not connect 2 power supplies" but when you use MAIANA without the pololu power module in fact you are using 2 sources even though they are 2 totally separate circuits. I will try to add a note to the manual, thanks.
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2023-04-11, 05:20 PM
(This post was last modified: 2023-04-12, 11:50 AM by holgerw.)
Hello,
About the Powermodule and the 12V Lines, the Fuse (2-5A) must be the Line to the Battery (best near the Battery), and not only in the switched Line.
ym2c - Holger
Still waiting for the Arrival to Austria...... ... it just came to my door.