I want to be able to make device to track the movement of a trailer.
The problem is that most trailers don't have 12 or 24 V power, even when on the move.
The average amount of power that I need depends on how much time the GPS and the phone are turned on. I can work with 20 mA at 3.8 V.
If I have a large pack of Lithium Thionyl Chloride batteries I can get maybe a year or two out of them.
Is it possible to generate enough power from the trailer movement, in the same way that an automatic watch generates power as the wearer moves?
I was thinking of an eccentric weight on a vertical axis generator. My initial calculations make me think that only tiny amounts of power would be available, but I would welcome any comments from anyone who has any experience of this.
The problem is that most trailers don't have 12 or 24 V power, even when on the move.
The average amount of power that I need depends on how much time the GPS and the phone are turned on. I can work with 20 mA at 3.8 V.
If I have a large pack of Lithium Thionyl Chloride batteries I can get maybe a year or two out of them.
Is it possible to generate enough power from the trailer movement, in the same way that an automatic watch generates power as the wearer moves?
I was thinking of an eccentric weight on a vertical axis generator. My initial calculations make me think that only tiny amounts of power would be available, but I would welcome any comments from anyone who has any experience of this.