GPS for Kenwood TM D700 Part 1 Power Supply
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- Опубліковано 23 сер 2024
- The goal of this series of videos is to build a GPS receiver for the Kenwood TM-D700.
In this episode we test the step down buck converter to convert 12V from the car to 5V for the GPS receiver module. I'm using an older LM2596 module.
Fun component :)
Remember that when your car's generator is charging, the voltage can easily be 14 volts, and even a bit more. But I'm sure the step down converter can handle that just fine.
Good point. That a nice benefit for using the step down converter that I don't have to worry about that. Thanks for watching.
These buck converters are pretty stable on the output, provided you give enough headroom for them to do their job properly. On the adjustable converters, I have found that they can be a little questionable by some manufacturers, but overall are all within a pretty tight tolerance. I typically see less then 1% deviation. However, I still do not trust a variable regulator in the place of a fixed. Especially on something that is of importance.
@@ChrisRobinsonKF6NFW Yes. I only commented because he tested it to 13 volts, and stopped there. I just wanted to point out that the voltage in a car can be more than that when the generator is charging. So if he really wanted to be sure, he should have tested it to 14 or maybe even 14.2 volts. (I mean, what's the point of testing it if you're not testing it for at least the range it will experience when in service?) But I'm sure the buck converter will handle it well, so it's not really an issue.
what GPS unit are you going to use?
I too am just starting to build the GPS unit for my D700A as well. Waiting on Amazon to deliver my parts now so I can finish this up. I went with the neo-6m. and an even much smaller in size buck converter, it measures only 20mm x 11mm x5mm , but allows to be shoved into a small case and tucked away in my work truck.
It's a GT-U7 which apparently is a Neo-6m as well.