Hi,
I did a lot of Netduino projects so far, but never one like I have in mind now.
I want to connect a Netduino Mini in my motorcycle for data logging and GPS tracking. Now, my motorcycle has a 12V "car battery" which can provide quite some amps.
Now I know the mini can get quite hot when powered with 12V. Also, I know car batteries aren't very stable; when I start the motor, there are large fluctiations in the power supply.
So I would like to feed my Mini just a stable 5V.
I -think- I know how to do this, but I am not sure. So before I blow something up, I would love to get some advise.
Parts of which I am thinking:
- 1x 1A fuse - to prevent that my Netduino circuitry is pulling too much amperes, for example if something is shorted
- 2x 1A diode - to be sure power flows in the correct direction
- 1x 5V voltage regulator (LM7805?) - To downscale ~12V to 5V
- 1x 100µF transistor on the 12V side - To stabalize the voltage levels
- 1x 1µF transistor on the 5V side - To stabalize the voltage levels
My application won't use many amperes while idle. I'm only a bit afraid a voltage regulator like the LM7805 will turn a lot of power into heat, thus wasting my battery.
So, any thoughts? Dos and donts?