- #1
lowspeedchase
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Hi all...
I plan on using the following device: "[PLAIN Manual.pdf"]http://www.pc-control.co.uk/images/Wasp Manual.pdf[/URL] to monitor 12v lines in a jeep and respond with various actions.
A simple example:
Monitor the 12v+ line for the vehicles brights, when it gets hot (hot meaning a current flowing through the line), enable a set of auxiliary lights.
The issue is that the board I am going to purchase, per the aforementioned link, can monitor up to 5v for input.
The solution i have come to is to attach a "+5V Fixed-Voltage Regulator 7805" between the 12v line and the input on the board.
I have a couple of questions though that I hope some of you experts can provide some guidance on:
Do I need to use a diode on the positive line to prevent current from flowing the wrong way?
Should I use a capacitor to reduce the current below 5v? If so what would you recommend?
Lastly, I read this line in the manual for the board that confused me:
"As a rough guide the most important thing is to ensure that the source impedance (Rs) of the analogue signal (VA) is less than 10k"
Do I need to pay attention to that in this automotive environment?
Any input or direction you guys (and gals) could provide would be greatly appreciated!
Chase
I plan on using the following device: "[PLAIN Manual.pdf"]http://www.pc-control.co.uk/images/Wasp Manual.pdf[/URL] to monitor 12v lines in a jeep and respond with various actions.
A simple example:
Monitor the 12v+ line for the vehicles brights, when it gets hot (hot meaning a current flowing through the line), enable a set of auxiliary lights.
The issue is that the board I am going to purchase, per the aforementioned link, can monitor up to 5v for input.
The solution i have come to is to attach a "+5V Fixed-Voltage Regulator 7805" between the 12v line and the input on the board.
I have a couple of questions though that I hope some of you experts can provide some guidance on:
Do I need to use a diode on the positive line to prevent current from flowing the wrong way?
Should I use a capacitor to reduce the current below 5v? If so what would you recommend?
Lastly, I read this line in the manual for the board that confused me:
"As a rough guide the most important thing is to ensure that the source impedance (Rs) of the analogue signal (VA) is less than 10k"
Do I need to pay attention to that in this automotive environment?
Any input or direction you guys (and gals) could provide would be greatly appreciated!
Chase
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