Ground loop problem?

Status
Not open for further replies.

Ok, sorry for that.

Carbon, keep the 100uF 35V (if it is not bad).
I saw a diode on the picture, test it too.
 
Where do your cameras get their power? Is there any way to provide their power through the same lighter socket?
 
Mneary, the cameras get their power through the quad processor unit. The quad processor unit has a single power wire coming out to cig lighter. I have tried wiring both the charger and processor together, but still the lines show.

Smanches, so do you think I should just go ahead and replace that 16v 470uf capacitor with 2 25v 1000uf capacitors? Should they be wired in parallel?
 
Last edited:
I tired placing 2 25v 1000uf capacitor inline, but the lines are still there. Does this mean its interference? What do you recommend i try next?
 
You should probably rewire all the AV equipment to use a common ground point to the frame of the car like a standard star grounding topology does. A cars electrical system was never meant to run AV equipment like this.
 
Last edited:
I meant inline before the charger plug, so both caps were parallel.

Sceadwian: what do you mean by a standard start grounding topology?
 
Star ground, all of the devices that have anything to do with the AV system would have to be connected to a SINGLE point on the car frame, not at different locations, that's how ground loops happen.
 
Have you ever gotten it to run without the lines? Almost starting to sound like a bad unit itself. 2000uF should have gotten rid of any ripple from the supply.

Could be interferrence, but I doubt its from the car. Do you have to have your ignition key on to get power out of the cigarette lighter, or is it powered all the time? Can you find a different 12v battery to power it off of?

If it always shows the lines, even when powered from it's own 12v battery, then there must be something wrong with the unit.

If you have gotten it work work without the lines, then start there and work backwards until it breaks. Then find a workaround for that particular problem.
 
It has always had the lines when I connect the charger. Its connected to a always on cigarette lighter.

The 2 1000uf caps should be wired in parallel, correct?
 
I feel like its making a ground loop because I'm connecting power to the charger which connects to the recorder and then a separate power source going to the processor and in which the processor connects to the recorder.
 
Status
Not open for further replies.

Similar threads

F
  • Question
Feedback Loop calculation for Voltage mode flyback
Replies
0
Views
1K
Flyback
F
Positive / Negative voltage circuit problem
2
Replies
20
Views
3K
ZipZapOuch
D
  • Question
Simple 4-20ma Current loop RF TX RX
Replies
9
Views
2K
rjenkinsgb
S
  • Solved
Bluetooth speaker ground wire connected to 4N25
Replies
3
Views
8K
rjenkinsgb
Ground Loops / Multiple Net Pours / Grounding vias
2
Replies
23
Views
4K
ThomsCircuit
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…