Hello, I have been out of town for the extended weekend, so I finally got back and had some time to work on my project.
Battery ReplacementThis is now successful!
I changed a few things and I have finally replaced the stock battery with a much larger 18650 and so far it works perfectly.
(I changed the telephone connectors out for 1/8" phono- style jacks, perhaps this was atleast part of my problem)
No damage to the camera's I previously tested!
I found that with most of these chargers, the voltage can only be measured while under load.
Power Supply "C" (and "A") that use opto-couplers appear to keep a ~5.25 voltage Pre-load.
The "B" supply started at ~7.92 - 8.28v and I assume will fall to ~5v when under load.
Even the "A" supply started with this behavior though once I started replacing the zeners. (perhaps it required a slight adjustment of the reference resistor?)
I found that a fully charged lithium battery is closer to 4.1-4.2 volts, so I expect to find performance optimal closer to that voltage.
The motion activation worked, however - there was a "popping, and crinkling noise, and the audio was very muffled.
Also, there was some streaks and flashes in the video.
Thanks Steve,
I only found 1 supplier for the "LM1086CSX-ADJ/NOPB"
http://www.newark.com/jsp/search/productdetail.jsp?SKU=41K3388&CMP=AFC-GB100000001
I couldn't find anything for the "MC33269DT-ADJ"
Where do you buy these at?
Understood.
Can you give me any more detail about what kind of supporting components I will want to have on hand for these regulators?
Or, if you can point me to where I might be able to find a viable diagram it would give me an idea.
I might want to look into the small value capacitors if power quality continues to be an issue.
Thank You.
Battery Replacement
I changed a few things and I have finally replaced the stock battery with a much larger 18650 and so far it works perfectly.
(I changed the telephone connectors out for 1/8" phono- style jacks, perhaps this was atleast part of my problem)
No damage to the camera's I previously tested!
AC power
With that hurdle cleared I did a quick & dirty AC trial with a zener modified USB charger.I found that with most of these chargers, the voltage can only be measured while under load.
Power Supply "C" (and "A") that use opto-couplers appear to keep a ~5.25 voltage Pre-load.
The "B" supply started at ~7.92 - 8.28v and I assume will fall to ~5v when under load.
Even the "A" supply started with this behavior though once I started replacing the zeners. (perhaps it required a slight adjustment of the reference resistor?)
Video Test
I could probably rename this thread because of what I've learned since starting it, one reason is the 3.7volts.I found that a fully charged lithium battery is closer to 4.1-4.2 volts, so I expect to find performance optimal closer to that voltage.
Results
I got the camera to function correctly with a load voltage of ~3.7 volts.The motion activation worked, however - there was a "popping, and crinkling noise, and the audio was very muffled.
Also, there was some streaks and flashes in the video.
Next . . .
My next step is to use a regulator to better condition the power.However there are a plethora of low-dropout regulators which can regulate to voltages much closer to the input voltage. You might consider using one of them. I will mention a couple (based on nothing more than they are some I happen to have) MC33269DT-ADJ, and LM1086CSX-ADJ.
Thanks Steve,
I only found 1 supplier for the "LM1086CSX-ADJ/NOPB"
http://www.newark.com/jsp/search/productdetail.jsp?SKU=41K3388&CMP=AFC-GB100000001
I couldn't find anything for the "MC33269DT-ADJ"
Where do you buy these at?
Note that these are not a panacea -- they typically have much more stringent constraints on input and output capacitors.
Understood.
Can you give me any more detail about what kind of supporting components I will want to have on hand for these regulators?
Or, if you can point me to where I might be able to find a viable diagram it would give me an idea.
I might want to look into the small value capacitors if power quality continues to be an issue.
Thank You.