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Help with power supply

AkbarMna

Jun 11, 2018
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Hi, so I'm working on a project that involves a camera and display.
I'm going to be buying the camera and monitor online, these are the power-related specs from the seller.
Can someone guide me in selecting a suitable battery pack to power them?

Monitor
- Power supply: DC 12V-24V
- Power consumption: 2W

Camera
- Working Voltage: DC9V-12V±0.5V

I've mainly worked with LED projects in the past, so I know a bit about how to wire those up.
 

Alec_t

Jul 7, 2015
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Welcome to EP!
According to those specs a 12V supply would suit both devices.
How much current does the camera require?
 

AkbarMna

Jun 11, 2018
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Welcome to EP!
According to those specs a 12V supply would suit both devices.
How much current does the camera require?

Hi, thanks for the fast response.
Here is all the information on the camera:

1.Image Sensor:7070
2.Video System: PAL/NTSC
3.Resolution: PAL:682 H*504 NSTC: 648 H*488 V
4.Horizontal Resolution:480TVL
5.Electronic Shutter:1s-1/10000s
6.SNR:>48dB
7.Min Illumination:0.01LUX
8.Video Output:1.0Vp-p/ 75Ω
9.View Angle:170°
10.Working Voltage: DC9V-12V±0.5V
11.Waterproof Rate:IP67

And this is a note from the seller "camera can only be connected to 12V, if you're wiring with voltage over 12V, the camera may burn."

[mod edit: cleaned up some unintended smileys]
 

Harald Kapp

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Nov 17, 2011
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Here is all the information on the camera:
This still lacks the information on current consumption or power dissipation :(
Do you have a model number, link to a website with more information or similar for us?
 

Alec_t

Jul 7, 2015
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Comparable cameras advertised seem to draw current in the 50mA-200mA range, so a small 12V SLA battery would do the job. However, given the seller's warning about over-volting the camera I'd be tempted to use a voltage regulator to take the camera volts down to, say, 9V.
 

AkbarMna

Jun 11, 2018
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Comparable cameras advertised seem to draw current in the 50mA-200mA range, so a small 12V SLA battery would do the job. However, given the seller's warning about over-volting the camera I'd be tempted to use a voltage regulator to take the camera volts down to, say, 9V.

Thanks for the advice, I'll take your advice and start off with a 9V power supply.
Thanks again.
 

kellys_eye

Jun 25, 2010
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No mention of how long the OP wants to actually RUN the system for on batteries.......

This makes a significant difference to the solution.
 

FuZZ1L0G1C

Mar 25, 2014
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If you have a DMM, and your camera battery or battery-cell housing is suitable, you can place a piece of stiff cardboard as an insulating barrier in the supply line (eg between batteries or one battery terminal and contact).
Then take 2 lengths of insulated wire (I use solid hookup wire), either side of insulator, so that the connected meter is in Series with the supply & camera.
For example, my DSLR Pentax uses 3x AAA cells, current varied from about 100-200mA, depending on function.
My purpose was to roughly calculate mAh vs. maximum workable time.
 

dave9

Mar 5, 2017
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Need more info about this project, purpose, weight/size/budget, frequency of use, link to monitor, etc, etc.

There are too many variable to make a good guess but if I were to guess, it would be use an 18V Li-Ion power tool battery pack, so it is convenient to recharge and some have a built-in state of charge display on them, and a 12V, 2A rated buck regulator board. You may not need the whole 2A, but margin is nice to have and such can be had on eBay for around $2 delivered.
 
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