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cOOter
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« on: May 23, 2016, 09:59:17 PM »



This post is for Number 7 who's wanting some remote security ideas.

Per our PM's, this is a basic setup.

With just the camera (1) and the 5v USB powebank (2) I can leave this anywhere
in the yard and it will run for 8+ hours. (haven't tried it longer yet)

Powrbank is one of those cheap 12000 mHa jobs for about $20.

Phone (3) in the picture is a pretend portable wi-fi hotspot.

Most old apple and android phones can be used as portable wi-fi hotspots and usually charge off 5v.

With 1, 2 and 3, this camera can been viewed online from anywhere in the world.

Trouble is 2 and 3 eventually need charging  sad5

A good car battery and at least a 20 watt 12v solar panel and cheap charge controller would keep
1, 2 and 3 going around the clock.

One of those cigarette 12v socket (4) things with inbuilt 5v USB outputs are only a few dollars on eBay.

In your case all you'd need is 1, 3, 4, a solar panel, controller and 12v battery.

Some cheap control charges have inbuilt 5v outlets as well.  Doctor

http://www.ebay.com.au/itm/10A-12V-24V-Autoswitch-LCD-PWM-Solar-Panel-Regulator-Charge-Controller-Timer-USB-/171944784684?hash=item2808b5332c:g:npAAAOSwEetWAhSZ
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« Reply #1 on: May 24, 2016, 11:56:31 AM »



 Number 7 Regarding the 5v solar panels you bought, you really need
more voltage - in the photo I joined two garden lights (1, 2) together
that combined in full light do 12v with fark all amps. (about 100ma)

That raw 12v goes into the cheap $1 voltage regulator (3) which brings 12v
the down to a safe 5v that then goes into the 5v battery bank (4)

Image (5) is what a voltage regulator looks like. They coast about $1.85 at Jaycar but are only
good for about 1amp

http://www.jaycar.com.au/Active-Components/Regulators/Fixed-Voltage/7805-%2B5V-1A-Voltage-Regulator/p/ZV1505

My camera will run on 5v 1 amp, but it's specs say it wants 5v 2amp

Your dongle wants another 2 amps at 5v

This is where a 12v solar panel and car battery with 5v converter gives plenty of amp head room.

I usually run my cameras off 240v, but have the battery pack in-line in case of blackout.

That 5v solar rig in the photo is usually in the cupboard as it's so slow charging at 100mHa,
which at that rate would take 12+ hours to charge that 12000 mHa battery bank.

 Doctor

Note: between my solar panel and the battery there should be a small 'diode'
(only lets electricity travel in one direction) as well to stop the battery from discharging
when the sun goes down. In the above example that power pack has one in it.


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« Reply #2 on: May 24, 2016, 12:21:00 PM »

The 3 terminal voltage regulator you have pictured, which I gather is a typical LM7805, is only good for 1 amp with adequate heatsinking.

Best place to find cheap heatsink is out of an old TV you find on the side of the road.

You are better off using one of those little switching modules we got from China. (buck one for going DOWN in voltage).

Sorry don't have a picture. I think they were like less than $2 each with free postage.

They will supposedly handle more current, and will be far more efficient as well, and with solar you need efficiency.

 Grandpa Wood Chopping
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« Reply #3 on: May 24, 2016, 12:30:08 PM »

I dont think I really need this camera to do night surveillance (i reckon the little brats are doing their dirty business in broad daylight) so I am hoping I can use straight up 5v solar panel to power it during the day and turn off at night. As long as the camera has auto power on function as the internet dongle does it should all turn itself back on again when the sun comes up.

 toothy4

The area is set for a new mobile phone tower - hopefully will supply 3G coverage so I can use the trail cam to send MMS to my phone when it sees movement

A full-time caretaker with a shotgun would be a better way to secure things...... Australia Flag thumbsup
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« Reply #4 on: May 24, 2016, 12:52:03 PM »

Yes I forgot to mention heat sink stuff  thumbsup

LOL, my piss weak 100mHa garden solar cells never make anything hot.

Good idea on the adjustable step down converter  Wood Chopping

Here's one of mine that will take up to 30v in, and has been adjusted down to 5v out.


The blue rectangle with the gold screw is the adjuster, Number 7.

Only cost about $2 each. I think they are good for 3 amps per unit.

My piss weak 12v 100mHa garden panels wont run them though,
thus why I opted for the weaker regulator.

I reckon Number 7 should man up, and bare minimum, car battery, 12v 20 watt panel
and two (one for the cam and one for the router) of the above voltage step down gadgets.

 Crazy
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« Reply #5 on: May 24, 2016, 12:55:49 PM »

Yes the cameras auto power on.

Each trail cam need it's own SIM card? That would be a bugger. I'd nick ya SIMS and make free phone calls  Crazy

Ya got an eBay link to the 5v panels ya getting?

 Cool Chicken
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number7
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« Reply #6 on: May 24, 2016, 01:14:54 PM »

http://www.ebay.com.au/itm/111977968149?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

These are the panels I bought and have high hopes for

Yer each trail cam has its own sim and own number. I can control it by sending SMS to take a pic, turn on/off, and couple other things

If it is stolen the sim can be tracked for its location as I understand
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« Reply #7 on: May 24, 2016, 01:25:13 PM »

So I bought 3 at 160mA each

If I connect them in parallel I should be able to achieve almost .5A

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« Reply #8 on: May 24, 2016, 01:56:51 PM »

Camera needs at least 1 amp

Your hotspot needs over 1 amp (old phone hotspots draw less)

Yet you're going to run both direct from two $1 solar panels putting out less than 1/2 an amp in full sun light?

 Dim Sim
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« Reply #9 on: May 24, 2016, 02:09:09 PM »

When you do the sums it looks like I might need to get some more solar panels

                             blob8

Lucky those nice Phillipinos sell em for $1             sunny
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« Reply #10 on: May 24, 2016, 02:31:51 PM »

Yeah ya could buy more 5v cells, but won't that get messy mounting them all?  read2

Stick 'em onto a big flat board or roof with silicon I suppose. Gotta keep water out.

Basic, waterproof and tidy 12v 10watt panel free postage from NSW is $23

http://www.ebay.com.au/itm/MINI-10W-SOLAR-PANEL-CARAVAN-CAMPING-POWER-CHARGING-KIT-12V-HOME-BATTERY-/172172879804?hash=item28164da7bc:g:uKkAAOSw41xXO6b2

The 12v 0.58A current should at least double when converted down to 5v (need  Wood Chopping input here)

But even so, 1 amp isn't really enough.

I have a spare 12v 10amp max solar regulator here ya can have for free if needed.

 Cool Chicken
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« Reply #11 on: May 24, 2016, 04:04:43 PM »

I just looked at that solar panel.

Its 10 watts PEAK.

And by my calculations more like about 8 odd watts.

Look at the photo of the back of it, output voltage 17.4 volts and current 0.47 amps, gives around 8.2 watts in full midday summer sunlight.

The 21 odd volts is unloaded IE no current being drawn. Maximum power output point is the 17 odd volts.

Drop that by around a third for average output over a day.

Those little switching converters are around 90 odd percent efficient so 8.2 watts in looses 10 percent being converted to 5 volts out so you'd get 7.4 odd watts or about 1.5 amps out at 5 volts.

I'd get at least a 40 watt panel if you want to draw 2 odd amps out with a switching converter.

The little ua / lm 7805 have really poor efficiency at those currents and voltages, basically the difference in input voltage, up to 21 odd volts in this case, and output voltage, 5 volts, is WASTED as HEAT  and you get NO extra current output from that which you put in, IE 0.47 amps in this case.

My thoughts anyway  Crazy

 Smoking Wood Chopping Grandpa

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« Reply #12 on: May 24, 2016, 04:47:51 PM »

Marget that  Wood Chopping

In an earlier PM I suggested a 40 watt panel as well.

7 doesn't what to spend too much in case the thieves nick it all.

I hear Dicksmith workers need jobs, and work for peanuts.

A new flea collar, water bowl and a months supply of Chum might tempt one
to play security guard for a while?

 Tears
I can just picture a bald skinny tooth pick security guard trying to fend of thieves.
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« Reply #13 on: May 24, 2016, 06:06:36 PM »

Ahh yes anyone even an unemployed bald skinny guy with a camel toe would be effective against the piss weak thieves

I like that panel for $22 odd - maybe look into buying just as a battery charger

I currently use a vintage solar panel rescued from the rubbish many years ago - pumps out about 36v in full sun until its hooked up to a battery. Its still good enough to keep a big 4b battery charged with the 12v fridge running for a week.

More Phillipino $1 solar panels i reckon

Cover the whole roof with em Smoking
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« Reply #14 on: May 24, 2016, 09:49:41 PM »

Yeah stick 'em on good so the little buggers don't bother stealing them.

Just gotta make sure water doesn't contact the wires in the back.

Keep an eye out for a nice secondhand clear sheet of perspex
ta cover them with.

I think I still have the front of a 42 inch sony TV here ya can have.

It's just an alloy frame with the glass.
I'll get the whipper snipper out tomorrow and see if I can find it under the Singapore daisy.

I was going to buy a 100 watt DIY kit and make my own with it,
but the ready to go jobs got real cheap and bought one instead.

 kermit
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