/diy/ - Do It Yourself

>>680754
telling me what to do

are you 12 or something?

>>680738
Please take pictures of the "connection" so I can help you out

Also take pictures of the walls...

>>680737
Removable mode
1) Get some gift wrap, and wrap the door, the floor and the inside of the door frame with it.
2) Rewrap it again
3) Do as it says on "Extreme mode"

when you want to remove the plaster, you may just break it and the door will remain intact.

No need to paint it, clean it or whatsoever.

As I said, plaster is cheap

>>680709
Easy mode
1) Remove door knob
2) Install Dead lock

Normal mode
1) Buy some MDF wood
2) Get as much paper as you can (old newspaper, insulating news paper or insulating foam)
3) Cut the MDF board in a way that it can fit in the inside of the door frame
4) Fill the space between the MDF board and the door with paper or insulating foam
5) Lock the MDF board in position using nails (it doesn't have to be perfect)
6) Get some plaster and pour ir in the board
7) With a piece of wood, straighten that plaster all over the MDF board until it looks like a solid wall
8) Paint it!

The way you supouse to do it MODE
1) Remove the door and the door frame
2) Put some bricks in between
3) Put some cement and plaster on the outsides
4) Paint it

Extreme hardcore mode (not for the faint of heart)
1) Get some clear and 3" wide tape.
2) Start putting tape from the floor to 3 inches below the top of the door frame
3) Do the same on the other side
4) Pour plaster (1 foot) and wait until it dries (2 days)
5) Repeat until you reach the top of the door frame
6) Paint everything

Plaster is cheap, so go ahead.
and it is really easy to remove (just break it)

>>680732
I agree
Grundfos sucks
but Zoeller is noisy and grundfos barely makes any sound.

>>680709
Do you want to do it permanently or temporaly?

>>679028
A/C broke

check the capacitor and fuse

Dryer broke

check the capacitor and fuse

>>677818
Supercapacitors can last 500,000 to 1,000,000 charge/discharge cycles

That's 9589.04 years in my case

Maybe I am missing something on that math... How else can they wear out?

As far as I know, supercapacitors don't have an expiration date. They just wear out if they are not correctly managed or if we keep using them.

What could possibly go wrong?

>>677798
further reading:

http://serverfault.com/questions/29556/what-is-the-lifespan-of-an-typical-ups-battery

on this particular installation area, light goes off once per week, and it lasts like 30 minutes.

The maximum time we have had a black out, was 1 hours tops.

>>677798
a real UPS with Supercapacitors?

been there done that with normal UPS

they last 2 years TOPS

I need it like, forever!

I don't want to return to the old installation place.

>>677725
The only "advantage" I see with using caps, is that you don't have to replace batteries.

Think on a scenario that you may need to install an Access Point on a rural area, so you have NO ONE to contact when you need to replace batteries.

That's the only advantage I see so far while using Supercaps.

Expensive $$$$ and
Low capacity are the 2 main disadvantages that I could live with... as soon as I don't have to replace anything, I will be ok with that.

Think on it as a Install and Forget it.

Zero maintenance or whatsoever

>>677720
lol
in tijuana you can get ultra capacitors for cheap

I live in San Diego btw

>>677716
I wanted to use Ultracapacitors because there is no "danger discharge zone" on them. Unlike rechargeable batteries, you can discharge them till 0.00000 volts and charge them again and NOTHING will happen. And the charge/discharge cycles are way more than batteries charge/discharge cycles.

I was thinking on using this as a long time solution for my devices, since I won't be able to physicalle be "there" in order to change the batteries.

>>677714
I will just drop the whole idea

I tried to make it work using only resistances... and it won't be useful.

It will take HOURS before the AP can even power up.

If we "assume" that the capacitor is alredy charged up, it would work on the first shut down. But if the shutdown lasts more than 1 hour, it will take 20 hours for the Access Point to go back online.

so no

>>677711
Then I guess I will also need

*grabs sunglasses*

a Joule Thief

*Puts on sunglasses*
*Random crows yells YEAAAHHH!!!!!!!*

>>677683
You where right

I was wrong

That 3kF capacitor looks like a short circuit

It will take LONG time to charge

>>677686
Now I can see the problem....

Either I find how to power my access point using 500mAmps or find a 2 Amps Wall Wart.

Otherwise it won't power up until the capacitor is charged.

Let's assume that my Access point works with 500mAmps.

Would this circuit >>677685 be enough to power up my Access Point and charge my Capacitor?

Lets assume that I am using 2 capacitors (5.4 volts) and R1 = 5 Ohms.

>>677685
R1 must match the amperage that my Wifi access points needs (which is 1 amp)

so, R1 will be 5 Ohms

R1 CAN'T be higher than 5 Ohms, or it won't deliver 1 Amp

>>677683
I'll try doing that
(assume I am using 2 caps in series)

>>677680
I connected a large capacitor into my 5 Voltage regulator ( I was messing around with a random AVR Circuit in my protoboard).

My circuit was doing nothing but blink a LED.

I don't renember the capacitance that I was using, but I am pretty sure it was DEAD before I power up my circuit.

When I powered it up, it instantly started to BLINK.

But when I disconnected it, it would keep blinking for more than 2 minutes.

That's my inspiration on looking for something as simple as a paralell capacitor in order to power an access point on power offs.

I understand EVERYTHING >>677680, that you are saying, but I will give it a try anyways. I am 99% sure that you are right, but I want to see it on real life for myself =)

If for some 1% reasons it works, I will post the results here. I'll try to be sure to empty the capacitor before doing this.

>>677671
Well, my wall wart gives me 5 Volts @ 1 Amp

I have tried connecting 5 Volts @ 667 mAmps, and it does not work.

So My guess is that the AP consumes something in between 667mAmps to 1 Amp. So, my worst case scenario is that it uses 1 Amp.

2 or 3 seconds wont be enought for my purposes =) But if that is what it is, then I can't do anything about it.

https://www.youtube.com/watch?v=EoWMF3VkI6U

>>677662
Hey man, don't worry =)

I have been googling diagrams on how to achieve this and yes, I have seen people using many other components, not just resistors.

I just wanted to know if it was possible to achive something as close as possible, using only resitors. (Its my personal challenge)

Kinda like making your own FM Mic transmitter using only 1 transistor.

>>677653
I want to make my own "Poors man UPS"

Maybe I should write it in CAPS

POORS MAN UPS

>Adding a super cap in parallel with your voltage source does absolutely nothing for efficiency.

>efficiency

>the cap shown has a maximum voltage of 2.7v

Of course I will be using either 2 caps or a caps that could handle 6volts at least

>Really the only thing you need to know is OHMS LAW and how to apply it in your invention.

Thats all I wanted to know

now I know I must only add a resistor that could handle the given wattage and Volts * Current Usage.

>proves your incompetence

chill up buddy

here, have some random map so you can calm down

=)

I want to make my own "Poors man UPS"
I need this on a WiFi Access point

So far, I figure it out how to connect the Access Point, the Super Capacitor and the Wall wart. But I think that if I leave it as "it is" (without any resistance).

Could this setup charge the super capacitor? Do I need to add some resistors somewhere?

I want it to be as simple as possible

No Diodes, regulators, transistors or whatsoever. I just want it to keep it simple.

And yes... I know... it won't be efficient, but it will still be a poor's man UPS.

Think of it as a Joule thief... it is far from being efficient, but we still use that circuit like EVERYWHERE.

Thanks for reading.