Do you have a simple schematic for uninterruptible power supply?
What voltage and current?
AC or DC?
220V input AC and 9V output DC
9V UPS systems are on the market. This example would need 220VAC to 12V or 5V wall wart:
https://www.amazon.com/Battery-Backup-Uninterruptible-Security-10000mAh/dp/B07W8MCBMS
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In other words:
Purchase any existing 220V UPS.
Plug a 9VDC adapter into it.
This would be the most convenient and effective option unless there are specific requirements that are left implicit.
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Can you make an schematic diagram for that?
see @rsmls post above, the picture and narrative explains exactly how to do it. Since we do not know what you have or will purchase an exact photo cannot be shown.
Hi, @thomor
How much current do you need at 9V?
What do you need the UPS for?
Thanks.. Tom.. 
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Do you see how this unit has specifications?
What spec do you require?
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What ever you want, hehe
As long as its Uninterruptible power supply
Can you make a schematic using proteus Hehe I need your help everyone
See post #9
Well, with no specifications the simplest way you could do this is with any 220->9VDC adapter and a capacitor. Even a built-in cap, hehe.
Out.
No, I don't have Proteus. The schematic I provided is about as complex as it's going to get.
Look, I'm sorry I'm being flippant, but I think the problem here is that you seem to be implying (without making it explicit) that you want to build a UPS from scratch. We're all advising against it because it's (1) complicated and (2) unnecessary. The result is that no schematic is needed; the best thing you can do is to simply accept that if you want a UPS, you need to buy one. That's all there is to it.
I suspect this is just a wind up. Or maybe he wants a wind up UPS?
Gone
You just want a simple UPS affording you uninterruptable 9.0 VDC. While I have no clue where you are located I would be looking to companies like Alarm Saf and Altronix. They make exactly what you want. I see no reason to use a mains voltage UPS followed by a wall wart. DC backup supplies are common in alarm systems and cypher lock systems. Most output 12 VDC but you can easily get 9.0 VDC. They also maintain the battery, normally a 12 VDC SLA battery.
Personally I would run with the link Jremington was kind enough to provide.
Should you wish to "roll your own" a Google of " DC backup power supply schematic" will get you a dozen or more schematics.
Ron
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