Auto Switching to Battery Module l Power-off Switching Module l Modem/LED Protection Switch-over. 

For long time I was in the problem about the auto changing circuit now after watching your video it is complete to me to think that now I can make this circuit easily. Thank you for kind of effort to teach

When the AC supply is there, will it also charge the battery?????

Some digital devices (modem , router , etc.) . The electricity cannot be turned off even for a moment. In this scheme, the power goes out for a moment when switching to the battery... To overcome this, you can add a 10,000 uF elco at the output.

Do we need that Output Diode also ? , It causes unnecessary voltage drop for output

Can you make an update and add a buffer so we can avoid the disconnection , you can see the led stops when it switches to battery, it can be a capacitor or something that can keep provide enough power untill that relay switches ?

Dose it charge battery while the main power source is on? Please answer and if no how to make it charge the battery while main source is on?

There's a time delay in switching..

what if I want to switch my DC supply of 24vdc 80A and Battery of 24vdc 100Ah to a load of 24VDC 80A. Can we use a relay here?

I realized that you used a relay but a 7809 voltage regulator but I didn't want to use the regulator but just the relay to do the switching, is it possible for me to use the relay without the regulator?

Thank 😊 You, It Worked Flawlessly. But Relay's Switching Mechanisms Works Slow Which Make Modem (Router) Switched Off While Switching Power Supply (Source) But AnyWay Again Thanks.

i have a router ups and it has a fault help me to fix it. the fault is whenever light goes off the ups restart the router but in new router ups work without interrupt. so which part i have to replaced to fix this issue in ups router

Can u told attached battery charged during power 220 volt is on or when wifi router is running with power 220 and attached battery with router

if you see the circuit carefully , it's really not 100% working. When you switching main to battery, the lights turning off for some milliseconds. The adapter stored voltage delaying the relay to switch. That mean the load will restart when power off. How to fix that ??

Isih simple nganggo dioda bridge, (kiprox sepeda montor), voltase diselisih 0,7volt nggon PSU, dioda ampere manut current (apik e amp x2).

Hlo sir When I tried this project , when the supply is given by adapter the light are not turning on only they are blink once and off... How to rectify this problem if you know pls tell it sir

Do you need all this? I used a relay and works flawlessly for my fridge in my car?

Can I used 2 ic for router & onu

Battary charge khud ba khud ho gi ya bataya please. Battery auto charge ho gei na agar wapad ki bajli as jati hai to?

I think this will work out really well with my small adruino projects. I like to keep them powered all the time, and a 9v battery, with a 5v relay, 5v regulator will work out just great. Does the battery always send power to the voltage regulator? or only when the relay switches to it?

What if i use 12v relay...but i need 9 volt...is this works?

Can you make it with optocoupler..

Awesome Project!!!! I wanna charge the battery at the same time with overcharge protection so is that possible here????

using a 5V relay; I want to do it for two already regulated 5V. Should I just put diodes on the coil ends? Can you help me

I did the connection as you mentioned but when the main in - out comes correctly but when the main line off comes to the battery then the voltage drops 1v shows please tell me why this is happening?

i have 100uf 35 volt capacitor. I need This project meking, but working this project???

If i want to continue with my wifi router I have solar system (12 volt DC battery? and Ac supply Is there anything changes ?

Hello sir, how to control ac 220 motors use this 5v realy

Veer ji battery charging kis tarh ho gi please reply ? Matalb battery 🔋

If i want 12 v out put so what can i changes in this

Can this circuit be used for solar panel and battery?

How to fix the delay in this circuit?

When we connect it on wifi supply switches sucessfully but wifi get restarted.... Please modifi it for interrupting power supply.

Can I use LM7812 If I am using a 12V RELAY and 12v 5Ah battery ?

Janab yah market mein taiyar hua mil sakta hai aur kis naam se

See the dc adapter end in the digram , the end on which you have connected dc adapted in normally close the moment we insert 12v there it get open and battery end get closed.in such a configuration this device can only wor with one input that is battery as soon as the dc adapter is disconnected , it will not work.

There is fluctuate... How can you eliminate that ? Suppose I am using wifi router in the load. Using it the load will restart . How to fix that ?

Hello sir I need cloosed loop baterry 12v lead acid to variabel voltage supply for me delco 12 si alternator I experiment lot with engines I use often amplifier ignition and hv ceramic capacitors so called plasma ignition but the unusual effect is that the starting charge on those old alternator goes up meaning I constantly back fead true the bulb unless I rev me engine more and the bulb goes off . So culd you advice me what to do? Shuld I use cloosed loop voltage supply and how much current and voltage is normal for those alternator regulators? Also I have problems with xenon bulbs,dual filament bulbs and interacting multipel relays to back feading alternator what diode type shuld I use to prevent undesired effects? Me alternator does bypass the integrated diode in the dashboard but still I think those ceramic capacitors might interfeare with ground potential on the alternator regulator . So I only use the pin 1 bulb the pin2 suposedly is the sence pin but its bent inside the alternator case. So I hoppe also if you culd point out where to put diodes on relays I use hella relays 2 pin buzzer,3pin blinker,4pin read defroster winscreen ,6pin wiper motor relays. Im doing currently entire wire harnest in the car its classic Opel from the 80s. So in the past I hade unusual problems like engine self aceletating when I turn lights on,or when blinker relay has corrosion on ground rear bulb holder and some black wire on key ignition starts to burn the engine behaves like Hit and Miss engine like some buzz coil so does the engine work in union with the blinker relay,also some times I get static chock and many times I end up with flat baterrys under charge or over charge the baterry. So I hoppe to finde some thing manuali that can tell the alternator when to charge and at what rpm range also I must finde solution for those relays stoping them to do that strange staff and posibly controler or dimner circuet for xenon bulbs . So I hoppe you understand me problem and can give me good advice . Also I wuld like to avoid useing the car chassys as ground due to rosting problems those cars normali have so I hoppe there are virtual grounding circuets. I have bunch of those mentioned relays so I wuld like to seperate them or at least control to some degree those anoying problems .

no router/router reboot?

How to do with solid state relay

Can you give me an idea for, when supply change from power supply to battery without delay...??

I tried this using 7812 and 50v 100uf and i have voltage of 8.43v. Trying if i can achieve a 12v for my router and CCTV box. What will i do to get 12v.

the voltage is not stable, it varies

12v out put kaise milega

what if I wants the ac circuit to charge the DC battery and it should still make use of the ac/DC supply how do I go about that

Does the circuit works for 5v? If yes what do I need to change

Plese provide correct circuit digram , the one in the discription is wrong

Can you use input voltage to charge battery?

How to bye

I want this circuit for 12v

Relay name?...

battery is not charging...

Add circuit for charge Battery

Circuit diagram

Too slow..

bad 100%

The voltage goes down when it swiches the power if I plugged my router then it restarts 🥲