Discussion in "Project Addition or Changes" started by    ugoo5000    Sep 23, 2011.
Fri Sep 23 2011, 11:31 AM
sorry for using raw hand in drawing this diagram,i have learn allot from this web site and want to contribute mine for others to learn from. i build this u.p.s from the scratch. the device has inbuilt charger incorporated in the same transformer and automatic change over. any question will be answered accordingly.
relay1 takes charge of input live and the inverter out to the output,meaning its automatic changeover,relay2 takes care of the charging,relay3 and relay4 cares for the neutral change over to avoid back emf from the transformer then relay 5 cares for the sensor relay, the relay that off the inverter when there is commercial electricity

Fri Sep 23 2011, 11:37 AM
@ ugoo5000
i appreciate ur effort and i also know that ur good in power electronics
can u make a schematic in any software like orcad etc
then it would be better for members and also make a little word report if u can
Fri Sep 23 2011, 03:20 PM
here is the full drawn diagram. ask any question i am there for u
Fri Sep 23 2011, 06:09 PM
@ ugoo5000
now schematic looks cool
Fri Sep 23 2011, 06:54 PM
Ajay is a ful working diagram.that is a work a make money from.add it up in ur project download for my friends to download.i hav many to add up,becouse i hav learn alot in other peoples work and urs inclusive.i am good in power electronic and digital electronics but stil learning 8051 with respect to assembling language.thanks
Fri Sep 23 2011, 07:27 PM
Thank you for your contribution.

Nobody should worry about posting hand drawn diagrams,
all great ideas start that way

As a matter of fact your hand drawn diagram may be better,
you seem to have made an error connecting the drains and gates in Inverter1.pdf

[ Edited Fri Sep 23 2011, 07:32 PM ]
Fri Sep 23 2011, 09:03 PM
I wil check and correct that tomorow. Thanks for reminding me
Fri Sep 23 2011, 09:18 PM
it had been corrected. download to see it. thanks for reminding me
Tue Sep 27 2011, 12:10 PM
Nice work ugoo,

How you are controlling the relays switching. From schematic all relays will be ON at a time.
Could you explain us with some more details, like in block level.

Tue Sep 27 2011, 01:39 PM
@kiran,all the relay wil on at the same time. When that happen,that means when there is comercial electricity,relay 1 wil change inveter to comercial electricity to the output,relay2 switches the transformer for chargeing,relay4 connect neutral from commercial to the charging transformer to complete the circuit, relay3 connect the neutral input to the output socket,relay5 switchs off multivibrator to put off d inveter,when the power goes off,relay5 rebounce to triger the mv on, relay4 cutoff d neutral input from com electricity,relay3 stil mentains d neutral output to d socket,relay2 cut the charger off,relay1 change inverter to the output socket. All these happens in micro sec.the system is called automatic change over

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Wed Apr 24 2019, 12:30 AM
Kenneth Evans
Kind Regards,
Sun Apr 14 2019, 10:52 PM
@hassan malik post your problem in the "General help Guidance and Discussion" forum
Sun Apr 14 2019, 05:06 PM
please send me code to interface atmega32 with 24c1024 serial eeprom
Sun Apr 14 2019, 01:33 PM
hassan malik
hello sir i installed proteus 7.8 professional on window 7 ultimate and window 10 but there would be same errors onn both windows. the error is bad license key.please any one help me
Sun Apr 14 2019, 01:32 PM
hassan malik
hello sir i installed proteus 7.8 professional on window 7 ultimate and window 10 but there would be same errors onn both windows. the error is bad license key.
Sat Apr 06 2019, 05:59 PM
@deshrar. Please post your question in 8051 forum
Sat Apr 06 2019, 07:43 AM
hallo mam.. i have downloded gsm notice board code its running fine on lcd but how so send msg to the module . i mean format of password and msg.. thank you
Wed Apr 03 2019, 04:38 PM
Can i see the circuit diagram for the music tone library 8051 project?
Wed Apr 03 2019, 02:45 AM
@Prudhvi. Please post your request in 8051 forum
Tue Apr 02 2019, 01:02 AM
Prudhvi reddy
Can you please help me writing code for gsm to send a particular SMS after pressing a key in 4×4 keypad ..in 8051



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