how to disable auto power off feature in an electronic calculator because most of the calculators nowadays are electronic….I am hoping for your response…thank you in advance
You said that in the calculator we have to press “=” sign after pressing 1 then in normal calculator wlif do this thing we didn’t need any circuit,,,,,,,
December 31, 2010 at 6:47 am
vikas
u did a gr8 job
October 3, 2011 at 7:29 pm
onyango
nice project
October 25, 2011 at 3:50 am
alan
nice project….i also did it and it was awesome only i had to look out for a dark place as the ldr sensitivity was a slight of a problem.
October 16, 2012 at 9:31 pm
SHRIKANT VERMA
About of all components are used in object counter used in LDR and Calculator
December 19, 2012 at 5:52 pm
sgvinoth
i done this project.i realy got good o/p.
March 10, 2013 at 4:31 am
Dep
What can I use instead of the BD139 Transistor??
March 10, 2013 at 8:42 am
Sagar Sapkota
You can use any other transistor that can drive the relay.
March 10, 2013 at 9:04 pm
Dep
So something like SL100 or BC 337 would work?
October 25, 2013 at 5:04 pm
NANCY JANI
Very good idea and project..i did it as my 3 semester project…but sensitivity is little bit problematic.
November 24, 2013 at 5:08 pm
SAM
i have not found any such caculator which has to work as counter. what can i do to use calculator as counter ?
November 24, 2013 at 5:09 pm
SAM
plz rep asp
May 28, 2014 at 11:06 am
rken
how to disable auto power off feature in an electronic calculator because most of the calculators nowadays are electronic….I am hoping for your response…thank you in advance
July 30, 2014 at 3:36 am
Anushka
Can i replace led & ldr with IR light & IR sensor?
October 30, 2014 at 8:37 am
sachin
You said that in the calculator we have to press “=” sign after pressing 1 then in normal calculator wlif do this thing we didn’t need any circuit,,,,,,,