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the shown diagram i have used as current to voltage converter in the case of photodiode. pin 1 corresponds to cathode of photodiode and pin 2 corresponds to anode which is grounded.
i am using INA128... please help me about the working how the current is converted to voltage in this case...
PIC16f73 ADC problem
my ADC is not working for values below 0.5..
it is showing 0V upto 0.5V and after that suppose for 2.2 volts it is showing 1.7 volts..
whst is the problem..
please help me..
thnx in advance...
i am using a transformer which generates ±15V and +5V using 7815,7915 and 7805.
this supply is used to drive my circuit which consists of 6 quad opamp IC's and other passive components...
everything is build up on PCB..
now i want to measure current of whole circuit...
Re: transformer heating
my 7805 is connected to the transformer doesnt heat up...
but there is one thing which i have used is i m using two different transformers of different ratings which gets supply from same mains point...
can that be a problem???????
my transformer is heating
i am using a 9-0-9 500mA transformer which drives my pic 16f73 and a LCD 16*2 attached to it.
when i switch on the power within 5 min my transformer heats up tremendously..
i am not able to understand the problem..
please help me soon..
i m stuck at this...
Re: problem with LCD
i got the solution..
now i have used the ground pin of three pin power plug connector as ground of all the circuit..
and the circuit starts working...
how important is the use of tht three pin plug ground in all the applications?
please let me know
thnks to cameo_2007 and...
Re: problem with LCD
it seems problem of ground as i am using two transformers.
actually 1 transformer is used for generation of ±15V and other one is used for 5V generation which is used for µC board.
tranformer used in ±15V generation is center tapped while other one is not used in center tap...
problem with LCD
i am using analog and µc board separately.
i am giving my analog inputs to ADC of µc.
µc is interfaced with a LCD display.
Power supply to both boards is from different sources(transformers).
when i use both boards independently they work.
as soon as i connect both boards...
i am using two analog inputs from one board which is given to a pic µc board...
µc board is interfaced with a LCD..
my problem is when i am switching on the supply of analog board my µc board gets a minimal supply which switches on my power LED...
and LCD's backlight partially on... then when i...