hw much volt should be given to PIC to have high output?

[swethamenon]

2.2v to 5v??
if the output from the sensor which is to b fed to PIC is less than 2.2 v will it work??

 

[ebclr]

PIC is a name for a extremelly big family off devices from microchip, some have comparators inputs, other only logic levels, Also the main supply can be 5V or 3,3 according the devices, this means the question is to wide.

Take special note on DC CHARACTERISTICS: I/O PIN INPUT SPECIFICATIONS on the datashet off the device you plan to use, normally they are writed as a 0,7 to 0,8 VDD to be considered level high , these means that for 3.3 v power supply level one mill be 0,7 to 0,8 * 3,3 same apply for 5 V devices.

As a last resorce you can use auxiliary circuit between the input and your sensor as a level matching, normally one transistor and 2 resistors.

Regards

 

[Tahmid]

2.2v to 5v??
if the output from the sensor which is to b fed to PIC is less than 2.2 v will it work??

What is this 2.2V to 5V you're talking of? It sounds like an operating voltage range, but you should clarify.

You also need to tell us what type of sensor you're talking of, what the interface is (digital - 0/1 or analog - PIC ADC used or PIC comparator used) and what is the range of output.

 

[swethamenon]

What is this 2.2V to 5V you're talking of? It sounds like an operating voltage range, but you should clarify.

You also need to tell us what type of sensor you're talking of, what the interface is (digital - 0/1 or analog - PIC ADC used or PIC comparator used) and what is the range of output.

Using hall effect sensors for voltage and current measurement from solar panel..they scale down the v&i according to the ratio.max voltage from solar 30v n current around 12v..mini voltge got when took an intensity was 0.57v.(from panel) sensor will again scale down.so my doubt is regarding the minimum analog i/p value given to PIC??heard that 2.2v to 5v it read as high..whatever values lower than that take as 0.is it write??if so will it read the o/p from the sensor?

 

[tpetar]

Using hall effect sensors for voltage and current measurement from solar panel..they scale down the v&i according to the ratio.max voltage from solar 30v n current around 12v..mini voltge got when took an intensity was 0.57v.(from panel) sensor will again scale down.so my doubt is regarding the minimum analog i/p value given to PIC??heard that 2.2v to 5v it read as high..whatever values lower than that take as 0.is it write??if so will it read the o/p from the sensor?

Best explain what you want to do, parts what you plan to use, and circuit if you have.

Hall sensor for current can show for example ACS712-20 (for up to +-20A) negative and positive current in range 0,5V to 4,5V. 2,5V is 0A -20A is 0,5V and 4,5V is 20A.

 

[jayanth.devarayanadurga]

Post a datasheet of your hall effect sensor. You have to use ADC and not digital I/O. Your sensor gives analog output. So if you use MCU which works at 5V then your adc input value can be between 0v and +5V.

 

[swethamenon]

Post a datasheet of your hall effect sensor. You have to use ADC and not digital I/O. Your sensor gives an[/HTML]output. So if you use MCU which works at 5V then your adc input value can be between 0v and +5V.

Current Transducer LA 25-NP
For the electronic measurement of currents : DC, AC, pulsed,
mixed, with a galvanic isolation between the primary circuit
(high power) and the secondary circuit (electronic circuit).
Electrical data
IPN Primary nominal r.m.s. current 25 At
IP Primary current, measuring range 0 .. ± 36 At
RM Measuring resistance RM min RM max
with ± 15 V @ ± 25 At max 100 320 W
@ ± 36 At max 100 190 W
ISN Secondary nominal r.m.s. current 25 mA
KN Conversion ratio 1-2-3-4-5 : 1000
VC Supply voltage (± 5 %) ± 15 V
IC Current consumption 10 + IS mA
Vd R.m.s. voltage for AC isolation test, 50 Hz, 1 mn 2.5 kV
Vb R.m.s. rated voltage 1), safe separation 600 V
basic isolation 1700 V
Accuracy - Dynamic performance data
X Accuracy @ IPN , TA = 25°C ± 0.5 % eL Linearity < 0.2 %
Typ Max
IO Offset current 2) @ IP = 0, TA = 25°C ± 0.05 ± 0.15 mA
IOM Residual current 3) @ IP = 0, after an overload of 3 x IPN ± 0.05 ± 0.15 mA
IOT Thermal drift of IO 0°C .. + 25°C ± 0.06 ± 0.25 mA
+ 25°C .. + 70°C ± 0.10 ± 0.35 mA
tr Response time 4) @ 90 % of IP max < 1 μs
di/dt di/dt accurately followed > 50 A/μs
f Frequency bandwidth (- 1 dB) DC .. 150 kHz
General data
TA Ambient operating temperature 0 .. + 70 °C
TS Ambient storage temperature - 25 .. + 85 °C
RP Primary resistance per turn @ TA = 25°C < 1.25 mW
RS Secondary coil resistance @ TA = 70°C 110 W
RIS Isolation resistance @ 500 V, TA = 25°C > 1

LA sensor for current