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by saishruthi
Sat Sep 02, 2017 7:34 pm
Forum: General discussion
Topic: Is there any BP sensor for RasPi ?
Replies: 1
Views: 1682

Is there any BP sensor for RasPi ?

Hi,

I am currently doing a project which requires a Blood Pressure sensor to integrate with Raspberry Pi. I am not finding any smart BP sensor to integrate with Pi.

Please suggest me if any

Thanks in advance
by saishruthi
Sat Sep 02, 2017 7:27 pm
Forum: For sale
Topic: e-Health Sensor Platform for Raspberry Pi
Replies: 10
Views: 25495

Re: e-Health Sensor Platform for Raspberry Pi

Hi,

I would like to integrate Blood Pressure sensor to Raspi and use that value for processing.

Is that possible ? Is there any link which explains how to integrate with RasPi ?


Please, help !!!
by saishruthi
Mon Aug 28, 2017 10:30 pm
Forum: General discussion
Topic: Raspberry Pi and Zigbee
Replies: 2
Views: 4180

Re: Raspberry Pi and Zigbee

My need is, I have an object which is in movement. GPS system is what I am planning. Location details obtained from GPS (module fixed over RasPi with Zigbee Tx) has to be sent to another RasPi with Zigbee Rx. This location will be updated in database. Is this good way or feasible way to do ? You nee...
by saishruthi
Sat Aug 26, 2017 12:26 am
Forum: General discussion
Topic: Raspberry Pi and Zigbee
Replies: 2
Views: 4180

Raspberry Pi and Zigbee

How to send location of an object to Raspberry Pi using Zigbee ?

I need to track location of an object and show its location in display.

Please, help.
by saishruthi
Thu Aug 10, 2017 12:14 am
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 20376

Re: Creating a 0-10V voltage range for ballasts

Thanks a lot Dan !!! I didnot ground supply and gave directly !! Right now I am using 1.V AA battery instead of PWM of Pi. I will integrating PWM soon. R3 = 12K R4 = 100K Now for 3.6v, I am getting output around 5v. 1.2v - 1.58v You have a gnd cable , blue wire between pin2 (-in) and gnd. Take it ou...
by saishruthi
Wed Aug 09, 2017 10:40 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 20376

Re: Creating a 0-10V voltage range for ballasts

Thank you for the detailed response How to determine power supply for OP-AMP circuit ? Should it be twice the input voltage range ? You want the op-amp to give an output between 0v and 5v. Have a look at the Texas Instruments PDF http://www.ti.com/lit/ds/symlink/lm124-n.pdf , particularly the diagra...
by saishruthi
Wed Aug 09, 2017 10:40 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 20376

Re: Creating a 0-10V voltage range for ballasts

Hi, Thank you so much for the help I have started with feedback and inverting resistor. But, I am not getting any output from pin 1 ? Please help me out pp.jpg p.jpg If you are using the LM324 TI specify a voltage output swing to V+ - 1.5V http://www.ti.com/lit/ds/symlink/lm124-n.pdf But personally ...
by saishruthi
Sat Aug 05, 2017 12:37 am
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 20376

Re: Creating a 0-10V voltage range for ballasts

Thanks a lot !!

I have one more clarification. Please help me out

1. How to determine power supply for OP-AMP circuit ? Should it be twice the input voltage range ?

danjperron wrote:
Fri Aug 04, 2017 10:44 pm
Should any value other than R3 and R2 be changed ?
Not really maybe R4 to be around 34K , (36K) for impedance matching.
by saishruthi
Fri Aug 04, 2017 8:16 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 20376

Re: Creating a 0-10V voltage range for ballasts

I am planning to use your same design and changed R3 to 52K and R2 to 100K. This will give gain about 1.52 Should any value other than R3 and R2 be changed ? OP-AMP.jpg The PWM max output is the digital 3.3V if you want 5V then you need a gain of 5V/3.3 = ~1.5 The OPAM gain is set by R3 & R2 with th...
by saishruthi
Thu Aug 03, 2017 7:43 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 20376

Re: Creating a 0-10V voltage range for ballasts

Hi,

I have similar requirement. In my case, I need to vary voltage range from 0-5v with gain 1.52. What changes should be made in the circuit ?

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