Connect with us

Constant voltage increment circuit

Discussion in 'General Electronics Discussion' started by Yogesh Baj, Sep 25, 2017.

Scroll to continue with content
  1. Yogesh Baj

    Yogesh Baj

    6
    0
    Sep 25, 2017
    I am a civil engineer and hence dont know anything about electronics so please help me. I need a circuit or a device which increases voltage for -250mv to +250mv at a rate of 0.1 mv/second
     
  2. AnalogKid

    AnalogKid

    2,476
    714
    Jun 10, 2015
    We need more details about your question.

    Are you talking about a circuit that takes in input voltage of -250 mV and translates it to an output voltage of +250 mV?

    Are you talking about a circuit that produces a voltage ramp from -250 mV to +250 mV?

    Something else?

    If the circuit has an external input, what is that input coming from? A sensor of some type, another circuit, etc?

    What does the output of the circuit do? Does it drive a motor controller, an alarm system, etc?

    ak
     
  3. BobK

    BobK

    7,682
    1,688
    Jan 5, 2010
    "increases voltage ... at a rate of...." sounds like a description of a ramp to me.

    My questions would be:

    What starts the ramp?
    What does it do after it hits the max?
    What is the load on the output?

    Bob
     
  4. Yogesh Baj

    Yogesh Baj

    6
    0
    Sep 25, 2017
    input voltage can be any constant power supply source but the output voltage should be a increasing voltage at the rate of 1mv/sec starting from -250mV and ending at 250mV.
     
  5. davenn

    davenn Moderator

    13,793
    1,938
    Sep 5, 2009
    1mV / sec or 0.1mV / sec as in your first post ?

    and what answers to the other questions you were asked ?

    the more you help us, the easier it is for us to help you
     
  6. Yogesh Baj

    Yogesh Baj

    6
    0
    Sep 25, 2017
    0.1mV/sec would best but is this is not possible then 1mV/sec can also work.
    Actually there are three electrodes in a conductive liquid I have to apply a voltage which increases at rate of 1mV/sec or 0.1mV/Sec (which ever possible) between 1 and 2 electrode and measure current between electrodes 2 and 3 every second. After it hits the maximum voltage the i will change one of the electrodes with another sample and repeat the same process . And so on with different samples. And by getting the voltage and current readings I have to plot certain graphs and do further calculations for my project. I have a device that can measure current so I just need a voltage source which increases as per my requirement mentioned above.
     
  7. Yogesh Baj

    Yogesh Baj

    6
    0
    Sep 25, 2017
    Actually there are three electrodes in a conductive liquid I have to apply a voltage which increases at rate of 1mV/sec or 0.1mV/Sec (which ever possible) between 1 and 2 electrode and measure current between electrodes 2 and 3 every second. After it hits the maximum voltage the i will change one of the electrodes with another sample and repeat the same process . And so on with different samples. And by getting the voltage and current readings I have to plot certain graphs and do further calculations for my project. I have a device that can measure current so I just need a voltage source which increases as per my requirement mentioned above.
     
  8. Yogesh Baj

    Yogesh Baj

    6
    0
    Sep 25, 2017
    I don't understand what ramp is
    After hitting max it should reset and carry out the same process but with different sample
     
  9. AnalogKid

    AnalogKid

    2,476
    714
    Jun 10, 2015
    Sounds like a potentiostat.

    What starts the ramp? Press a button? A computer signal?

    After one ramp. does the output sit at +0.250 V, return to 0 V, or what?

    ak
     
  10. Yogesh Baj

    Yogesh Baj

    6
    0
    Sep 25, 2017
    A button and after one ramp is complete at +0.250 V it returns to -0.250 V then I connect a different sample and the ramp starts again from -0.250 V after pressing the button
     
  11. davenn

    davenn Moderator

    13,793
    1,938
    Sep 5, 2009
    and what tells it to start the ramp again ?
    you will need a control process in there .... a microcontroller etc
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-