Yogesh Baj
- Sep 25, 2017
- 6
- Joined
- Sep 25, 2017
- Messages
- 6
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
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.
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."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
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 buttonSounds 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
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