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Recent content by Elex-factor

  1. E

    Dual polarity square wave generator

    I want to input this signal to an ADC of a microcontroller. Is it ok if I just use a resistive divider for this purpose?
  2. E

    Dual polarity square wave generator

    Hi I also wanted to know, if I want to reduce the voltage range from 0-10 V to 0-5 V, what kind of circuit should I use? Should I just use a resistor to drop down the voltage level or is there any better way to do that? Please help..
  3. E

    Dual polarity square wave generator

    Thanks for your help. I tried the above circuit and the voltage level shifted. However, the voltage range was much higher than 5 V even when the input was between -3 and 3 V. How could i shift down the output voltage? I am using 500 ohm potentiometer instead of 200 ohm. Also, what value should i...
  4. E

    Dual polarity square wave generator

    I have one more question. What if we need to step up the voltage level from the range of -4 V to +4 V to a microcontroller compatible voltage level between 0 and 5 V? Can we just use a resistor circuit or is there any other better way? Please suggest me some solutions.
  5. E

    Dual polarity square wave generator

    Thanks BradtheRad..The last circuit with a series capacitor worked for me. But do we need to change the capacitor and resistor value for different voltage input? For e.g. I tested using 12V input and got the square wave from -6 V to +6 V with the same capacitor and resistor value. If I give 15 V...
  6. E

    Dual polarity square wave generator

    Hi I am using a timer 555 ic to generate a square wave with a peak to peak voltage of 5 V. The square wave that i obtained has a peak to peak voltage range between 0 V and 5 V. However, I need a dual polarity square wave from -2.5 V to +2.5 V. How can I achieve that and what circuit should I...
  7. E

    [SOLVED] Getting an output voltage from the op-amp more than the supply voltage

    The current from the solar cell is as low as 10 mA. I hope the loss after the booster won't be too high. I think the LTC3105 booster is good for my case. - - - Updated - - - Thanks for the help. I think it'll be suitable in my case.
  8. E

    [SOLVED] Getting an output voltage from the op-amp more than the supply voltage

    Thank you for the help. Actually MC34063 operating voltage range is from 3 V to 40 V which does not meet my requirement because the output voltage from the solar cell is only 2 V. So I checked the booster from the same company and found NCP1410. I think it'll meet my requirement.
  9. E

    [SOLVED] Getting an output voltage from the op-amp more than the supply voltage

    Can you please suggest me some booster types? And also i wanted to ask, doesn't the booster need any power supply? The problem is that I can not use any external power supply. Please help...
  10. E

    [SOLVED] Getting an output voltage from the op-amp more than the supply voltage

    I want to use MAX44262 as a voltage amplifier. I am using a solar cell as a supply voltage which will be 2V. My question is can I use the same solar cell voltage as an input to the op-amp and amplify it to 3.5 V. I read somewhere that the output voltage of the op-amp can not go higher than the...
  11. E

    Voltage controlled switch for solar charger

    I need to make a circuit working between 1 V and 2.4 V. I want to make a solar charger that charges a capacitor C2 until it reaches 2.4 V, once the voltage reach 2.4 V, the switch is closed and the led lits up. At the time, 1st capacitor is discharging, I want to charge another capacitor C3...
  12. E

    High speed ADC with ethernet output

    Thank you for the reply..Actually I can not afford to loose data...for error recovery, can't we use some type of channel coding...although I am not sure that is the right way...Can't we use ADC and then save the output data in buffer till it gets filled and then transmit it by wireless. And it...
  13. E

    High speed ADC with ethernet output

    Hi I know I m just a novice but still I need to do this to complete my project. Please help me on this or show me the path. I've calculated my minimum sampling rate to be 1 MHz and the sampling size is 12 bits. So does that mean I need 12 Msps ADC? and how to get this to transfer through...
  14. E

    High speed ADC with ethernet output

    Thank u for all your valuable suggestions. I am new to this thing so I am really confused. My objective is to transmit 1 MHz transducer output in a real time using wireless medium. How can I make it possible? I think for 1 MHz transducer output, the ADC sampling rate must be higher than that...
  15. E

    High speed ADC with ethernet output

    Thank u for this valuable suggestion. So if i set my ADC to sample at 1 Msps, what will be the best way to transfer the ADC output through the wireless medium. Please help me on this. After looking at your comment, I think Xbee wifi will not be enough to transfer the data if the ADC sampling...
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