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  1. S

    UART problem for PIC microcontroller

    I am using pic24fj64ga002 controller UART. I am able to communicate with PC when I transmit/receive one character to PC. But my intention is to get a string from PC and process it in microcontroller. However, I am getting a weird problem. When I am sending more than 5 characters, eg. abcdefg, I...
  2. S

    ECG circuit development

    Thanks Steve. The one thing that I am surprised about is that INA 333 is enlisted as single supply opamp by the link http://focus.ti.com/apps/docs/viewdevices.tsp?blockDiagramId=6163&blockId=7997&designOptionId=8512&appId=464 . But in actual sense, its difficult operate in that mode.
  3. S

    ECG circuit development

    I am a newbee in using opamps and i want some help in building instrumentation amplifier using opamp. I am planning to use INA 333 opamp for amplifying the low voltages(in microvolts) given out by sensors. But as my device is battery operated, i am unable to provide +(7 pin) and -(4 pin)...
  4. S

    generating voltage source of 100microvolts to 1mV

    The thing is that , the waveforms are the outputs of the sensors applied on body parts- eg.stomach. Now, we can not use human beings (also, test rats are difficult to get), so, i am trying to produce the signals by doing some circuit which will emulate the output given by sensors. So, its a...
  5. S

    rf 433mhz and avr

    yes, it looks to be correct to add the addresses of remotes in Rx and it checks the correct one that matches when a remote tries to control.
  6. S

    generating voltage source of 100microvolts to 1mV

    @Militoy Yes, you are right. 50uV is an enormous amount of noise to be riding on a 100uV. But the waveforms observed at various membranes of stomach are of that form. Intention is to extract the peaks which have the actual signal. Rest all is noise. Please refer to the image attached. My signal...
  7. S

    generating voltage source of 100microvolts to 1mV

    current- order of milliamps. This voltage is a kind of simulation since we can not use rats or humans frequently in labs. This signal will be amplified and processed. noise levels- around 50 microvolts
  8. S

    generating voltage source of 100microvolts to 1mV

    Hello, I want to design a voltage source of with voltage ranges from 100 microVolts to 1 mV. I want it for biomedical instrumentation(EEG/ECG). I was thinking of voltage divider but that would not work because of resistance and supply noises. Please suggest me some better way.
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