Hi guys.
I have a problem with an IR sensing photo-diode. I have to amplify the signal using a schmitt trigger. I think the output from the photo-diode will not be a strong one, around 0.02V (I have yet to measure it, in the meantime I just want to know how the Schmitt trigger works)
On this site I've found a calculator to help me with the resistance:
http://www.random-science-tools.com/electronics/schmitt-trigger-calculator.htm
Input:
Low Threshold: 0V
High Thershold: 0.02
Output Votlage, Low: 0V
Output Voltage, High: 3V (My microcontroller will interpert this as 1)
But my question is, what happens to Vcc in these calculations? Does it matter what Vcc I use or does it only depend on the Op Amp I'll use?
Thanks in advance
I have a problem with an IR sensing photo-diode. I have to amplify the signal using a schmitt trigger. I think the output from the photo-diode will not be a strong one, around 0.02V (I have yet to measure it, in the meantime I just want to know how the Schmitt trigger works)
On this site I've found a calculator to help me with the resistance:
http://www.random-science-tools.com/electronics/schmitt-trigger-calculator.htm
Input:
Low Threshold: 0V
High Thershold: 0.02
Output Votlage, Low: 0V
Output Voltage, High: 3V (My microcontroller will interpert this as 1)
But my question is, what happens to Vcc in these calculations? Does it matter what Vcc I use or does it only depend on the Op Amp I'll use?
Thanks in advance