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    (title "Oscilloscope PCB")
    (date "2024-02-01")
    (rev "rev1")
    (company "Oregon State University")
    (comment 1 "Author: Shirley Lam")
    (comment 2 "Reviewer 1:")
    (comment 3 "Reviewer 2:")
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  (text "1M ohm resistance min to each BNC connected channel to limit current \nfrom the input source, and to increase voltage range (attenuation).\nStandard oscilloscope probes assume input resistance of at least 1M.\n\nResistor divider created to attenuate the signal by a factor of 2\n(considering that the cap becomes a short at AC, and the Vin is voltage \ndivided) and to add a DC offset of 1.65V (resistor divider to half this value\nfrom the power rail as well) approximately. Simulated in LTSPICE.\n\n200 ohm resistor added to each pin connecting to the rotary encoder\nconnector to reduce input current into digital pins 3,4 on uC\n\n1 4.7K resistor (standard pull down resistor value) from output signal \nconnector socket for push button to digital pin 9 on uC"
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  (text "Pin Calculation:\nVmax = 3.3V\nVmin = 0V\nImax = 250 mA\nVmax/Imax = 13.2 ohms\nRmin = 13.2 ohms\nResistances wired in series to pins must be at least \n13.2 ohms to reduce input current"
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  (text "uC: Teensy 4.0\nPinout:\nPins 3 and 4 are digital pins to rotary encoder\nPins 21 and 22 are AnalogRead to BNC"
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