Question

Problem 3. Determine Viets, the voltage at the (-) inverting input of the 3160 comparator, for each case given belovw a. The slider of the 50kr trim pot is 25% of the way from its 0V lead to its 5V lead. b. The slider of the 50kr2 trim pot is 50% of the way from its 0V lead to its 5V lead. C. The slider of the 50kr2 trim pot is 75% of the way from its OV lead to its 5V lead. Problem 4. You want the output of the 3160 comparator to look like a TTL clock signal. Determine for each case whether the slider of the 50ks2 trim pot should be dialed towards its OV lead or its 5V lead a. The 3160 output is a steady 5V. b. The 3160 output is a steady OV Problem 5. Say you've tuned up the 3160 comparator circuit to get a Vout that looks like a TTL clock signal on the oscilloscope. You see that the time it takes to go from one positive edge to the next positive edge is 24ms. Determine the motor RPM

please answer all the questions (3 to 5)

Answer 1

3160 comparator. (a) potentiometer concepts /Trim-point therefore V_ref = (5 - 0) times 0.25 = 1.25 v V_ref = 50% of 5v = 2.5 v. c) for 75% V_ref = 3/4 times 5v = 3.75 v. to get a TTL clock signal Switching from High to low to be done. So when (a) 3160 output rightarrow 5v trim - part towards rightarrow 0 v (b) when output rightarrow 0 v implies Trim-pot towards rightarrow 5 v (c) Given Time period of TTL clk signal implies 24 ms = 0.024 s. one Time period rightarrow 1 rotation 24 ms = 24/60 times 10^-3 minutes = 4 times 10^-3 minutes. Therefore RPM implies 1/tau = 1/4 times 10^-3 RPM = 250 RPM