Recent content by JOEandSTEPH

  1. J

    Maximum value of E = a.sin(x) + b.cos(x)

    That gives us t = 2.284 milliseconds So E = 15.sin(50.pi.[2.284[SIZE="1"]x10-3]) + 40.cos(50.pi.[2.284[SIZE="1"]x10-3]) So E = 42.72
  2. J

    Maximum value of E = a.sin(x) + b.cos(x)

    Okay I think I get what you're saying. So, 750.pi.cos(50.pi.t) - 2000.pi.sin(50.pi.t) = 0 750.pi.cos(50.pi.t) = 2000.pi.sin(50.pi.t) 750.pi = 2000.pi [sin(50.pi.t)] / cos(50.pi.t)] 750.pi = 2000.pi.tan(50.pi.t) 750.pi / 2000.pi = tan(50.pi.t) tan-1[750.pi / 2000.pi] = 50.pi.t t =...
  3. J

    Maximum value of E = a.sin(x) + b.cos(x)

    We've been given the following equation, E = 15.sin(50.pi.t) + 40.cos(50.pi.t) We've been asked to find a value of E we think at its maximum value (can't quite remember the question at the moment). We know that the second derivative will give us whether the equation gives the maximum or...
  4. J

    Frequency question - 555 timer driving a transducer

    1. For a school project we're building an emergency braking system. In addition, we also want to trigger an audio-visual alarm system to alert a third party to the operation of the system. For the alarm system we are using a 555 timer to generate a squarewave output to alternate a buzzer between...
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