Timers and Counters in PLCs

You have explored the architecture of Allen Bradley PLCs and the core instructions that these PLCs have including the basic relay instructions, latch and unlatch instructions, one shots, timers, and counters. In this discussion, you will focus on timers how Allen Bradley PLCs and Siemens PLCs use timer instructions and the ample differences in these … Read more

Superposition and Types of Sources

  What is meant by Linearity when applying the superposition theorem? What is meant by a bilateral network? In your opinion, would solving the below circuit for V0 be easier using source transformation or Superposition? Provide both solutions and explain your approach.

nursing

 According to your worldview, what value does a human person have? How does your position affect your stance on controversial bioethical issues, such as abortion, designer babies, and stem cell research? 

Discussion Reply: Thyristors

  Thyristors are semiconductors that are, essentially control systems  for switching and controlling power. The ones used most are  Silicon-Controlled Rectifiers (SCRs), Diode AC Switches (Diacs), Triode  AC Switches (Triacs), and Uni-Junction Transistors (UJTs). Here’s a  breakdown of each one and how they function: Silicon-Controlled Rectifiers (SCRs): Three-terminal semiconductors  used for controlling the flow of … Read more

Discussion Reply: how are sequential circuits different from combinational circuits?

  Discuss the difference between latches and flip-flops. Latches and flip-flops are both bistable devices used for temporary  data storage.  Both devices can have active low or active high inputs.  A  latch determines its output from its input signals only, while a  flip-flop is triggered by a timing or enable input.  The timing input on … Read more

Discussion: Entertainment Center Re-Design

  Imagine that you are designing an entertainment center for 2030.  Consider other technology that may enhance your entertainment center,  such as multiple USB ports and/or power access, perhaps a  voice-activated Alexa, or built-in power protectors. What smart  technology would you add to your entertainment center that is not  currently available? In your original post, … Read more

Discussion Reply: NOR gate a universal gate

  The NOR gate is a universal gate. A universal gate is a logic gate  which can implement any Boolean function without the need to use another  type of logic gate. So this means that you can create any logical  Boolean expression using only NOR gates. NOR gates are sometimes used in  combination to perform … Read more