Introduction
Most of the reversing circuits you've built in Module 5 have had one thing in common: they used a forward button to energize the forward coil, and a reverse button to energize the reverse coil.
Now, you will design a circuit that uses one start button, one stop button, and one selector (maintained) switch to run a motor in forward or reverse.
The following must be followed and/or included in your circuit:
- The user uses a selector (maintained) switch to choose "forward" or "reverse".
- After the desired direction has been selected, the user presses the "Start" button and the correct coil energizes.
- To change direction, the user presses the "Stop" button, uses the selector switch to choose the other direction, and then presses "Start".
- The selected coil must stay energized until the user presses the "Stop" button. (In other words, use holding contacts. Think "typical motor circuit" as a starting point.)
- Include lights: one color light to indicate that the forward coil is energized and a different color light to indicate that the reverse coil is energized.
- Include circuit protection that will prevent the delivery of current to the forward coil and the reverse coil at the same time.
Lab Instructions
- Unplug the Motor Controls trainer.
- Draw a schematic diagram, in Automation Studio or by hand, that represents a circuit that will operate as described above. Make sure your circuit works in simulation before moving on to the next step.
- Build the circuit on the Motor Controls trainer.
- Plug in and turn on the Motor Controls trainer.
- Test the circuit.
- Design, build, and demonstrate a circuit that uses one "Start" button, one "Stop" button, and one selector (maintained) switch to run a motor in forward or reverse.
Submission
To complete this lab, submit a 30-second video following the criteria found in the rubric. If you are working with another student, each of you must record and submit your own video.

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