Location: Logan HS
Time: 2 hours
Goal: Design and test the delay circuit and linear actuator circuits.
Students: Grant and Ben
We need a delay circuit for the grinder operation. We would like about a 2 second delay between when the grinder is turned on to when the operator begins to use it. This is to allow the operator to get both hands safely on the grinder. We are using a 555 timer in the circuit and used the RC time constant formula to help calculate the necessary components.
In the video below you will see when the two wires are connected (simulating a switch on the grinder) a LED will light up appoximately 2-3 seconds after the circuit is closed. This will give us the delay
The control circuit for the linear actuator has been bench tested. What you will see in the video (if you look at the multimeter to the left side of the frame) is the voltage changing as the switch is depressed. This indicates the switch we are using works and the multimeter takes the place of the linear actuator to show a voltage is sent to it. The switch also has a built in LED.
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