Week 9_4/10/19






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Week 3_ 2/20/19

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Dr. Furman told us that we are allowed a small space during Maker Faire and would have to shorten the length of the track. A couple of our team members when to the courtyard at SJSU where the half-scale track was being held and found that there is a part that can be easily sectioned off. We will keep 18ft of the track including the slope and y-junction. The legs will also be cut to around 4ft so that the bogie will just hover over the floor. This week, I found a pair of Xbee modules in a box while looking through an unclaimed cabinet brought from the old warehouse. With the 2 S1 edition modules was also an Xbee shield which will be used to fit onto the Arduino.   Looking through the Sparkfun website where the Xbees are sold, shows that the module takes in 3.3V and 50mA. The range of the Xbee is 300ft which will be able to accomplish our goals.  Figure 1. Xbee module                       Figure 2. ...
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Week 2_ 2/13/19

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Special guest, Jean, a previous engineer from Bart discussed the possibilities and benefits of having an accelerated transit network. He has recently been developing a code that would manage the individual pods from the pickup area to a destination and provided us with a possible layout of the track that would be most effective. He has proposed to help the small scale team with their project. For the start of this semester, we have decided to designate roles to each person as shown in the image below. Figure 1. List of tasks This semester, we are focused on the automated portion of the bogie. I have decided to take on the wireless communication aspect of the bogie as well as complete the team poster requested by Ron. I began looking into the Xbee module again and found that it required the X-CTU software for control of the module. Different type of Xbees are being researched for possible purchase. Basic parameters on the X-CTU software needed in order for the Xbees' to c...
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Week 7_ 3/20/19

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I purchased the 10 NRFL01 wireless modules on Amazon for $11. We will be using 1 of them for the master bogie. I researched how to set up the modules while they are being shipped and have found example codes for the receiver and transmitter code shown in Figure 1 below and have tried to see if it will work. It seems that the code is sending the "Hello World" text but with noise/ junk between each sent message on the Serial Monitor.                         Figure 1.a. Receiver module code on Arduino                       Figure 1.b Transmitter code on Arduino The wiring should be as in Figure 2 below with the supply voltage being 3.3V instead of 5V. Figure 2. Arduino to NRF24L01 wiring This information was found on:  https://howtomechatronics.com/tutorials/arduino/arduino-wireless-communication-nrf24l01-tutorial/
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