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Final Design
Final Protoboard Design
Here you can see the final design for the overcurrent circuit. If you are thinking that it looks a bit different, you would be right. lets go over the changes that were made and why they were made.
Firstly, the 5 volt regulator was taken off. Having a rechargeable 9.6[V] battery at our disposal, it was decided that the circuit was to be run off that. The same battery that ran this circuit, also ran the mini project my group was working on. Connecting the battery to everything allowed for a better common ground connection.
Second, the use of a second comparator in this quad chip was used (inputs and outputs 1 and 3). Because there was 2 motors to protect and each had the chance to run into overcurrent, it was best to use more than 1. 2 motors, 2 comparators, 2 outputs, and better results.
The same voltage divider was used for the 3rd inputs so it was a copy and paste to the other side.
Oscilloscope Readings
This reading was taken to prove that the circuit was in fact operational with the required inputs and outputs.
Using a waveform generator to produce a +1.1[V] to -1.1[V] amplitude AC voltage (green reading) as the Vin, this allowed to test the output with a changing input voltage.
Once the Vin was set, a constant 3.3[V] Vref was taken from the Basys3 board, as the voltage being compared. This is still hooked up to the voltage divider from before to get the 1[V], having the 1 to 1 relation with current, being compared.
Based on the reading we can see that as the Vin value is to rise above the 0.97[V] being compared, the real output (yellow reading) rises to give a logic level high. When the Vin is below the reference, it is a logic low. Just what was wanted.
Full Assembly
These next pictures show the process of putting every thin together. The Basys3, H-bridge, overcurrent, and rover chassis. This was the main project, and to make sure it works of course. The labels show how each component connects to one another. The video below shows a ran test of everything working as one system.
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