Fab Academy 2024

Group 1:

- Hans Moncca

- Maryori Vasquez

- Maria Angela Mejia

- Cristian Loayza

- Silvana Espinoza

MEASURING CONSUMPTION POWER

For group development we decided to measure the outputs of each one with their own boards developed last week. The idea was to learn how to measure AMPS, VOLTS and replicate it on each board. In my case, I used the SERVO MOTOR, OLED SCREEN and NEOPIXEL LED. To carry out the OUTPUTS DEVICE week, I decided to make a new board solving the errors that I had in the last week, I did not focus much on the design but more on the operation to be able to develop the individual and group assignment. Then I modified and redesigned the plate, here is my group order.

SERVO MOTOR - VOLTAGE

To measure the power consumption, I first use the multimeter and also the oscilloscope Here my analysis of the servomotor: First we measure the VOLTAGE that the SERVOMOTOR needs for its operation, to do this we place the COM of the multimeter in the GND of the SERVOMOTOR and the POSITIVE in the 5V of the MOTOR. This will give us a measurement of 4.65 to 4.68 of the voltage that the SERVOMOTOR needs to operate. Here are some images of how we measure it.

In the video we can see the change in voltage that the SERVOMOTOR has when rotating or changing degrees. We must place the COM AND VOLTAGE points correctly to be able to measure accurately.

SERVO MOTOR - AMPS

Now we will measure the amperes or intensity of the SERVOMOTOR. To do this we need to make a SERIAL connection, where we will place the COM and the mA to another point of the 5V, acting as a bridge. Then we will measure in mA and here the result.

Like voltages, the amperage of the servomotor changes according to the movement made by the output and we can see different values that we obtain.

SERVO MOTOR - OSCILLOSCOPE

We also analyzed with the oscilloscope where we obtained a WAVE type diagram when we connected the oscilloscope channel to the GND pin of the board. We could see that it was constant, here are some photographs of the measurement.

By measuring with the oscilloscope we observe the difference that the waves have with other types. In the following video, we can see the behavior of the OSCILLOSCOPE when we contact the GND and see the data it provides us.

OLED DISPLAY - VOLTAGE

With the multimeter you can also measure the voltages of an OLED. To do this we need to place the COM point of the multimeter at the GND and the mA point at the 3.3V point, both of the OLED. Here we can see how when connecting we obtain the voltage that the OLED receives and has for its operation.

OLED DISPLAY - OSCILLOSCOPE

Now we will use the oscilloscope for the OLED. In this case, we did the tests on each pin that the OLED has and it gave us the same wave signal in each of them, it only changed the intensity and we managed to capture some of them. Here are some photographs of how we did it.

Here is a test video of how we use the oscilloscope on the OLED.

NEOPIXEL - VOLTAGE

Now with the multimeter we measured the VOLTAGE generated for the NEOPIXEL where we obtained a value of 3.411 when measuring it. Here we can take some photographs at the time of measurement.

In the following video we can see how the multimeter marks different values that we obtain from the NEOPIXEL voltage.

NEOPIXEL - AMPS

To measure the amperes of the NEOPIXEL, just as with the previous devices, we change the multimeter to AMPERES and see by joining both component poles we can have a value of 6.98 to 7.10 that the multimeter marked for us.

In the video we can see how by connecting the multimeter in series, we can turn on the LED and at the same time obtain the value of AMPERES that we need to know the consumption, where we obtained values less than 7 mA.

NEOPIXEL - OSCILLOSCOPE

With the help of the oscilloscope I was able to analyze the behavior of the waves in the NEOPIXEL. Here are some photographs of them in which we can see that waves continue to be generated when they come into contact with any pin on the board.

Here in the video we can see the change that is generated in the oscilloscope when I place channel A of the equipment in PIN 3 where we have the DATA that the microcontroller is sending to the neopixel.