Input Devices

learn about Sensors to understand them

I thought the sensor needed for my final project was an acceleration sensor.

To identify the sensor, I have used the Aduino acceleration sensor GY-61.

Follow the tutorial to use the GY-61. Tutorials can be found here

I could see that X, Y, and Z values changed according to the sensor's movement!

And I read the data sheet because I needed to understand the sensor to use the acceleration sensor.

ADXL343 data sheet here

ATtiny85 data sheet here

ZLDO1117 data sheet here

I read the datasheet, but I couldn't understand much.

The ADXL sensor communicates with the microcontroller using I2C and supply voltage range is 2.0 v to can see that 3.6 v

I can see that I have to change the voltage using the regulator Because I use a voltage of 5V

After checking the data sheet, I used Kicad to create a board design sketching.

After sketching, I'm put footprint on my Board Then I connected the NEW PCB board.

The connection was not easy, so it took 3 days and finally decided to use the jumper....

I printed out the board design to see if it fits the size of the board and part.

The switch didn't fit, so I changed footprint of switch

The distance between the ADXL sensors was very narrow and the 0.4mm end mill was not available.

I divided the layers of the board design because I wanted to cut the part of the ADXL sensor into 0.1mm end mill.

And I tried to milling using Fab mods

I tried to finish all the setup and start milling, but it didn't work.

I had to find a new way and decided to save the setup as a G-code file and operate the machine.

I tried to mill the 0.1mm end mill part first.

I thought it was neat, so I milling the rest and making the "first" board.

The sensor seemed to have been soldered well, but I burning to attiny85 while soldering

I tried to save the board, but things got worse.

So I failed the first board and made the second board.

The second board was good for sensors and everything was good.

I couldn't take a picture of the completed board, but I tried programming..

I downloaded the ADXL343 library from the Arduino Library Manager and ran the example.

I installed the driver with Zadig to use AVRISP in Windows 7.

The programming was not uploaded to the board and the problem was that a voltage of 3.3V should be inserted, but a voltage of more than 4V could be identified.

The problem was caused by the use of a 0.1A regulator, which should have used more than 0.3A regulator.

Remove regulator and re-program the board with a voltage of 3.3 V using YwRobot Bradboard Power Supply.

Programming was uploaded intermittently due to poor connection between 6pin header and Attiny85.

My greed is endless, and I repeat the same mistakes.

I wanted a clean connection, so I had to do soldering again, and then I burned the board Disaster.....

I decided to make a third board to solve the regulator problem.

The sot223 regulator was 1A regulator, which was larger than the 0.3A I needed, so I was able to solve the problem.

Smoke came out of the regulator when I made a board and connected it to a laptop.

I checked with a multimeter and GND and VCC were connected.

I soldered it again and connected it to my laptop, but the regulator burned again.

I looked up the pinout of the sot223 because I don't think it's a connection problem.

The footprint I used was different from the pinout of the actual sot233.

OMG... I was connecting GND and VIN in reverse

I cut the board connection with a piece knife and used a wire to solve the problem.

However, I tried to connect the board from my laptop to see if the sensor had a bad connection, but I couldn't find the board.

I made the fourth board but In the process of connecting the sensor, the vcc and gnd were connected.

I used all the available sensors and I was Despair

Help me...

my work

my board 0.1mm pnghere

my board 0.4mm pnghere