BOARD DESIGN

PIR sensor and bipolar stepper motor

BOARD DESIGN

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I referenced Neil's boards. These are the boards PIR motion sensor and bipolar stepper motor. I tried to combine those two board in one. For my project, stepper motor will do a bigger role so I added sensor part on stepper board. I designed bipolar stepper board and put HC-SR501 the PIR sensor on it. I connected sensor's VCC and GND to board's and connected sensor's out pin to PB0 pin on ATTiny44. and to make board compact, I placed every components and rotated and create routes. This is my board for final project.




And I exported to image file and modified scale and put my name on it.


I created .PNG files for trace cut and outline cut. For milling, I opened these files at fabmodules and created .nc file.

MILLING

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Milling was fine, and i finished with fine sanding paper.

COMPONENTS AND SOLDERING

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These are all the components I used for this project. I wrote down a list and arranged on paper before soldering.

I stared with thin components to thick and center to edge.

After soldering done. I soldered jumper cable for PIR sensor.

Like this.

Then I connected stepper motor to each correct pins and PIR sensor.

June third week 6/10~16
-I designed second board, milled and soldered components.

COMPONENTS AND SOLDERING

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But first board didn't work well. When I connected power, motor rotates well. but with unknown reason sensor doesn't work and motor doesn't rotate.
So I decided to make another board with LED. I added LED and resistor on schematic and connected to PA7.

And I opened board file in Eagle. and routes


I exported to PNG file and modified scale and shapes.


milling was fine.


after some finishing works like before I got this beautiful board.

Here's the components I needed.

After soldering.