Category: Fab Academy Providence -Year II – Teaching

This board is a “hello world” for running a basic stepper motor board..   To make it yourself – download the Fab Academy board diagrams / .pngs and code.

To Program the Board / Motor to Do a Half Turn

sudo make -f hello.stepper.44.half.make program-usbtiny

To Program the Board / Motor to Do a Full Turn

sudo make -f hello.stepper.44.full.make program-usbtiny

To Program the Board / Motor to Do a Wave

sudo make -f hello.stepper.44.wave.make program-usbtiny

I had trouble getting this board to work at first, the motor would turn back and forth only a small amount, not the full or half turn that the program specified. Then I checked the jumper wires. One of the wires was bad (the header was not connected). After replacing the faulty wire, the motor ran.

This board is a “hello world” for a basic  RGB LED. The program flashed to the microcontroller cycles through the available LED colors.   To make it yourself – download the Fab Academy board diagrams / pngs and code.

This board is a “hello world” for a basic LED matrix. I labeled some green LEDs as red by accident, so there are green and red LEDs on the board. (I had intended them to be all red).  Download the Fab Academy board diagrams / pngs and code.

Board In Action

Programming Setup

To Flash the Board

sudo make -f hello.array.84.make program-usbtiny

Terminal Output Upon Success

avr-gcc -mmcu=attiny84 -Wall -Os -DF_CPU=8000000 -I./
-o hello.array.84.out hello.array.84.c
avr-objcopy -j .text -O ihex hello.array.84.out hello.array.84.c.hex;\
   avr-size --mcu=attiny84 --format=avr hello.array.84.out
AVR Memory Usage
----------------
Device: attiny84

Program:     358 bytes (4.4% Full)
(.text + .data + .bootloader)

Data:          1 bytes (0.2% Full)
(.data + .bss + .noinit)

avrdude -p t84 -P usb -c usbtiny -U flash:w:hello.array.84.c.hex

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e930c
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be
performed
         To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "hello.array.84.c.hex"
avrdude: input file hello.array.84.c.hex auto detected as Intel Hex
avrdude: writing flash (358 bytes):

Writing | ################################################## | 100% 1.03s

avrdude: 358 bytes of flash written
avrdude: verifying flash memory against hello.array.84.c.hex:
avrdude: load data flash data from input file hello.array.84.c.hex:
avrdude: input file hello.array.84.c.hex auto detected as Intel Hex
avrdude: input file hello.array.84.c.hex contains 358 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.60s

avrdude: verifying ...
avrdude: 358 bytes of flash verified

avrdude: safemode: Fuses OK

avrdude done.  Thank you.

The purpose of this board is to take input from a phototransistor and display it visually using a python program when the board is connected to a computer via a FTDI cable. Link to the Fab Academy board diagrams / pngs and code.

To Flash the Board

sudo make -f hello.light.45.make program-usbtiny

Terminal Output When Board is Being Flashed

[sudo] password for akaziuna: 
avr-gcc -mmcu=attiny45 -Wall -Os -DF_CPU=8000000 -I./ 
-o hello.light.45.out hello.light.45.c
avr-objcopy -j .text -O ihex hello.light.45.out hello.light.45.c.hex;\
avr-size --mcu=attiny45 --format=avr hello.light.45.out
AVR Memory Usage
----------------
Device: attiny45

Program:     426 bytes (10.4% Full)
(.text + .data + .bootloader)

Data:          0 bytes (0.0% Full)
(.data + .bss + .noinit)


avrdude -p t45 -P usb -c usbtiny -U flash:w:hello.light.45.c.hex

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e9206
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
         To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "hello.light.45.c.hex"
avrdude: input file hello.light.45.c.hex auto detected as Intel Hex
avrdude: writing flash (426 bytes):

Writing | ################################################## | 100% 1.27s



avrdude: 426 bytes of flash written
avrdude: verifying flash memory against hello.light.45.c.hex:
avrdude: load data flash data from input file hello.light.45.c.hex:
avrdude: input file hello.light.45.c.hex auto detected as Intel Hex
avrdude: input file hello.light.45.c.hex contains 426 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.77s



avrdude: verifying ...
avrdude: 426 bytes of flash verified

avrdude: safemode: Fuses OK

avrdude done.  Thank you.

Run The Visualization Program

python hello.light.45.py /dev/ttyUSB0