Week #5: Make-through

• Step1: I sat the DRC from the beginning so I didn't face any problems.

• Step2: Preparing pdf & png files was straightforward no drama.

• Step3: Thanks to Amny for helping and supporting during using Fab modules and the machine.

• Step1: I went over the videos many times. I understood the concept and logic behind the components but I still couldn't understand the coding parts.

• Step2: Ahmed Ibrahim helped with explaining the datasheet for the MUX.

• Step3: I did a small testing code for this board by selecting (I3) from the mux which is the dip switch (4), then I took the Mux output to power up a small led.

• Step4: I programed the ATTINY44 board to do the above logic.

• Step5: I had a very stupid issue and I asked the group. Apparently, I didn't store the value of the mux out and went straight to put it into comparison and of course Ahmed Ibrahim to the help with some sarcasm hehehe.

• Step1: I went over the videos many times. I understood the concept and logic behind the components but I still couldn't understand the coding parts.

• Step2: I watched this video and it helped a lot with using the Shift register.

• Step3: I did a small testing code for this board by lighting up each color on the RGB by input and output a shift number at a time for the shift register. For example, input (2) to light up Red, input (5) to light up Green, ...

• Step4: I programed the ATTINY44 board to do the above logic.

• Step5: I didn't face issues with this one.

• Step1: Used boards I/O boards, ATTINY44 & USBasp to upload the code to ATTINY44.

• Step2: wiring input board to ATTINY44

S0 (pin 11) to pin 0

S1 (pin 10) to pin 1

S2 (pin 9) to pin 2

Mux out (pin 5) to pin 3

Vcc (pin 16) to 5V

GND (pin 8) to ground

• Step3: wiring output board to ATTINY44

Serial Data (pin 14) to pin 6

Shift Clock (pin 12) to pin 7

Latch Clock (pin 11) to pin 8

Vcc (pin 16) to 5V

GND (pin 8) to ground

• Step4: For the input board I divided the code into 4 functions each one named with (Mux input number)_(Dip switch number).

• Step5: I followed the truth table in this datasheet to select my dip switch. So each function digital writes the mux selector pins to select the input from the 4 switches in the dip switch and saves into a variable the mux output through a digital read.

• Step6: I condition the mux out to true or false and depending on that, I know the state of the dip switch H or L.

• Step 7: Function 1-I0_DIP1(). If the dip switch is H (mux out is H) then I shift count 2 to the shift register which turns into binary and lights up the Red color on the output board and of course pulse H the latch pin. If the dip switch is L (mux out is L) then I shift count 0 to the shift register which turns into binary and turns off the Red color in the RGB.

• Step8: Function 2-I1_DIP2(). If the dip switch is H (mux out is H) then I shift count 8 to the shift register which turns into binary and lights up the Green color on the output board and of course pulse H the latch pin. If the dip switch is L (mux out is L) then I shift count 0 to the shift register which turns into binary and turns off the Green color in the RGB.

• Step9: Function 3-I2_DIP3(). If the dip switch is H (mux out is H) then I shift count 4 to the shift register which turns into binary and lights up the Blue color on the output board and of course pulse H the latch pin. If the dip switch is L (mux out is L) then I shift count 0 to the shift register which turns into binary and turns off the Blue color in the RGB.

• Step10: Function 4-I3_DIP4(). If the dip switch is H (mux out is H) then I shift count 255 to the shift register which turns into binary and lights up the White color on the output board and of course pulse H the latch pin. If the dip switch is L (mux out is L) then I shift count 0 to the shift register which turns into binary and turns off the White color in the RGB.

4 Dip switches & 4 colors from RGB led

• Step1: Used boards I/O boards, ATTINY44 & USBasp to upload the code to ATTINY44.

• Step2: wiring input board to ATTINY44

S0 (pin 11) to pin 0

S1 (pin 10) to pin 1

S2 (pin 9) to pin 2

Mux out (pin 5) to pin 3

Vcc (pin 16) to 5V

GND (pin 8) to ground

• Step3: wiring output board to ATTINY44

Serial Data (pin 14) to pin 6

Shift Clock (pin 12) to pin 7

Latch Clock (pin 11) to pin 8

LED_Vcc to pin 5

Vcc (pin 16) to 5V

GND (pin 8) to ground

• Step4: I change the reference voltage and the LED works fine.

• Step5: After some playing around with the code testing to power it up with the dip switches the LED worked fine, which means the wiring is correct.

• Step6: I had to ask on the group and of course I had a problem with the code that I should read digital data from the mux out and op_amp out.

• Step7: I edited the code and I still didn't make it work using the thermistor.