Making the PCB Design using Altium Designer 6.
PCB Design:
1. Sensor
This PCB is where all the sensors are located
2. Indicators
This is where the LEDs, Fan connectors, and buzzers are located.
3. Switches
This is where the pushbuttons and DIP switches are located
4.LCD
This is where the LCD is located.
PCB Design is made modular to ease placement and hardwares prelocating.
Thursday, October 16, 2008
Tuesday, October 14, 2008
Tuesday, 14th October
-Found out how to drive the fan.
Fan requires 210mA of current while port outputs can only provide 25mA current max. So we need transistor to amplify the current.
Choosen transistor is BC337 which is NPN transistor, Emitter-Base Voltage is 5V, and current output form collector is 800mA.
-Starting to make the PCB Design.
Fan requires 210mA of current while port outputs can only provide 25mA current max. So we need transistor to amplify the current.
Choosen transistor is BC337 which is NPN transistor, Emitter-Base Voltage is 5V, and current output form collector is 800mA.
-Starting to make the PCB Design.
Monday, 13th October
-Debugging and fixing temperature sensor
-Integrating the whole system
-Finished integrating but not yet finalising
-Buying parts from Farnell: LM35DZ temperature sensor and 4 7-segment LEDs PCB mount
-Integrating the whole system
-Finished integrating but not yet finalising
-Buying parts from Farnell: LM35DZ temperature sensor and 4 7-segment LEDs PCB mount
Sunday 12th October
Integrating everything:
Temperature Sensor
Light Sensor
LCD
-Found out that temperature sensor sometimes work and sometimes not.
Temperature Sensor
Light Sensor
LCD
-Found out that temperature sensor sometimes work and sometimes not.
Sunday, October 12, 2008
Saturday 11th October
No Progress.
Progress finished:
Light touch sensor
If there's a change in voltage in LDR, lighting will go from one state to another
Temperature sensor
Normal (green), warm (red static), hot zone (red flicker) finished. Left with cold and freezing zone. Additional: display temperature in LCD.
Fan control
Using 3rd party fan. Will be turned on when temperature is at hot or extreme zone. Fan speed adjustment may use potentiometer or temperature sensor.
Progress unfinished:
RF device
haven't implemented
7-segment
might be used as clock or counter for baby regular medication/feeding/care time.
LCD
used as information display device.
PCB Design:
havent implement
Progress finished:
Light touch sensor
If there's a change in voltage in LDR, lighting will go from one state to another
Temperature sensor
Normal (green), warm (red static), hot zone (red flicker) finished. Left with cold and freezing zone. Additional: display temperature in LCD.
Fan control
Using 3rd party fan. Will be turned on when temperature is at hot or extreme zone. Fan speed adjustment may use potentiometer or temperature sensor.
Progress unfinished:
RF device
haven't implemented
7-segment
might be used as clock or counter for baby regular medication/feeding/care time.
LCD
used as information display device.
PCB Design:
havent implement
Thursday, October 9, 2008
Friday, 10th October
16th October: PCB Design Submission
23th October: CA2 Assessment
Manage to implement the LCD:
LCD will be used to display any information about the babies.
Will going to implement it with LDR and Thermistor sensor.
RF and Fan control might not have enough time to implement.
23th October: CA2 Assessment
Manage to implement the LCD:
LCD will be used to display any information about the babies.
Will going to implement it with LDR and Thermistor sensor.
RF and Fan control might not have enough time to implement.
Wednesday, October 8, 2008
Thursday, 9th October
Manage to make the LDR works!
Material:
Advance Fam Lab Circuit
LDR
Multimeter
Workflow:
LDR is used to measure light intensity. If the intensity is too low, LED will light up. In the system, LED will light up if the voltage output from LDR is below 2.3V (Vd=5V, Vgnd=0V, Vinput = 9V). 2.3V is 470d or 1D6h.
Improvement:
-Further possible improvement is to light up different amount of LEDs in different situation.
Ex:
Bright environment = no LED
Dimmed environment (night time? below 2.2-2.3V and higher than 1.5-1.7V?) = 1 or 2 LED
Dark environment (below 1.5-1.7V?) = 4 LEDs?
-Some strings and texts in the LCD to show that the env. is bright or dim or dark.
Next implementation:
LCD and keypad?
wireless RF to transfer data?
LED 7-segment?
-->used to show temperature beside showing it in LCD
-->reminder, quick alerting device?
controlling fan?
Material:
Advance Fam Lab Circuit
LDR
Multimeter
Workflow:
LDR is used to measure light intensity. If the intensity is too low, LED will light up. In the system, LED will light up if the voltage output from LDR is below 2.3V (Vd=5V, Vgnd=0V, Vinput = 9V). 2.3V is 470d or 1D6h.
Improvement:
-Further possible improvement is to light up different amount of LEDs in different situation.
Ex:
Bright environment = no LED
Dimmed environment (night time? below 2.2-2.3V and higher than 1.5-1.7V?) = 1 or 2 LED
Dark environment (below 1.5-1.7V?) = 4 LEDs?
-Some strings and texts in the LCD to show that the env. is bright or dim or dark.
Next implementation:
LCD and keypad?
wireless RF to transfer data?
LED 7-segment?
-->used to show temperature beside showing it in LCD
-->reminder, quick alerting device?
controlling fan?
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