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?