Pcomp - week 1
Lab: Setting Up A Breadboard - TAKEAWAYS
After soldering the DC power jack with the pin, I realized that the voltage for most DC power adapters I found was too high for the voltage regulator. The voltage regulator will get overheat once I plug in the power.
I tried using the battery and it works! The battery is really easy to have a connection issue since it does not hook to a pin. So I switched to the Arduino nano board with 3.3V instead.
Lab: Electronics - TAKEAWAYS & PROBLEMS
When measuring resistance, MUST REMOVE FROM CIRCUIT (or the reading will be nothing)
When putting 2 light bulbs in series (3.3V from Arduino nano, 220 Ω resistance)
Use 2 red lightbulbs - can light up but very dim (1.6V)
change resistance from 220Ω/ 110Ω/ 10Ω/ wire - not much visible change, still very dim (very subtle!)
Use 2 green/blue/yellow - not light up at all
Use 1 red + 1 green/blue/yellow - only red bulb have a very very dim light (very subtle!), the other does not light up
When putting 2 light bulbs in series (5V from Arduino nano, 220 Ω/ 680 Ω resistance) - not light up (any color light bulbs)
When putting 3 red light bulbs in parallel (3.3V from Arduino nano, 220 Ω resistance) - light up brightly (1.8V)
the electric current that goes through one red light bulb is 0.08-0.09mA
if change one bulb to yellow/ green, the electric current that goes through one yellow/green light bulb is 0.07-0.08mA
When measuring the amperage of one LED of three LEDs wired in parallel, the result comes 0.11mA - two light is bright, one is really dim but still light up (very subtle!)
Lab: Switches and Pushbuttons - TAKEAWAYS & PROBLEMS
Project 1: Three switches parallel
work when press one/more switch
Project 2: Three switches in series
work when pressing three buttons together
Project 3: Switch a Motor
Part 1: switch + motor in series - Work!
Part 2: switch control motor and light (motor and light parallel)
connection issue caused several failures, fixed!
