Week 1 Day 2 (Jan 17) Lab Video Notes

BASICS OF ELECTRICITY

AC vs DC

AC

• wall socket
• volitile
• 110 V to 120 V AC
• 60hz in US

DC

• batteries
• constant
• positive/negative

Alternating current:~~~~

Direct current: ——

WHAT WE MEASURE

• volts (v) (E)
• current (A) (I)
• resistence (Ohms)
• Ohms (V= IR) (volts= current x resistence)
• Find whatts: P/I(E)

HOW A BREADBOARD WORKS

-Make wire stable using wire cutters and bending

-Virticle lanes connected to eachother ut does not travel horizontal across lanes

-Outside blue (+) and red (-) lines run horizonal

FLASHLIGHT CIRCUIT

-put in LED

-trim down resister and wire to cut out future problems

-black to blue (ground)

-red to red (power)

-battery to board

-register legs, through register to ground, other to power

SCHEMATICS AND DIAGRAMS

COMPONENTS IN THE FLASHLIGHT CIRCUIT

LED Structure

-Positive Parts

• large wire inside light
• flattened part on ridge
• long leg

%5 Gold Resister

Colored lines (ex: 10,000 whatts)

• First #: 1 - brown
• Second #: 0 - black
• Number of 0’s left: 3 - orange

Value - Color 0 - black 1 - brown 2 - red 3 - orange 4 - yellow 5 - green 6 - blue 7 - violet 8 - grey 9 - white

LAB 1: the flashlight

-volts are PUSHED -currents PULLS/DRAWS

LAB 2: voltage dividers

Voltage divider

• COM (black)
• VmA (red)
• put it on next highest number for precision
• 2 ends of registers touching
• 10k patentiager
• ADJUST VOLT OUTPUT