Let’s play with electricity

electricity

This week doesn’t require any mad programming skills and just basic electrical know how.

electricity

With the help of helping hands, this allows me to both hold the points together to get a reading on the multimeter and take a picture at the same time. Of course this one beeps.

So does this one. Notice that I wired the board in such a way that both sides have power and ground.

electricity
electricity

Which of the images above has a complete circuit?

But fun question, does electricity pass through our bodies? Yes, but we still provide enough resistance that the 5V from the Arduino will not shock us nor complete the circuit.

electricity

And just like that with a resistor and all, we have another lit LED.

electricity

Interesting that the LED uses approximately 1.72 V out of 5V.

electricity

The amount of electricity passing through the resistor is approximately 3.31 V. Add that up it’s almost 5V. At least we know where all the power is going.

electricity

electricity

Let’s add a switch and see if it affects the power flow.

electricity

Well apparently all it does is just cut off the power completely.

electricity

Notice that the gree light is not as bright as the red one. Different color LEDs have different power requirements.

electricity

electricity

Notice the difference between the power usage of the green and the red LED and the amount that passes through the resistor.

electricity

Now when we add another LED, they don’t light up as brightly as before.

electricity

The resistor is now only getting 0.14 V.

electricity

But if we re-arrange the LED’s that they’re all being powered by a single line instead of a series of leads. It’s a whole lot brighter.

electricity

The resistor is using up 3.38V. while the LED’s are at 1.65 V.

electricity

Advertisements
  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: