Skip to main content

What goes in, must come out

There's no need to waste time trying to understand how any circuit works before you get this: The current flowing into your circuit is always the same  ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ ā€Œ

This email contains a crucial piece of information.

There's no need to waste time trying to understand how any circuit works before you get this:
ā€‹

"The current flowing into your circuit is always the same (in size) as the current flowing out of it."

ā€‹
Do you have 1 Ampere flowing out of the battery?

Then 1 Ampere flows right back into it!

ā€‹
The typical question when confronted with this claim for the first time is:

"What if we connect the battery to a motor - won't the motor use some of the current??"

The answer is no.

The motor does not "use up current".

If you are struggling to come to terms with this, let me give you a comparison:

ā€‹

Imagine a fountain.

At the base, you have a pool of water, with a statue in the middle.

Inside the pool, there's a pump.

It pumps water from the pool through the statue.

And the statue, for lack of a better word, "spits" the water up into the air.

Then the water falls back down into the pool.

ā€‹

The pump can be compared to the battery in a circuit.

The water can be compared to the current.

The amount of water going into the pump is the same amount that the pump pushes out.

ā€‹

Energy is needed to "spit" the water out of the statue.

But the water is never "used up".

A circuit isn't the same as a fountain though.

But I'm giving you the comparison so that you can say to yourself:

"Yes, I can see that it makes sense that the current that goes out of the battery must go back into the battery."

ā€‹
If you can, then I've achieved my goal with this email. Remember:

What flows into the circuit, must flow out of it.

ā€‹
These are the kinds of lessons I try to stress when people are starting their electronics journey over at Ohmify.

And it's the foundation you need to have to be able to make your own electronic gadgets from scratch.

ā€‹Find out more about learning electronics with Ohmify here >>ā€‹

ā€‹
Keep On Soldering!
Oyvind @ build-electronic-circuits.com

Comments

Popular posts from this blog

Weekend DIY electronics projects! Talking colorimeter, gamma ray measurement, and more

If you can't see this message properly, view it in your browser. May 3, 2024 | #589    Measure Gamma Rays with a Photodiode: Radiation Detector Using a BPW34 The first device that springs to mind when thinking about measuring radioactivity is the Geiger-MĆ¼ller tube. However, these counter tubes can be difficult to find and expensive; and, even if you do manage to get hold of one, you will still need to find a way to generate its operating voltage of several hundred volts. It is less well known that even a humble photodiode such as the BPW34 can be used to detect X-rays and gamma radiation.   more...     The Andonstar AD210, an Affordable Digital Microscope with a 10.1" Display The Andonstar AD210 is an entry-level model digital microscope with a large 10.1...

Without this, you won't learn electronics

One thing I'd like to learn (or to become better at) is: The practice of silencing my thoughts for a short period. Also called meditation. What does that have to do with electronics? It reduces stress and makes me more focused on the task at hand. So I can build more circuits, faster . At least in theory. ā€‹ The problem is that I don't practice it. So naturally, I don't get the benefit of it. I recently asked my former meditation teacher for advice. He asked me back: "What's holding you back?" "I don't have enough time," I started typing (this was on Facebook Messenger). Then I deleted it because I realized that I could do it in as little as 5 minutes per day. I tried again: "I don't know what to do." But I had to delete this too because I had all the notes from the class that showed me exactly what to do. Then I tried: "I guess I don't have the motivation?" But again, I realized t...

The Arduino bonus offer expires in a few hours

In a few hours, Ohmify's Birthday deal goes away for good. This deal won't be available again soon, so time is ticking away on your opportunity to lock in a huge discount and jump-start your electronics learning journey. ā€‹ ā€‹ Here's a recap of the benefits you can expect from an Ohmify membership: An original Arduino UNO and our Beginner's Component Kit with more than 50 components in total (Value: $65) ā€‹ 24/7 access to more than 700 electronics lessons (and counting!) to learn electronics - even if you have no previous experience. ā€‹ A friendly community forum where you can ask questions, get help with projects, share your progress, or just chat with like-minded people. We take care of our members: Beginners are welcome, and no question is too basic! ā€‹ Learning Tracks that tell you where to start and where to go next to learn specific skills such as basic electronics, soldering, Arduino, PCB Design, and more. We'll guide you along the way, so y...