This instructable is a step by step guide to design and simulate a simple electronics project on 123D Circuits using a virtual breadboard design which is linked to schematic and layout views.

Step 1: Create an account

Go to 123d.circuits.io and fill in your user name, email and password.
<p>Just a note to let you know I have added this ( a year ago ) to the instructable:</p><p> Comprehensive Guide to Electronic Breadboards: A Meta Instructable</p><p>&gt;&gt; <a href="http://www.instructables.com/id/Comprehensive-Guide-to-Electronic-Breadboards-A-Me/" rel="nofollow"> http://www.instructables.com/id/Comprehensive-Gui...</a></p><p>Take a look at a bunch of ideas for using breadboards.</p>
<p>Thanks for this. I never knew about this site. It will help.</p>
<p>Can you change the resistor's size? For instance, it takes 5 slots, can i change it so it takes 6?</p>
<p>I've just opened an account and was trying to create a simple circuit, but the breadboard won't let me make the final jumper wire connection. I drag it, but the wire just disappears, Can't find anything in the Help. Can I impose on you?</p>
Anyone know if you can force a &quot;top-down&quot; view of the breadboard components so they don't take up so much space? For example, notice how the quasi-3D view of the LED in the image above makes it obscure several adjacent columns...that was my biggest complaint the first time I tried to use <a href="http://fritzing.org/" rel="nofollow">Fritzing</a> (so bad, in fact, that I gave up using it because things like potentiometers and MOSFETs were just enormous), and I'm wondering if this would be a good alternative for realistic breadboard diagrams that might have tightly packed components.
ya, its really annoying but theirs another one i kinda like, i'm wondering if its accurate but it still works for most things. http://www.falstad.com/circuit/
I haven't taken much of a detailed look yet. I'm wondering, since it can simulate Arduino does that mean that it can also simulate the ATMega line of microcontrollers natively? The 328 at least since that's what an Arduino contains? <br> <br>I like the idea of an Arduino but I much prefer to use these units in native mode.
My LED blows up using a 350Ohm resistor!
At what voltage? You have to remember, both resistance and voltage play a factor! At 350-Ohm, You should be no higher than 5V supply.. real-world, I use 220-ohm resistors for 5V output. 12V, nothing lower than 2.2K. <br>
You are right that was a mistake. The voltage over the LED is 1.7V not 2V. I corrected it. Thanks for the heads up!
I am just getting started teaching myself about electronics, so I can fix my CB &amp; Ham radios. This just what I need to help me learn about how and why things work. Thank you
First, thank you. This is great. I can try a whole bunch of things with out explosions in my face. I have never managed to get into electronics before. I have certain things that I <em>think</em> I know about electronics, but I haven't tested this knowledge.<br> <br> I had a problem with this instructable (as noobs will).<br> <br> My LED kept [simulating] explosion. Then I noticed that the resistor color bands change in the images. Now in my limited understanding of electronics I believe that the colors on resistors mean something, so I found [<a href="http://www.digikey.com/us/en/mkt/4-band-resistors.html" rel="nofollow">http://www.digikey.com/us/en/mkt/4-band-resistors.html</a>] which let me enter the colors of each band and it looks like we should use 420 Ohm for our Resistance setting to match the screen. Is that correct? It may be beyond the scope of this instructable to explain how to determine this number, but can you recommend a source that can help guide us in making this?<br> <br> Thanks again, this is a really nice way to learn some about electronics with limited risk.
There are <em>loads</em> of online LED-Resistor calculators - my personal favourites are: http://led.linear1.org/1led.wiz for a single LED, or http://led.linear1.org/led.wiz for arrays of LED's. They are by the same people, so each has a link to the other.<br> <br> Or you could take Evil Mad Scientist's (http://www.evilmadscientist.com/2012/resistors-for-leds/) advice and learn to do the calculations yourself.
Excellent, that's what I was hoping for. Wading through Google search results when you are a noob is overwhelming. Not because there is a lack of information, but because it's hard to keep things in context when you do not yet have any context to keep things in. <br> <br>Your Evil Mad Scientist's link looks like just what I need. Thanks.
You're welcome.
It seems this way to me too. Here's the comment I was going to post before I saw that you already addressed this problem.<br> <br> I think there may be something wrong with this instructable? (It's probably me doing something wrong.)<br> <br> If I use a 350 ohm resistor my LED overloads. I am seeing 21mA and 1.74 V across the LED (not 615 mV like in the last page).<br> <br> If I use a 421 ohm resistor as the color code in the later pictures indicates the LED works correctly. I get 17mA. (and 1.74 V across LED still.)
Also, I wonder if there is a way to see the detailed specs on the various components . . .
I think if you load the project up (I right clicked the name in the iframe of step 7 [<a href="http://123d.circuits.io/circuits/19390" rel="nofollow">http://123d.circuits.io/circuits/19390</a>]) and hit the &quot;fork&quot; button you actually get your very own copy of it to investigate. &nbsp;So that's pretty cool and actually pretty helpful.<br>
You may care to at least nod to the free &quot;<strong>PEEBLE</strong>&quot; (Picaxe Electronic Bread Board Layout Emulator) layout software. It suits a huge variety of components, although it <u>does not simulate</u> their action. It's available on line =&gt;&nbsp;<a href="http://www.4dsystems.com.au/downloads/pebble/P_for_IE.html" rel="nofollow">http://www.4dsystems.com.au/downloads/pebble/P_for_IE.html</a> or can be downloaded for local use.<br> <br> FWIW I still use (educationally) the UK sourced&nbsp; &quot;<strong>Crocodile Clips</strong>&quot; simulation software that was first released some 15 years back!&nbsp; It's now owned by Yenka - check =&gt;<a href="http://www.yenka.com/technology/" rel="nofollow">http://www.yenka.com/technology/</a>
Wont you use google login integration as well?
Pretty cool! Gonna try it! =D Results later! ;)
Is it free to create an account?
Yes, account will always be free for open designs. I you want to make your designs closed source, you need a subscription.
And how much would that be? <br> <br>I can see this being useful for schools - do they do educational subscriptions?
You can find the different subscription tiers here: http://123d.circuits.io/pricing<br><br>Educational discount if of course available. Just email us.

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