user14025: I am newbie, I am afraid of doing harm and getting a burned-out Beagle Bone Black. I have soldered this SparkFun Logic Level Converter - Bi-Directional.    
I have several questions:

How can I check if my converter works correctly without connecting it to any board or at least only to an Arduino?
How should I connect all my schematic from bbb to converter and then to an Arduino. I have a bi-directional converter, BTW. Can someone draw a simple picture of how to connect?    

I would be grateful for any help. 

user4143: The simplest method of connection is just to plug the Arduino into the BBB's USB socket.  That way there's no level conversion or anything needed - you can just open the serial port and communicate through that - what could be simpler?
You can even install avrdude on the BBB itself and upload code (HEX files) direct from the BBB, and the BBB supplies all the power.

user15478: In addition to the other methods listed, which will both work, you could also use an Arduino that uses 3.3V logic and connect the serial/UART.
The Trinket: https://www.adafruit.com/products/1500?gclid=COGOxqq-z8kCFcYRHwodpL8P2A
Pro 328: https://www.sparkfun.com/products/10914

14025: <p>I am newbie, I am afraid of doing harm and getting a burned-out Beagle Bone Black. I have soldered this <a href="https://www.sparkfun.com/products/12009" rel="nofollow">SparkFun Logic Level Converter - Bi-Directional</a>.    </p>

<p>I have several questions:</p>

<ol>
<li><p>How can I check if my converter works correctly without connecting it to any board or at least only to an Arduino?</p></li>
<li><p>How should I connect all my schematic from bbb to converter and then to an Arduino. I have a bi-directional converter, BTW. Can someone draw a simple picture of how to connect?    </p></li>
</ol>

<p>I would be grateful for any help. </p>
 4143: <p>The simplest method of connection is just to plug the Arduino into the BBB's USB socket.  That way there's no level conversion or anything needed - you can just open the serial port and communicate through that - what could be simpler?</p>

<p>You can even install avrdude on the BBB itself and upload code (HEX files) direct from the BBB, and the BBB supplies all the power.</p>
 15478: <p>In addition to the other methods listed, which will both work, you could also use an Arduino that uses 3.3V logic and connect the serial/UART.</p>

<p>The Trinket: <a href="https://www.adafruit.com/products/1500?gclid=COGOxqq-z8kCFcYRHwodpL8P2A" rel="nofollow">https://www.adafruit.com/products/1500?gclid=COGOxqq-z8kCFcYRHwodpL8P2A</a>
Pro 328: <a href="https://www.sparkfun.com/products/10914" rel="nofollow">https://www.sparkfun.com/products/10914</a></p>
