Fast Edge Generator Case

prusaprinters

<p>A case for a small PCB, a 9V battery with a hole for an SMA connector.</p> <p>This Fast Edge Generator can be used to determine the bandwidth of an oscilloscope, provided that the actual edge that is being generated is fast enough.</p> <p>Additionally this circuit can be used to measure the length of a coax or determine the position of a fault in a coax by measuring the delay between the initial edge and the reflection.</p> <p>The datasheet states that the absolute maximum for the supply voltage is 7V, please keep that in mind. I'd definitely recommend using a 5V linear regulator after the 9V battery to be safe. <a href="http://cva.stanford.edu/classes/cs99s/datasheets/74AC14.pdf">http://cva.stanford.edu/classes/cs99s/datasheets/74AC14.pdf</a></p> <p>Bandwidth = 0.35 / Risetime</p> <p>The IC used is the 74AC14, the HC variant is slower: <a href="https://youtu.be/vvIuJUVV4VY">https://youtu.be/vvIuJUVV4VY</a></p> <p>Here's an excellent video on this generator (includes schematic): <a href="https://youtu.be/9cP6w2odGUc">https://youtu.be/9cP6w2odGUc</a></p> <p>Example schematic: <a href="https://i1.wp.com/marcusjenkins.com/wp-content/uploads/2015/02/tdrGenerator.png">https://i1.wp.com/marcusjenkins.com/wp-content/uploads/2015/02/tdrGenerator.png</a></p> Category: 3D Printing