Dude... I swear. Your videos are incredible. Excellent pace, extremely clear, entertaining, and great content every time. Keep it up!! Other channels need to take notes!!
Neon signs have been around since the 1930s and it would not have been too difficult for sign makers to create a wall-size map of the City of London (or wherever) and offer a "shortest route calculation" service for taxi and delivery drivers. I guess no one thought of it at the time?
i thnk it can be done with a naked wire and a potenciometer. while you increase the power between the in and out gates, it will turn hot red. it can be seen with a thermal camera.
Nice demonstration. It reminded me of Paris' metro's visual itinerary indicators ( upload.wikimedia.org/wikipedia/commons/9/91/Metro_Paris_-_Ligne_3_-_station_Pont_de_Levallois_-_Becon_-_Indicateur_itineraires.jpg )
[EDIT: In fact, he did.] Did you put two diodes on the paths that could potentially go in either direction? If not, you constrained the solution apriori.
I wonder if one can use a network of tubes and water to model the same problem . The shortest path will be the one with the least resistance and presumably the greatest flow rate of water out of the node tested . I have read that hydraulic computers / intergraors have solved very complex problems in the 40s up to the 80 s I have observed this problem when I am filtering my Hooch in a tube of activated carbon ... where I don't actually want the shortest path to occur
Most efficient pathfinding algorithm. Also, the 2nd-to-last comment was posted a year ago, followed by one 11 hours ago. I actually searched for this (analog computer)... Quarantine boredom gets to you
I wonder if anyone is about to build real world model with all the roads on it :) that would be not only cool, but very useful. Could be possible in a nano scale
I have like 40 sheets of different thickness 40cmx50cm copper clad lying around here too, but usually can't be arsed to cut it into pieces, especially not that many and that small
+Dennis Lubert I actually just cut a few long pieces, then made breaks in the copper paths with a metal file. I also have a sheet metal shear that makes short work of cutting up the PCB, especially when dealing with larger pieces.
+chrizlax Yes, in fact pretty much anything with a PN junction (zener, LED, switching diode, another BJT, etc) could be used there and would provide better regulation over supply and temperature changes. The supply voltage still needs to be large enough to accommodate the LED voltage drops, of course.
+Alan Marshall Any reduction in the number of LEDs will reduce the total voltage drop across the LEDs and hence reduce required supply voltage. However, only placing LEDs at the junctions means that the path with the fewest junctions will be illuminated, which is not necessarily be the physically shortest path.
Yep you are correct. I just drew a diagram of a really large circular path without junctions from an entrance and another smaller path with two junctions coming from same entrance and of course the two junctions path is physically shorter than the meandering circular path without a junction.
+Alan Marshall Still a useful idea though if you want to find the path with the fewest number of turns. A delivery truck in a busy city, for example, may want to take the route with the fewest left hand turns.
