 All right, boat. Let's see what we can do about a speed control for you. I've got this nichrome wire, which is supposed to be fairly resistive like a copper wire Has very low resistance. It'll let the electricity go through very easily This has significantly more resistance in it than a copper wire So depending on the length that I put the electricity through it will it will change How fast the electricity can get to the motor so if I put the electricity through a short piece of this It'll only slow down the electricity a little bit if I put the electricity through a longer piece It'll slow down the electricity a lot So I need to figure out what length I need to cut that nichrome wire to get maybe like a Third speed two third speed and then full speed it will bypass the wire So I need I need two two pieces of wire That are going to give me a third speed and a two third speed more or less so I need to know the resistance of 10 gauge nichrome wire per Millimeter per inch per foot a meter anything. Let's see if the internet can tell me. Oh, I also need to know The resistance of the motor And I just went out and looked at it and it's a 0.75 Kilowatt motor so it's a hundred 750 watt motor which is actually less than I was thinking it was I thought it was an 1100 But I guess I switched it at some point which is great. It uses less electricity than I was thinking and It goes it still goes fast because that's the motor. I have been using for a while so let me look up the specs on the 750 watt leason 24 volt motor and Specs on this nichrome 10 gauge nichrome wire Okay motor voltage 24 volts The current is 39 amps And since voltage equals current times resistance, I can take the current and put it under the voltage Well, let's just do that There so voltage divided by current equals resistance 24 divided by 39 is 0.6. I mean 615 blah blah blah I don't I don't need that exact so that's my 0.62 is roughly the resistance of the motor like when it's running I'm having some difficulty finding any information about nichrome wire resistance So and my little resistance meter I think my multimeter isn't giving me very good results I need to get a new one of those. Anyway, I'm just going to do what's going to be more Reliable and give me the definite information. Anyway, I'm just going to take it out to the boat connect one wire to the motor And then connect the nichrome wire to the motor and then touch it to the other wire and it should turn the motor on and then I'll try different spots on the nichrome wire and see See how the speed control works And hopefully I can figure out what length I should use all right. I think I just need a knife some pliers Oh, I just got a message from someone who had the answer So 0.65 ohms per foot is 10 gauge nichrome wire That means to equal the Resistance of the motor I have to use the entire 10 feet. I'm pretty sure this is 10 feet Which would put it as 0.65 Which more or less equals that So that would put me at Roughly a quarter speed. I use the entire piece. All right Let's cut through all the crap What I've got here is the 750 watt motor. So if I connect it directly Um with the wires to the battery, it'll go about 750 watts, right? That uses 39 amps according to the Information on the internet about the motor if I want to run it 500 watts, which will be two-thirds speed I need to add in 0.2 ohms, which is Just over three feet of this here nichrome wire And if I want to run 300 watts, which is It's a little over a third Then I need almost seven feet of the wire And I did a couple other ones because you know If I want to run 600 watts, it's just under three feet of wire if I want to run 400 watts Just under five feet. So I think I think I want the low speed somewhere in the three to 400 range And then the the second speed in the five to 600 range. So And then you know full speed is obviously obviously the 750 so maybe I'll just say Five feet of wire going through five feet of wire That's going to be my slow speed and then going through three feet of wire Will be the the second speed So five feet three feet Great, and now I don't need that So, okay, I've got my nichrome wire here and Let's say I've got the battery here Got the plus and the minus and over here. I've got the motor And we've got the terminals here Now I can just connect one wire directly Right now the other wire Is going to go through the nichrome. How do I make the nichrome wire? Okay, let me just draw Let's draw the nichrome wire like this We'll just make it a fat looking wire even though it's not a fat looking wire at all now if I If this is five feet long total And I divide it into what do I want to do three feet and five feet? Crap I can't I threw away my other paper too quickly. Yeah, I want to do three feet and five feet So let's divide this into Three and two Now if the motor is connected to here Then it's going to go at the low speed because the electricity is going to be going through five feet of Nichrome wire, right now if the motor is connected halfway or not halfway, but So the what so the electricity is only going through three feet of the stuff that will be my 500 ish five or 600 watts And then to get full speed. I just connected right Skipping the nichrome wire So I just need a three part switch. I could do three separate switches But I think a three part switch I made a three part switch before them worked pretty well So a three part switch would basically Be a thing where I push it partway it connects this I push a little further it connects that I push it all the way It connects that beautiful Now I need to figure out how to make this be a useful Shape I don't want to just like a five foot long You know, it's like a meter and a half almost two like meter. Yeah, whatever a little over a meter and a half of wire so uh I should probably coil it so I can make this small so I'll take the wire um And then have the one connection point there and then And then have the other connection point and the other connection point there All right, so I need to cut my I guess I'll cut out a slightly longer piece than five feet because you know, I got my little connection spots I mean, if this is all approximate even if I cut five feet and I lost a little bit of You know distance from the connectors, whatever Um, so I'll cut an approximately five foot piece of this Curl it And divide it into a three-foot section and a five-foot section. Okay before I curl it I need to draw on it with my little magic marker here The three-foot section and then the two-foot section. Okay Got it, you know, I should have done this before but I I just checked the wattage at full speed 24 volts times 39 amps and it's Oh crap was it 936 936 watts is the actual And I guess 750 is you know the output power is not the amount of electricity that's being used so I might want to make my things a little bit higher Because five or six hundred is going to be Not two-thirds It's gonna be less So maybe I want to have six or seven hundred. I gotta redo this gosh You know, I was wondering why those numbers were coming out kind of funny Like they didn't seem right in my head. Okay All right, now we're starting with the actual thing Uh Second speed I probably want to be about 700 watts All right, there's not much change there 4.7 feet total 1.9 feet for the second chunk Um, so if I just cut it about five feet To make it a little shorter. I'll lose a little bit and the connectors Should come out about right. This is all approximate anyway Okay, now I want to go test All right I really need wires need to be on here. You get those off anyway Oh, you know what let's check how our battery is doing I just connected this yesterday afternoon Yeah And today it's the morning it's about 11 Looks like the battery's gone from 26.3 volts up to 27 So it seems like everything's working All right, I will do a much better job on this connection for the real thing Okay, I have the other Into the motor connected to the Nikon wire. All right. I've got plus positive going into the motor And here's the negative And there's the negative for the battery So supposedly If I touch this wire to that wire the motor should turn on at different rates depending on where I touch it on this One All right, come on come on come on work Yeah, I mean I I'm just going by the sound but This one definitely this should be a higher speed This should be a lower speed Oh, it's like the simplest speed control in the universe Oh, that's so cool. All right. What was the distance here? I can feel the wire getting hot too Okay, two feet. That should be my second speed Speed not full speed though and then approximately another three feet on there. That should be my low speed I'll think I need my low speed that fast Yeah, you know what? I think I can use the entire wire because the low speed that's So that's a that's the slowest speed I can get out of this piece of wire If I connect it all the way from end to end and It seems like it's going pretty good. So I think I'm going to do that So I'm going to throw out my entire paper full of calculations And I'm going to use the entire wire and then Let's see a second speed will be Let's see what halfway on the wire does That's a low speed And if I go away halfway on the wire All right wire stop confusing. Oh halfway on the wire would be like, right Yeah, that's funny. Okay, I got it. You know, this is exactly why I don't usually calculate things like I'll get a rough idea of what I'm going for but You know, you can do all the calculations in the world And then you go to put the thing into practice and you look at it and listen to it And it's like, well, I have my instincts are telling me it should be like this Regardless of what the the calculations say so Yeah, let's do it. Maybe I should calculate what the actual I don't care I want the full wire and half the wire whatever that is All right I guess I curl this thing up So it's not such a huge mess But I want to curl it loose So there's lots of air space around it Because I don't want it to actually get really hot. I want it to be able to cool off It'll be out in the open and the air will be blown by so to keep it from overheating Oh right before I start curling it I need to put a mark At the middle so I know where to put the second connector Where's my marker? You know, I don't even have to really put a mark here. It's As long as it's approximately right, you know, I could just bend the bend the little loop for the connector At the three points I want and then yeah, let me do that You know, I've never actually worked with this wire before I can bend it without it breaking, right? How much can I bend it? I'm going to hope that I can bend this into one little thing That is the screw will fit through. I guess I'm going to get the screw and bend it around and then The coil I'm not worried about that because it's not going to bend it tight or anything All right, I guess I guess I just do it All right, let me do one of the end ones first just in case it Breaks or something. I don't want to worry about wasting I can't have the wire. It's kind of hard. It's pretty hard wire. All right That's good for the one connector I've got a quarter inch Bolt here. Let me make it a little bit more snug Oh, no, I made it too snug. Oh, no. Oh perfect. Yeah, okay good All right Well, that looks pretty good. I got my little loop there one in the middle and one at the end So, Jamie, why would you want to build such a primitive caveman speed controller? Well, I'll tell you why This little coil of wire replaces Like this Entire thing that thing there this thing here a whole bunch of wires an extra switch that comes I mean so much stuff it replaces so much. That's it. So simple. Oh my god I think I need to get more of this wire. I'm going to order another piece That's beautiful I want to get it on the boat and make sure it's working and everything But yeah, like what what can go wrong with this is just a piece of wire Even if something goes wrong and the wire breaks or something I can see it twist it back together or whatever Yeah, I had some fiberglass stuff outside and I cut this chunk off painted it blue and Put some bolts in it And that's going to hold my charge controller touch that All right, that looks pretty good I can screw my wires onto there Now I guess I need to make a switch