Materials. The lathed spline screwed nicely into the 8mm female thread on the motor shaft, and a lock-nut completed the union. Part 1: the basics – as published in the December 2018 issue of PBO. They come in various models including the Nano that costs just £3. This should not daunt you as they are easily available. He bought Radioactivity, a UFO 27 which he cruises and races, in 2015. The motor, control systems and batteries are the main components, but figure on another £100-£200 to cover enclosures, transition pieces, wire, switches, connectors, and, of course, things going up in smoke. The MDF can be substituted by some other material like acrylic. The battery would be separately mounted and connected via flexible electric cable. I removed everything north of the driveshaft housing and re-sold those components for £5. DIY MINI Electric CAR: DIY at HOME will teach you how to make a super fast mini electric car toy very simple very easy using a 9V battery and powered with a dc motor for school science projects for kids !! I also had to learn how to code the software. While it’s possible to get 12V motors in this power range, they would draw over 90A at full power, requiring unacceptably heavy wires. And there's more for owners of sail or power: Engine mounts, bilge alarms, navigation lights and interpreting weather forecasts. and live alone and have nothing better to do with my time and money so onwards I went. I decided on a brushless DC motor because they are generally reliable and don’t require maintenance of brushes. With the learning and setbacks the project took me about six weeks of evenings. Hopefully plug/socket from the hall sensors on the motor will match the plug/socket on the controller hall sensor line, otherwise go figure it out. The downside to lithium-ion is the cost. In addition there was a far wider range of motors available at 48V. Testing the assembled electronic components on the bench. I located a 1974 Johnson 2hp outboard on ebay for £24. All have a built-in charge controller, and all require an external mains charger. Connect the sensor plug on the controller to the sensor socket on the motor. An oscilloscope is also useful, I used a PicoScope USB-type that plugs into my laptop. They are programmed from a PC using a language derived from C (you’ll need to know a bit about programming to know what that means). As a display I initially intended to use a cheap, rugged, reliable two-line, 16-character LCD display of the sort that are well known to work with Arduinos. Connect the battery positive and negative to the motor controller positive and negative, and give the throttle a twist. You can substitute the pencils for a cylinder that’s roughly half an inch in diameter. This will give you something solid to wrap your coil around. he built his own 1kW electric outboard motor for under £600, The finished electric outboard on the bench Zipping around Largs with the home-built electric outboard. You may wish to structure your project differently – a significant simplification could be made by discarding computer control. Because I have longer-term aims of making the system fully remote controlled (essentially a drone, perhaps for wildlife photography), and for that I needed complete mastery of the control system, which is achievable if I build it myself. Well, my motivations were as follows: 1. My project utilised computer control and a lot of new-to-me equipment such as touch screens, Bluetooth, Arduinos and oscilloscopes. In addition most controllers have a reverse function which requires connection of a switch. 3. This month we get aboard three new outboard-powered day boats – inland and coastal – plus we deconstruct the calculations that define the limits of your sailing boat's performance. 1. The first hurdle was to mechanically connect the electric motor to the donor outboard engine. Science Physical Science. It is possible to make an electric motor go backwards as well as forwards but be cautious doing this on an engine which originally had no reverse because the gears won’t be designed to operate backwards and there won’t be a thrust bearing to keep cogs in check. Most motors in this power range run at 48V or above. Tape the pencils in a two by two cluster. 3. Plus weeks of your time. I used a multimeter and figured it out for myself. It will almost always be possible to buy a petrol outboard for less. My project utilised computer control and a lot of new-to-me equipment such as touch scree… Electronic control systems would be mounted alongside the motor. A 68 Mustang Fastback makes the perfect DIY electric car. 2. Watch this space for part 2: programming the motor’s electronic controls. Finding which wire does what in a manual-free wasteland is very challenging. What started as an idea to produce our own simple, fun, affordable electric vehicle has evolved into a DIY project easily assembled by nearly anyone. At this point the motor, donor engine and driveshaft are all connected, so to avoid accidents with a fast-spinning prop it’s a good idea to remove the propeller and not replace it until you’re going to use the motor in water. This will bring the total budget to around £500-£600. Readers and experts throughout every issue of PBO. I then sent this to a laser cutting company, who cut it out of 10mm thick aluminium for around £25. Olly Epsom is a chartered engineer specialising in renewable energy, particularly wave power. To keep myself occupied at home, alone, over the long nights of a Scottish winter (over previous winters I’ve constructed a navigation system, an autopilot and solar water heaters). Tape together four pencils. Usually red and black (5V and ground) and green, yellow and blue (which take the signals from the three hall sensors in the motor). 2. To embark on a project like this requires a basic knowledge of electronics and mechanics, but should be within reach of most practical people with a willingness to learn.