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I modified TOMYTEC 1/150 scale “The Trailer Collection“ into a radio control car. The motors are LA4-466FB for both steering and running. Wireless communication is done with two RN4871U (Bluetooth module). RN4871U must be set up for communication before assembly. Wireless communication from trailer head to trailer is infrared remote control. The transmitter is built on the breadboard. The microcontroller used is ATmega88V for the transmitter, ATtiny3217 for the trailer head, and ATtiny412 for the trailer. The power supply for charging the trailer head is DC 5V. I omitted the trailer charging circuit. The grid of the cutting mat in the video is 5cm square. TOMYTECのトレーラーコレクションをラジコンに改造しました。 モーターはステアリングも走行用もLA4-466FBを使いました。 無線通信は2つのRN4871U（Bluetoothモジュール）で行っています。 RN4871Uは組み立てる前に通信の設定をしておく必要があります。 トレーラーヘッドからトレーラーへの無線通信は赤外線リモコンです。 送信機はブレッドボードに組みました。 使用したマイコンは送信機がATmega88V、トレーラーヘッドがATtiny3217、トレーラーがATtiny412です。 トレーラーヘッドの充電用の電源はDC5Vです。 トレーラーの充電回路は省略しました。 動画中のカッティングマットのマス目は5cm四方です。 ---------------------------------------------------------- 【FAQ】 [Q] Can I sell your artwork? [A] I often remove small parts from my creations to reuse in future pieces, so most of what I make no longer functions properly and therefore cannot be sold. [Q] Won't exposed copper wire short circuit? [A] The wire is an enamel wire (magnet wire) coated with insulation material on the surface, so it doesn't short circuit. [Q] Where did you buy the parts? [A] I often buy electronic components from the online stores of “Akizuki Denshi“ or “Marutsu“. Additionally, I disassembled a large quantity of junk digital cameras that I acquired from Yahoo Auctions and picked up stepping motors, gears, shafts, photosensors, ultra-small switches, and other components. [Q] It looks like there are no marking-off line, but are you processing everything by eye? [A] It's hardly visible on the camera, but I mark them with a needle or cutter. [Q] Why don't you make printed circuit boards? [A] Since I'm not mass producing, it's quicker to use universal boards. Also, to make it smaller, I sometimes have to modify the pins of SOT or SOP packages and solder them, which is difficult to do with a printed circuit board. Also, it's common to change electronic components after testing, so a universal board is easier to work with. [Q] It's difficult to solder chip components even with a loupe, but you do it well. [A] I solder with a microscope. [Q] I was disappointed because I thought even the power windows and wipers would work. [A] Please give me a break... [Q] How long did it take to create it? [A] It took several months. [Q] Can you tell me the cost of materials? [A] Since I use a lot of parts and junk parts that I already had, there are many items for which I do not know the price. [Q] Please make a drone. [A] I do not have the knowledge to make a drone, so I cannot make one. Even if I could make one, I cannot think of any differentiation from those who are currently making drones. [Q] Please make your micro RC car drift. [A] As the car gets smaller, it's already a challenge just to make it run normally, so there's no room to make it drift. [Q] Please make the model run faster. [A] It is difficult to make a small model run slowly, so I intentionally run it slowly. Also, I do not make it run faster because it would look too toy-like and lose realism. Additionally, if the model is driven by a stepping motor, it cannot run faster. [Q] Please modify a Hot Wheels. [A] Since many other people are already modifying Hot Wheels, I currently have no plans to do so. [Q] What is the development environment for microcontrollers? [A] I write programs in C-language using Microchip Studio 7.0 and run them on AVR microcontrollers. ---------------------------------------------------------- 【Circuit Diagram】 [Transmitter] [Trailer Head] [Trailer] 【Program】 [Transmitter] [Trailer Head] [Trailer] 【twitter】 【Setting up RN4871U】 since:2021-09-22 until:2021-09-27_17:10:00_JST&src=typed_query&f=live 【Music】 Broken - Patrik Patrikious .
