Instruction of assembling DS-main R2
Introduction of DSmain
DS main is an digital model train controller. This hardware includes the feature of DCC/MM2 shield and Arduino, S88 shield.
Connection between DSmain and PC
- Download CH340G driver software. The download site is Desktop Station's download page.
- Unzio the downloaded file.
- Connect DSmain to PC. You need to select manual driver install. Select browse and type unzipped driver.
- Install the CH340G driver. DSmain will be recognized by PC. Then you remember the serial port number (COMxx).
- After that, run Desktop Station and open configurarion window and configure serial port number. That's all to prepare the hardware. Click Start and play it!
Example of soldered PCB
The followings are soldered photos. Please refer.
Parts list
| Parts no | Parts name | Notes and specification |
| R1 | resistor | 1kOhm, 3mA(typ) |
| R2 | resistor | 1kOhm, 3mA(typ) |
| R3 | resistor | 1kOhm, 3mA(typ) |
| R4 | resistor | 100kOhm |
| R5 | resistor | 1.2kOhm |
| R6 | resistor | 2.2kOhm |
| R7 | resistor | 1.2kOhm |
| R8 | resistor | 2.2kOhm |
| R9 | resistor | 6.8k-10kOhm |
| R10 | resistor | 6.8k-10kOhm |
| C1 | Capacitor | 10V, 0.1uF |
| C4 | Capacitor | 35v,220-470uF |
| C5 | Capacitor | 50V,1uF |
| C6 | Capacitor | 50v,47uF |
| C7 | Capacitor | 50v,47uF |
| C8 | Capacitor | 1uF |
| C9 | Capacitor | 1uF |
| C10 | Capacitor | 0.1uF |
| D1 | LED | yellow |
| D2 | LED | red |
| D3 | LED | green |
| D4 | Diode | 1N4148 |
| D5 | Diode | 1N4148 |
| D6 | Diode | SBM1045VSS |
| D7 | Diode | 1N4148 |
| D8 | Diode bridge | DF08M |
| D9 | Diode | 1N4148 |
| D10 | Diode | 1N4148 |
| SW3 | Switch | Tackt Switch |
| SW4 | Switch | Tackt Switch |
| SW5 | Switch | Tackt Switch |
| SW6 | Switch | Tackt Switch |
| CN1 | Header | 15pin Header |
| CN2 | Header | 15pin Header |
| CN3 | nc | nc |
| CN4 | nc | User's GPIO Header |
| CN5 | ICSP connector | 2x3pin Long socket header |
| CN6 | Track connector | 2pin terminal block |
| CN7 | DC jack | MJ-179P compatible |
| CN8 | S88N RJ45 jack | RJ45 jack |
| CN9 | S88 header | 6pin L connector |
| CN10 | nc | nc |
| CN11 | PWM header | 2ピンヘッダ |
| IC1' | DIP socket | 28pin IC socket |
| IC1 | ATMEGA88 | MCU |
| IC2 | TB6568KQ | Motor driver |
| IC3 | L7805CV | 5V regulator |
| F1 | Poly Switch | Poly Switch 2.5A or 3.0A |
nc means not connected(unused）. Not needed to solder the parts.
DS main specification
Please attention the following specification.
Required items
and 2.1mm jack. Please check your model railway specs.
(Marklin, DCC HO) 12V-16V 2A or more. Akizuki 45WSlim DC power supply15V3A LTE(GFP)451DA-1530.
(DCC N, Japanese HO) 12V 1A or more. Akizuki DC power supply 12V2A STD-12020U.
Soldering procedure
The kit requires the soldering experience. You need to understand PCB's displayments.
- Prepare solder, soldering iron, electric parts, PCB etc.
- Solder electric parts.
- After soldered, check the soldering result. Attention short pins.
- Insert ATMEGA to DIP Socket. Attention the direction and silk pattern.
- Insert attached Arduino nano(compatible) board and check.
Capacitors and diodes and LED has a pole. Attention please.
Assignment of connector and buttons
The following photos show assignment of buttons and connectors.
Assembling
After soldered, assemble Arduino nano compatible board and acryl case. DC power supply connects to DC jack on the DSmain. The connection between PC and DSmain uses USB port of Arduino nano. Connect a USB cable.
Wirign feeder cable
For DCC/DC users:
The poles doesn't care.
For Marklin/AC users:
Ctrack has the pole. The center rail beside is B (red color), the others rail beside is O (brown color).
Marklin CTrack (H0 gauge) wiring example.
Tomix Fine Track (N gauge) wiring example.
Wiring to external analog PWM controller
If you have an external analog PWM controller, DSmain can use the external controler. Please connect as the followinng.
For example, Japan railway company 101 type cab controller DX is available.
