45 MP3 sound decoder v4

A realise the MP3 player using the MicroSD in the size of the N-Gage.
Compact than the previous version. Further added the ability of the motor decoder.

MP3 decoder

・Size 67mmx14.5mm
・Correspondence from F0 to F28 in the function of DCC
・Capacity of the memory cards is up to 32GB
・Quantity of high-pitched tone power-saving by D-class amplifier Built in
・Repeat reproduction is possible by a command
・I use a regulator IC for cost reduction(Switching power supply available as an option)

　
A PDF version is this

Artwork

・DCC library of NMRA is necessary for this sketching
・Hardware is based on the SmileDecoderR4's Desktopstation.
　Please use this for library also NMRA DCC Library 2014-10-15 edition. (DesktopStation site)
・DFPlayer_Mini_Mp3 library for MP3 reproduction is necessary.

Writing is not required, so we have shipped confirmed the operation in a state in which the written
latest sketch for distribution products.
Modified with self-responsibility is the free.
If you can not resolve on their own, those who Arduino do not know, you can hope that not written
in a smile writer.

The reading of CV is possible with a direct mode.
Is possible with the Page mode, but recommends a direct mode.
Reading may not go well when do not connect load to the terminal of the motor.

The MicroSD card, please use the 32GB following.

Format of the MicroSD card

Case 2GB below will choose the"FAT" in the "file system".
If following the larger 32GB than 2GB is required format in FAT32.

After having formatted, make a directory (folder) MP3 from a PC..
　　case of do not work when make plural folders.
.

Function Number and file name is linked.

Like the F1 → 0001.mp3 ~ F28 → 0028.mp3
Please put the file in the folder you created.

Write order does not matter.

It is difficult to stably output the sound during driving.
Should be always the rails and the wheels keep kept in good condition.
Moment from the rail with a slight vibration and movement, but you may want to contact loss.
In the electronic device equipped with a microcomputer, it will be not function a very slight momentary expires.
For this reason, it has maintained its functions correctly by backing up in the capacitor and the battery in the circuit of the equipment.
For alleviate this, to back up the power supply by adding a large in the electrolytic capacitor of the little capacity of KeepArive capacitors with an external board, to prevent a power failure caused by the moment away line.

Please connect with the terminal for the KeepArive capacitor of the circuit board.
The side where there is a described as a "+" on the circuit board will be the + side of the capacitor.

The width of the board is 14.5mm　breadth of the N gauge,
but concerning the structure of the body head and the vehicle in the vehicle of some makers,
There is a vehicle having difficult implementation.
Please implement it after enough examination in implementation.
I will recommend the implementation to the vehicle which it is easy to implemented..

In the case of Meitetsu 6000 Series in MicroAce 

Make sure the unit will fit.(the board is different from a real board in a trial product)

The board width assumes it 14.5mm in a design.
When it is hard, not to cut a print pattern; the width of the boardI adjust it. Match the body with a floor board in this state,
It is properlyI confirm whether it is a circle. The seat parts which a floor board has concerning heightIt is necessary to exclude .

I attach KeepArive condenser next. The photograph implements it without attaching resistance + diodeBut, of the apparatus
I recommend that I soak resistance + diode for the protection.

Processing (when necessary) of the floor board

Work such as processing a floor board because I may not enter the body may be necessary for the size of the speaker.
Because the volume of sound changes in size and enclosure presence,
I examine the speaker by each person, and, please implement it.(please use an optional speaker)

 

If the body and a floor board are settled well, it is implementation completion.

1. When used in combination with the motor, it may motor driver and diode bridge becomes hot by the current
　　consumption of the motor.
2. CV read-write of and make sure that it works in the current consumption of the bridge driver.
　　If the motor terminal there is no load you may not be able to read and write CV.
　　In this case, it allows you to read and write by connecting such as resistors and LED to the motor terminals.
3. Speaker terminal Please do not short-circuit. (D-class amplifier PAM8408 will be damaged)
4. Regulator IC of the power section will have a fever, but this is not a fault.
　　However, the case is a high temperature of about not touch under no load, there is a possibility that failure
　　 in some kind of reason.
　　In this case, please discontinue use because the continued use is dangerous.
　　If you heat generation is a concern, it is recommended that you replace the option of switching power supply.
5. MicroSD is Correspondence with the following SDHC 32GB
　　MicroSD card is 2GB or less FAT16,32GB following is required format in FAT32.
6. MP3 files, in some cases it may not be able to play.
　　Sample has been supported by the MP3 chip (YX-5200) rate is 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48KHz.
7. For MP3 sound source
　　For the source of the MP3 of the sound source, we have developed on the premise for you to use the sound
　　 of their own preference.
　　This site does not do me of the sound source.

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