www.megadrum.info

Hello,



Kit v2.8 is NOT available !
The new version v3.1 is available !

- Up to 56 inputs !
- New dimension : 120mm x 100mm
- Use of 18F14K50 for USB

GO HERE : >>>>>> http://www.megadrum.info/forums/viewtopic.php?f=3&t=813 <<<<<<




Before building, please read the PDF and the FAQ section in this post !


PCB v2.8 Professional achievement :
- Double Layer
- Copper Thickness 70 um
- 155 mm x 70 mm with mounting holes
- Top Silk Screening
- Blue Solder Mask



32 triggers inputs connector, USB connector, MIDI connector (In and Out/Through), LCD screen connector, Keyboard connector, ICSP connector ...
Fully USB plug'n play, works with all Windows like XP and Vista, Mac OS, Linux, ... (Fully USB2 compliant)
All 32 Inputs of this kit are protected against ±15kV electrostatic discharge (ESD) shocks (Fully IEC1000-4-2 compliant)
Lot of features : USB on board, Optional external power, and much more ...

The schematic :


Here is a quick Manual with the List of components, Connectors pinouts and Schematics :


Three kits are available :

Kit 1 :
The new PCB v2.8 + ICs :
- PCB : NEW 32 inputs "All In One" PCB v2.8
- ICs : 1* Programmed Atmega32-16PU with bootloader and clock selection
- ICs : 1* Programmed 18F2550 USB 2.0
- ICs : 4* 74HC4851
The total of the order for the PCB v2.8 + ICs is 55 euros.
This price include Registered airmail with signature required, anywhere in the world and fees.

Kit 2 :
The new PCB v2.8 + PCB Components :
- PCB : NEW 32 inputs "All In One" PCB v2.8
- Resistors (metal 1/4 watt) : 1* 47, 3* 100, 4* 220, 1* 470, 3* 1k, 8* 4.7k, 1* 6.2k, 2* 10k, 4* 47k
- Capacitors : 2* 15pF, 2* 22pF, 4* 100nF, 2* 220nF, 2* 470nF, 3* 47uF, 1* 100uF
- Inductors : 1* 1mH
- Diodes : 3* 1N4148
- Crystals : 1* 20MHz, 1* 16MHz, 1* 12MHz
- ICs : 1* Programmed Atmega32-16PU with bootloader and clock selection
- ICs : 1* Programmed 18F2550 USB 2.0
- ICs : 4* 74HC4851
- ICs : 1* 7805, 1* 6N138
- ICs Sockets : 1* 8 pin, 4* 16 pin, 1* 28 pin, 1* 40 pin
- Connectors HE-14 male : 3* 2 pin, 1* 4 pin, 4* 5 pin, 1* 6 pin
- Connectors HE-10 male : 1* 2x8 pin, 1* 2x20 pin
- Connectors HE-10 female : 1* 2x8 pin, 1* 2x20 pin
- Connector USB : USB Socket type B
The total of the order for the PCB v2.8 + PCB Components is 80 euros.
This price include Registered airmail with signature required, anywhere in the world and fees.

Kit 3 :
The new PCB v2.8 + PCB Components + Displays + Buttons :
- PCB : NEW 32 inputs "All In One" PCB v2.8
- Resistors (metal 1/4 watt) : 1* 47, 3* 100, 4* 220, 1* 470, 3* 1k, 8* 4.7k, 1* 6.2k, 2* 10k, 4* 47k
- Capacitors : 2* 15pF, 2* 22pF, 4* 100nF, 2* 220nF, 2* 470nF, 3* 47uF, 1* 100uF
- Inductors : 1* 1mH
- Diodes : 3* 1N4148
- Crystals : 1* 20MHz, 1* 16MHz, 1* 12MHz
- ICs : 1* Programmed Atmega32-16PU with bootloader and clock selection
- ICs : 1* Programmed 18F2550 USB 2.0
- ICs : 4* 74HC4851
- ICs : 1* 7805, 1* 6N138
- ICs Sockets : 1* 8 pin, 4* 16 pin, 1* 28 pin, 1* 40 pin
- Connectors HE-14 male : 3* 2 pin, 1* 4 pin, 4* 5 pin, 1* 6 pin
- Connectors HE-10 male : 1* 2x8 pin, 1* 2x20 pin
- Connectors HE-10 female : 1* 2x8 pin, 1* 2x20 pin
- Connector USB : USB Socket type B
- Cables Connectors HE-14 female wired : 2* 2 pin, 1* 4 pin, 2* 5 pin
- Display : 1* LCD Display 2*16 Blue, 1* LED 5mm
- Keyboard : 4* High quality push buttons
For the LCD display, you can choose between :
1) blue characters on a black background
2) yellow green characters on a black background
3) white characters on a blue background
The total of the order for the PCB v2.8 + PCB Components + Displays + Buttons is 105 euros.
This price include Registered airmail with signature required, anywhere in the world and fees.


Note : A donation of 10 euros is included in the price for Dmitri.


Payment may be made by bank transfer or by PayPal.


Please send me a private message to order the kit you want.
Thank you.


Best regards,
Synthex


All v2.7 Kit history : http://www.megadrum.info/forums/viewtopic.php?f=3&t=187
All v2.4 Kit history : http://www.megadrum.info/forums/viewtopic.php?f=3&t=108

















A final result :




FAQ section :

---------------------------------------------------------

Do NOT use an external power supply when connecting to a PC over USB.
If the external power supply doesn't have good ground isolation it may cause problems and even damage either MegaDrum or a PC.

---------------------------------------------------------

The components must be located on the side of the top white silk screening.
You just need soldering on the bottom side.
Holes on the pcb are copper coated to connect both sides of the board.

---------------------------------------------------------

Component label = PCB label

yellow violet black gold = 47
brown black brown gold = 100
red red brown gold = 220
yellow violet brown gold = 470
brown black red gold = 1k
yellow violet red gold = 4k7
blue red red gold = 6k2
brown black orange gold = 10k
yellow violet orange gold = 47k

15 = 15pF
22 = 22pF
104 = 100nF
D224 = 220nF
470nk = 470nF

12.000 = 12MHz
16.000 = 16MHz
20.000 = 20MHz

There is no polarity for these components

---------------------------------------------------------

For the LCD, you can use for the "R lcd" :
- A 100 ohms resistor or less for the White / Blue LCD
- A 470 ohms resistor or less for the Blue / Black LCD
- A 47 ohms or less or no resistor for the Green / Black LCD

---------------------------------------------------------

The bigger than the other resistors provided, with a SILVER ring, is the inductor, go on the spot labelled "1mH".

---------------------------------------------------------

With your Atmega32 kit, you must use the 16 MHz crystal, go on the spot labelled "16MHz 20MHz".

---------------------------------------------------------

Atmega32/324/644 all have the same pinout.

---------------------------------------------------------

Red push-buttons must be wired between the "C" pin (common) and the "NO" pin (normally-off).

---------------------------------------------------------

1N4148 component (diode) has a polarity.
On the PCB, the square pad is the positive.
On the component, the black ring (or yellow) is the positive.

---------------------------------------------------------

Will you accept custom orders? For example, the so claimed kit with only the board and the IC's?

elrules wrote:Will you accept custom orders? For example, the so claimed kit with only the board and the IC's?

I changed the Kit 1 to propose the "so claimed kit".

How do you decide which crystal to use?

daddy4life85 wrote:How do you decide which crystal to use?

With Atmega32-16PU, you can use the 16 MHz crystal.

Atmega32 is already programmed with the multiclock bootloader and the last firmware.

Here is the PCB Inputs Jacks v1.8 for All In One PCB v2.8 :

http://www.megadrum.info/forums/viewtopic.php?f=3&t=462

New photos have been added.

I'm sorry to ask these stupid questions but... Will I manage with the Kit 2 if I use it only with PC, or are the (keyboard)buttons and the LCD still necessary? Is the MIDI connectors necessary, or can it be used via USB? I'm trying to save money so, can DIY triggers be directly connected to v2.8 PCB without using plugs or any other devices or components? I will probably do those plug inputs later. I will not be using hi-hat controller pedal, or those other fancy 3 zone things for now.

iilimato wrote:I'm sorry to ask these stupid questions but... Will I manage with the Kit 2 if I use it only with PC, or are the (keyboard)buttons and the LCD still necessary? Is the MIDI connectors necessary, or can it be used via USB? I'm trying to save money so, can DIY triggers be directly connected to v2.8 PCB without using plugs or any other devices or components? I will probably do those plug inputs later. I will not be using hi-hat controller pedal, or those other fancy 3 zone things for now.

You can control the megadrum directly with the PC with the MCT software (Megadrum Config Tool).
The MIDI connector is not necessary, it can be used only via USB.
Triggers can be directly connected to v2.8 PCB, but it's better to pass through connectors.

Synthex wrote:You can control the megadrum directly with the PC with the MCT software (Megadrum Config Tool).

So this means that the LCD and the buttons are not necessary when connected to PC?