Latest MegaDrum schematics. 32 inputs.

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Re: Latest MegaDrum schematics. 32 inputs.

Postby dmitri » Tue Jun 28, 2011 3:02 pm

timero wrote:hi! im new with diy.. it my 1st time trying since i really want to build this beast. i have no knowledge in schematics that's why im studying through the net for a week now just to gain a few understanding of building the megadrum.. now i think i can start building my own megadrum but i just wanted to ask some things before i begin with this project.

Judging by your words and questions below I should say that MegaDrum will be a too difficult project for you. You may many hours of your time and end up with frustration.

1st. i wanted to use 4851's so i wont have to use the BATs. i read in this thread that i can still use the analogue pcb (just remove the BATs and replace input protection resistors with jumpers)
Q: what resistors should i replace? Are they R2,R6,R10 and R14?

Search the forum, it's been answered many times.

2nd. I really don't know where to use the IC sockets (are they suppose to be connected to the pins of the IC's?), PINS array 36x1 and cable mounting sockets?

First of all, find out what IC sockets are and what they are used for.
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Re: Latest MegaDrum schematics. 32 inputs.

Postby timero » Tue Jun 28, 2011 3:15 pm

is that so? well i will still try. actually i don't mind being frustrated since im used to it... :D i have done many things that are far beyond knowledge but still managing to finish it with successes. thanks for the reply and thanks for this great project.... peace...
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Re: Latest MegaDrum schematics. 32 inputs.

Postby Techbuilder » Mon Aug 22, 2011 12:58 pm

Hi everybody I was hoping you might be able to help me out with a quick question
Do I need Bat85s since Ill be using 74HC4851N?

any information would be greatly appreciated
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Re: Latest MegaDrum schematics. 32 inputs.

Postby Firelord » Mon Aug 22, 2011 2:30 pm

Techbuilder wrote:Hi everybody I was hoping you might be able to help me out with a quick question
Do I need Bat85s since Ill be using 74HC4851N?

No.
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Re: Latest MegaDrum schematics. 32 inputs.

Postby Maylord.war » Tue Apr 03, 2012 8:44 pm

If i use ICs 4851 all the 100ohm resistor in the analog board are required or i can replace with wires?
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Re: Latest MegaDrum schematics. 32 inputs.

Postby dmitri » Tue Apr 03, 2012 9:52 pm

Maylord.war wrote:If i use ICs 4851 all the 100ohm resistor in the analog board are required or i can replace with wires?

The answer is right in this topic.
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Re: Latest MegaDrum schematics. 32 inputs.

Postby Maylord.war » Tue May 15, 2012 3:55 pm

Hi Dmitri

Excuse me it's possible to put 12mhz and 20mhz (instead 16mhz) and a atmega644/1284 (instead atmega32) ?

Thanks
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Re: Latest MegaDrum schematics. 32 inputs.

Postby dmitri » Tue May 15, 2012 4:04 pm

Yes.
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Re: Latest MegaDrum schematics. 32 inputs.

Postby Maylord.war » Wed May 16, 2012 3:03 pm

Thanks a lot Dmitri :D
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Re: Latest MegaDrum schematics. 32 inputs.

Postby rtoorek79 » Sat Jun 02, 2012 3:24 pm

Hi,

is there any significant difference between bat85 and bat85s diodes for MegaDrum? I've used bat85s (price :)) and I wonder if this was a mistake.
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