Latest MegaDrum schematics. 32 inputs.

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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby mr.xiro » Sat Oct 11, 2008 8:08 pm

I can not find R 6.2k, 6.8k change in the future?
and found no inductor 1mH, can not be done?
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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby dmitri » Sat Oct 11, 2008 8:59 pm

mr.xiro wrote:I can not find R 6.2k, 6.8k change in the future?

You can replace it with 6.8k. Gain range will be slightly smaller.

and found no inductor 1mH, can not be done?

It is 1uH in fact but you can use anything between 1uH and 1mH.
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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby johnvpr » Wed Oct 15, 2008 4:44 pm

Please see if my shopping list is OK!

and there is an online shop in europe where to buy all components togeather and have a good price?

Digital Board

Condenser
1 * 1uF
4 * 22p
5*100n
1*470n

LED
IC 1N4148
IC MEGA32-P Atmega32-16PU
IC PIC18F2550

Inductor between 1uH and 1mH

Resistors (metal 1/4 watt)
4* 330
3* 1k
2* 33
4*220
2*10k
7*4k7
1*3k3
1* 6k2


IC 6N138N or 6N138

USB Type B Socket

Crystal 16MHz
Crystal 12MHz

Analog Board
32 * 100 Condenser
2 * 100n Condenser
4 * 4051 IC
64 * BAT85 Diode


Other
STRIP OF CONTACTS
DB25 female
DB9 female
DIL40 for MEGA32
DIL28 for PIC18F2550
DIL8 for 6N138N
DIL16 for 4051 x 4
Connectors HE-?? (which ???)
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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby dmitri » Wed Oct 15, 2008 4:57 pm

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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby japi » Thu Oct 30, 2008 2:04 pm

What happens if you use the 4051 without the BAT85s ? Or use another more common like 1N4148 ?
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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby dmitri » Fri Oct 31, 2008 4:39 pm

You may damage the ICs.
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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby japi » Fri Oct 31, 2008 4:52 pm

I see.
Thanks :)
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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby scilence » Mon Dec 08, 2008 2:55 pm

can you use the 4851 with the bat85's?
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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby Synthex » Mon Dec 08, 2008 3:27 pm

scilence wrote:can you use the 4851 with the bat85's?

Yes you can, but it is useless.
4851 = 4051 with bat85.
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Re: Latest MegaDrum32 schematics. 32 inputs.

Postby kapu » Sun Mar 22, 2009 8:46 pm

dmitri wrote:
jamalpiper wrote:I have a question about the programming cables, Is it at all possible to program the Atmega from a a 9pin COM port? My computer only has that style.

Schematics would help if its possible.

As far as I know it is not possible.


I have used this to program my Atmega via 9pin COM port
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