Problem sourcing some parts for the GM5

Parts Questions
1

Hello,

It is not easy for me to source two parts for the GM5 in the Netherlands…

1000nF (1uF) Ceramic

and the 16Mhz Crystal

for three GM5 boards. I have verified with Voti and a local store. Both don’t source the 1uF ceramic capacitor. Does anyone have these in the Netherlands for a reasonable price, without me having to pay an absurd high price for shipping costs? (like what webstores do for just these parts).

greets,

Gerard

2

Have you tried the places on here?

http://www.midibox.org/dokuwiki/doku.php?id=where_to_order_components

RS were the cheapest shipping / minimum order wise i could find for Ireland,

im guessing they would be similar for Holland:

http://www.rs-components.com/index.html

Farnell came 2nd but they required a minimum order of 35 euro.

3

hi, this should not be a problem. i have to make an order with Reichelt this week anyway.

so if you like you could pm me your list of things you need and we can combine our orders.

4

the 1uF cap doesn’t have to be ceramic. Any film cap will do as well. I accidentally soldered a 100nF cap into one of mine *cough* and it also works without any problems.

5

This seems like the right topic… I happen to have an 18 mHz crystal: will the GM5 circuit tolerate the 2 mHz difference in speed?

Thanks!

6

@rosch

Finished it now. Thanks for those missing parts.

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midibox GM5
midibox GM5640×481 74.9 KB

7

I happen to have an 18 mHz crystal: will the GM5 circuit tolerate the 2 mHz difference in speed?

Unlikely.

8

As the GM5 is a pre-programmed Atmel AVR, the MIDI (serial) port speed will be referenced to the clock speed, it may work but the MIDI speed would be 35154 baud (and not 31250) so it wouldn’t be able to talk to anything :slight_smile:

Phil

EDIT: It probably wouldn’t work as 8Mhz (16/2) is the maximum clock speed of the AT90USB162

Phil