KIT AVAILABLE !!! All In One PCB Kit to sell !!!

[Synthex]

I have some doubt about this board.

Do I need to change some resistor value? I know that all over this times modifications have been applied for this board, as some components or values seemed to be better (I think)
Could you tell me if all those resistors and capacitors work well or do you recommend me to change any value to make it work better?

And what the hell is that component located up-right close to the atmega? one with 3 leads and a screw over it. What is that? It does not appear in the list

Do you have this board ?
You can use components from the list of version 2.7.

component located up-right close to the atmega with 3 leads and a screw over it, is a trimpot :

pot.jpg

In the list : 10k trimpot (Model 67W, ...)

[elrules]

I have version 2.4

Is the 2.4 list different in resistor values of the 2.7 list? any appreciable change? or are them the same?

[Synthex]

I have version 2.4

Is the 2.4 list different in resistor values of the 2.7 list? any appreciable change? or are them the same?

You can compare the two lists, but no big change.

[elrules]

Hi Synthex, I have compared both lists.
I only see two signifiant changes:

In 2.4:
5 * 100 Ohm
5 * 100 pF

In 2.7:
4 * 100 Ohm resistors has been replaced by 47k resistors and instead of having atmega ports connected as "4k7,100,4k7,100,4k7,100,4k7,100" they are connected like "47k,47k,47k,47k,4k7,4k7,4k7,4k7".
3 * 100 pF has been replaced by 220pF capacitors.

How do these changes affect the circuit? You found these values worked better? Do you recommend me to use the components from list 2.7, to apply them to my 2.4 PCB¿? Or are they not compatible or not intended to work for the previous PCB design?

Thanks

[Synthex]

Hi Synthex, I have compared both lists.
I only see two signifiant changes:

In 2.4:
5 * 100 Ohm
5 * 100 pF

In 2.7:
4 * 100 Ohm resistors has been replaced by 47k resistors and instead of having atmega ports connected as "4k7,100,4k7,100,4k7,100,4k7,100" they are connected like "47k,47k,47k,47k,4k7,4k7,4k7,4k7".
3 * 100 pF has been replaced by 220pF capacitors.

How do these changes affect the circuit? You found these values worked better? Do you recommend me to use the components from list 2.7, to apply them to my 2.4 PCB¿? Or are they not compatible or not intended to work for the previous PCB design?

Thanks

With the v2.4 circuit, you need to use : "4k7,100,4k7,100,4k7,100,4k7,100".
For capacitors, you can use 100nF or 220nF.

[elrules]

Ok, thanks Synthex.

By the way, it is good to know that your new 2.7 kit is always available (how many kit you have? an entire warehouse? ).

[Synthex]

Ok, thanks Synthex.

By the way, it is good to know that your new 2.7 kit is always available (how many kit you have? an entire warehouse? ).

Yes, new 2.7 kit is always available !!
I still have some pieces available and a new command is in progress.

[ivansc]

Super! I am a brit who lives half the time in Brittany and soon will move there to retire.
Professional musician until 2006 and now hobby studio owner.

At least when I build Megadrum I will have local access to you once I ma in France!
Look out!

Could I send you a cheque in euro drawn on Credit Agricole to order a kit?
If so I would like your address.

Ivan.

[Synthex]

Could I send you a cheque in euro drawn on Credit Agricole to order a kit?

Yes.
Send me a private message with your address.

[SherckoM]

it cost 40-60 € ?
i am interested xD