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PCB DESIGN - Digital with USB and Analog

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PCB DESIGN - Digital with USB and Analog

Postby Synthex » Sun Dec 16, 2007 5:41 pm

Here is my last Digital PCB design :D

On the board :
- True USB with 18F2550
- Pot to adjust the LCD contrast
- KeyBoard diodes
- MIDI activity Led

All in a smaller space !!! :)

THIS DESIGN IS DEPRECATED http://www.megadrum.info/forums/viewtopic.php?f=3&t=108&start=0
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Re: NEW Digital and Analog PCB Design

Postby Synthex » Sun Dec 16, 2007 5:45 pm

And With it, my new analog PCB with 32 inputs. :D

THIS DESIGN IS DEPRECATED http://www.megadrum.info/forums/viewtopic.php?f=3&t=108&start=0
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Re: NEW Digital and Analog PCB Design

Postby dmitri » Sun Dec 16, 2007 6:08 pm

Great job! Maybe worth throwing in a few more decoupling capacitors and placing them closer to power pins of ICs?
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Re: NEW Digital and Analog PCB Design

Postby Synthex » Sun Dec 16, 2007 6:27 pm

dmitri wrote:Great job! Maybe worth throwing in a few more decoupling capacitors and placing them closer to power pins of ICs?

For this type of circuit is quite sufficient.
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Re: NEW Digital and Analog PCB Design

Postby Tyrell » Sun Dec 16, 2007 6:36 pm

hello all!
Maybe a estupid question, but, are the diodes inside the 74s1053 compatible with the bat 85? is there no problem?
Thanks.
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Re: NEW Digital and Analog PCB Design

Postby Synthex » Sun Dec 16, 2007 6:41 pm

Tyrell wrote:hello all!
Maybe a estupid question, but, are the diodes inside the 74s1053 compatible with the bat 85? is there no problem?
Thanks.

The 74s1053 consists of a 16-bit high-speed Schottky diode array suitable for clamping to VCC and GND.
Exactly what we do with Schottky diode bat85 !
Then no problem ;)
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Re: NEW Digital and Analog PCB Design

Postby cadman97 » Sun Dec 16, 2007 6:43 pm

synthex, Do you think the updates that Dmietri are doing for the 32 input will work with your very effiecient design? or have you gotten this working already? Just wondering.
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Re: NEW Digital and Analog PCB Design

Postby Synthex » Sun Dec 16, 2007 6:50 pm

cadman97 wrote:synthex, Do you think the updates that Dmietri are doing for the 32 input will work with your very effiecient design? or have you gotten this working already? Just wondering.

It's already working ! ;)
I have already achieved the 32 inputs.
Dmitri should publish soon the firmware for 32 inputs version ...
Last edited by Synthex on Sun Dec 16, 2007 6:52 pm, edited 1 time in total.
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Re: NEW Digital and Analog PCB Design

Postby cadman97 » Sun Dec 16, 2007 6:52 pm

Very cool, All my questions for now are answered. Off to the store I go. :)

Just verifing the new parts list I am creating.

Hopefully Dmitri will have a christmas present for us :) I'm building this for my son.
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Re: NEW Digital and Analog PCB Design

Postby Tyrell » Sun Dec 16, 2007 11:21 pm

Ok, i see but clamp what range? Same as bat85 (30v i guess)? dont matter?
Sorry my english...
Thanks :)
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