Core, no connection

Core, no connection Rate Topic:

#1 eptheca

MIDIbox Newbie

Group: Members
Posts: 27
Joined: 26-January 10
LocationNorway

Posted 30 November 2011 - 23:32

I am building a MB64 with modules from SmashTV
I have already built 2 MB SID's so I am familiar with using MIOS studio

I have built the Core, and MIOS Studio can't connect to it.
On the Core I have left out the Bridge rectifier, the "huge" el.cap, C6, voltage regulator, transistor and pots
As I understand these parts are for powering the Core and for the LCD, is this correct?

I am powering the Core from another 5V source, and I am not using a LCD
+5V and Ground connected to the voltage regulator position

I have checked all solder joints, tried with another PIC and another Optocoupler
Checked the MIDI sockets etc.
My MIDI interface and cables works fine with MIOS on my MB SID's

any suggestions?

#2 ilmenator

MIDIbox Guru

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Posts: 1,120
Joined: 01-September 02
LocationTrondheim, Norway

Posted 01 December 2011 - 11:31

Did you connect to the output pad of the voltage regulator? Alternatively, try connecting your 5V power to J2.

#3 eptheca

MIDIbox Newbie

Group: Members
Posts: 27
Joined: 26-January 10
LocationNorway

Posted 01 December 2011 - 12:43

thanks
I have tried that now, but no difference
I have meassured voltage to the 2 places on the PIC and on the Opto, all fine
I can't see how the parts I have left out can affect the MIDI

could it be the crystal?

#4 eptheca

MIDIbox Newbie

Group: Members
Posts: 27
Joined: 26-January 10
LocationNorway

Posted 01 December 2011 - 12:50

DUH!

It was the MIDI connection pins
For some reason I assumed that the pins corresponded to the holes for the MIDI sockets, but it's the opposite

Up and running