Midibox sid PSU

MIDIbox SID
1

So I just got my 2 pcbs for my midibox sid from modular addict the core8 and the SID module  and now I need to start getting all the parts together .

The part I am wondering about is the PSU, I heard that there are like 3 - 4 options for the PSU one of them is using one from a c64 but I don’t have one available as it is in use so that is not an option for me.

I want to be able to use 1 PSU for both the core and SID modules but apparently the 7805 voltage regulator can get hot is there a way to manage this / is this going to be a problem?

I am using an 8580 SID btw so PSU recommendations would be appreciated.

2

SID Modules with 8580 must be supplied in 9V! Not 5V
PSU is on the diagram:
http://ucapps.de/mbhp/mbhp_sid_v3.pdf

Best
Bruno

3

just to clarify because I am about to order parts and I am being my paranoid that I am overlooking something self  I should be looking for a 12V 500ma DC adapter or was it 15V ?

4

It depends, for a 7809 regulator a 12V input is enough, check the datasheet of regulator you choose. but in general:

 

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5

is this for the Sid or the core because I have a 7805 for the core and a 7809 for the Sid module 

because i am trying to run the sid module off of the core using only one power adapter 

6

You can use 12V input for both 7805 and 7809(same external adapter), the column title is Min imum Input Voltage.

7

made a mistake

8

7V is not a big drop for a 7805(not too much hot) and you can reduce it to 4V by supplying the 7805 by the 7809. I prefer Linear regulation for Audio purpose but I’m a purist for sure :wink:

9

made a mistake

10

Maybe better for him to start from beginning, to understand common regulator before trying a more complex option. He just has some SID modules and a core8 classic mbhp, not a MB6582 pcb, it’s less power too. It will work correct if he follow the basics. After that first thing achieved, he is free to investigate more and dig in your solution to optimize his already working synth.

11

Ah, you’re absolutely right, I missed that it was just a single core module and SID module. They mentioned multiple PSU options and my mind immediately went to the option a, option b, option c, etc from the Mb-6582 documentation. 7805 will work fine then, lol. The MB-6582 is a current hog but a single SID is pretty manageable.

The switching regulator isn’t any more complex though—it’s a drop in replacement—but it’s *way* more expensive and not at all necessary for a small SID synth.

Pay me no mind, I’ll back out :wink:

12

ya one SID module to start might add another one later for stereo 

and ya i am pretty much a newbi 

so to clear it up I have the 7805 on the core and on the sid module I have the 7809 instead of a 78L12 because I am using the 8580 and I can power this through the one dc adapter running 12v DC 500ma sound right ?

13

4 hours ago, goofyfirehydrant said:

so to clear it up I have the 7805 on the core and on the sid module I have the 7809 instead of a 78L12 because I am using the 8580 and I can power this through the one dc adapter running 12v DC 500ma sound right ?

You got it! :wink: