PSU for single 6581 + AOUT LC

[Sebo]

Hi all:

My name is Sebastian, and I'm from Argentina.

I'm waiting for a Core and SID kits to come.

In the meanwhile I want to build the PSU.

I don't like the idea of use the C64 PSU, mostly because

is big, heavy, and smells (when warms up). And because

I'm planning to ad an AOUT LC to control my Moogerfooger Filter.

In the beggining I planed to use a 7.5+7.5 V transformer, in that

way the Core 7805 gets 7.5 V and the SID 7812 gets 15 V.

But AOUT LC needs +-12 V :(

So I'm going to buy a 15+15 V 1A transformer to power up the

SID and the AOUT LC.

And for the Core my options are to:

1 - Send 15V AC to the Core rectifier and 7805

2 - Send 12V DC (after the 7812 of the SID) to the 7805 of the Core

3 - Use a 7809 to low the voltage before the 7805 of the core

4 - Use a separate 9V 500mA for the core

I'm trying to avoid this last option, but if is the only solution, I will

do it.

What do you think is the best option?

Will I have any advantages if I choose the 3rd?

How problematic the heat inside the box will be?

Do you have any other ideas/solution?

Thank you in advance.

Sebo

[stryd_one]

Hi Sebo welcome aboard :)

I'm not much of an expert on these things at all, but I thought I should let you know that I've heard that regulators in series introduce noise, so those ideas won't work so great :(

[Jaicen]

Is it possible to use a multi-tap transformer? For example a 6 - 0 - 6. That way you can have +12v for the sid and 6v to feed to the regulator. I'd then use a seperate transformer for the filter module. It probably makes a lot of sense to isolate the analogue from the digital power lines anyway.

[Sebo]

stryd_one

Thanks for the quick answer.

So options 2 and 3 are out of consideration.

-----

Is it possible to use a multi-tap transformer? For example a 6 - 0 - 6. That way you can have +12v for the sid and 6v to feed to the regulator. I'd then use a seperate transformer for the filter module. It probably makes a lot of sense to isolate the analogue from the digital power lines anyway.

Thanks for the answer.

May be I was not clear. I need -12, 0 and +12 V to power the AOUT LC, +12 V to power

the SID, and +5 V to power the Core (this last voltage is the problematic one).

The filter is a stomp-box-like module that have it's own PSU, so I don't need to worry

about.

Thanks again

Sebo