MB6582 PSU

MIDIbox SID
1

As my MB6582 is nearing completion, i need to start building a decent PSU.

At first i thought about using Northernligthx design but there are some flaws. I spoke to him and he told me his design isn’t working well at the moment.

So i decided to make my own design taking his as inspiration. I want to use a 2 x 12V Transformer:

On another electronics forum i was warned about latch-up. So i want to change the design and add a latchup protection. It’s supposed to be done by adding some diodes. But i am not sure how.

So i would be helped if anybody could tell me how.

2

it consists to have diode (1n400x) at the output of the 78xx to avoid reverse voltage

http://sdiy.de/de/projects/miniPSU.html

basically the same idea

3

Thanks, i actually figured it out when i was looking at the schematics for a Roland Juno 60. Roland also used it in their PSU design.

4

Thanks, i actually figured it out when i was looking at the schematics for a Roland Juno 60. Roland also used it in their PSU design.

Did you get this working? What components did you use in the end? Cap sizes, transformer power, rectifiers and regulators?

5

No, i haven’t build it. I decided against it actually. The two big resistors are basically giving off 12W of heat under full use. Since i am not going to be using 6581 SIDS, i wont need 12 Volts.

So i decided i might as well use a C64-II PSU. I did almost do it though but then the resistor were out of stock at Reichelt.