Shuriken

Yeah a 12V Transformer is cutting it very close (12V * 1.4 - 1.4 = 15,4V Rectified) That's almost exactly the 3 Volts the regulator needs to properly regulate. And that calculation doesn't take into account small fluctuations and deviations. My home power is not 230V but about 222V, the transformer output will also be slightly less. So a 15VAC transformer is what i use for a 12V linear regulator.

If you have a dual secundairy transformer, making a fake centertap is not a good idea. It is better, as you said, to use two bridge rectifiers. The schematic on the wiki isn't great. First off all the LM79xx series need a bit of load (10mA) to regulate. Most schematics use a led with a 1k resistor. And it is best practice to put 2 diodes in for polarity protection. For example: The article on the wiki is probably in need of an update. nILS made a modular PSU where he did use diodes.

Probably best to start a new one and then post your original schematic.

Nice wicked1. I have all the components for a switching 6582 psu. Bought the lm22676 and lm22675. But havent gotten around to get some pcb made yet.

Good to hear you got it working. And also nice to see my Core32 is put to use :wink:

What pic are you using the 18F452 or the 18F4685? and are you using the correct firmware for that pic?

Core and OPL3 should work. Without bankstick you should have 1 patch.

An UTP connector is supposed to stick out, otherwise it is hard to get the connector out.

A bit rusty. Maybe this wakeup call is just what it needs :wink:

** Taking into account that nILS is going to blame me for raising this topic from the dead :wink: ** I have a project (303-ish) which could really benefit from a small sequencer (a SEQ4L is too big tbh). Any chance this will release?

You don't have to use seppoman's SDCARD pcb for this. If you search for "arduino sd card" on ebay, You can find ready made ones. And looking for "stm32 ethernet" should give you the other one.

Tim, thanks for all your efforts supporting this community. It is much appreciated. I cannot help feel this was a forced move and not entirely your own choice. I read a couple of your responses on this. I can imagine this has been a rather frustrating undertaking. Having 100+ people on the waiting list. Lot's of people not responding....Meanwhile not wanting to gamble your life savings on this.

What does the datasheet tell you? :whistle:

Maybe it can be done with a stepup dc-dc converter. But it would be complex.

I had a look but can't find any older versions. I have version 1.1 in my personal download archive. But i don't think that would go well with the Sammichfm.

These links are from the old forum software. They don't work anymore. The posts are still there. Maybe you can find it with the Search option. Also there is a great from Hawkeye which might be helpfull for you.

Why don't you have a look at the schematic of the Core32 (STM32 based)? Midi Out looks the same to me.

I have two STM32 based Cores laying around. One is almost completely build. The other one is in unopened antistatic packaging as received from smash. Let me know if you are interested.

Oh yeah, good one. I forgot about that site. P.S. the title should say: Decent 19inch case :wink: