benuron

two sets for this table please! :D

Yes, my calculations are without load. I made an order of one transformer with 30va and 2x12v, when it arrives I will experiment. And here are some pictures with the core running the midimon app and the opl3 module :)

Found a site with the answer http://www.kpsec.freeuk.com/powersup.htm#smoothing If I use a 12v transformer... The main voltage in my house is 240v so the voltage in the secundary side of transformer would be 12,52v, after the full wave rectifier 11,12v (1,4v loss) and after the smoothing 15,57v good for the 12v regulators, right?

So there is a voltage drop... Sit a bit confused! Where that 10,8v * 1,41 comes from?

Ok! I've finished the core and opl3 module, moving to the constrution of the psu. I've more questions... :unsure: On the NorthernLightX schematic after the rectifier, the voltage increase but in the wiki page about bipolar supply's it says that the voltage drops. Anyone can explain? How much is the power consumption of a full midibox FM? :)

Thanks! I will use that 15-0-15v transformer. To power the core module I already have an 9v wall wart supply. :) But...I have more questions!sorry :P I do the math and the capacitor size is 1410uF so I will use a 2200uF, right? Any rectifier will do the job?Do I have to had precautions in which I should pick? What fuse to pick?Fast/slow blow?current?

Thnaks for the reply's ;) I will use Center Tap Transformer method http://www.midibox.org/dokuwiki/doku.php?id=bipolar_12v_psu I have some doubts in what transformer should I buy... This one is 15-0-15v 0.3A http://www.leiritronica.com/electronica/product_info.php?cPath=7_8&products_id=41297 This is 15-0-15v 1A http://www.leiritronica.com/electronica/product_info.php?cPath=7_8&products_id=41299 Or a toroidal transformer of 80 VA 2 x 24 V / 2 x 1,67 A http://www.aquarionet.com/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=9838&category_id=139&option=com_virtuemart&Itemid=71 Which one is the best to power the opl3 module and maybe later the AOUT module? :)

Can I use a atx power supply to power the op amps of the opl3 module? It will create some kind of noise in audio signal? ??? It was the -12/+12v or the -5/+5v...

Mais um de Portugal! :D Neste momento estou a montar o modulo de usb GM5 e a seguir vou construir o core mais o opl3, neste momento falta-me os pcb's. Acho que primeiro deves ver que layout se adequa melhor as tuas necessidades (nºs de pistas que costumas usar,send's/return's, botões, leds...) Para todos os projectos tens de ter um modulo obrigatório que é o core(núcleo, processador), os outros módulos servem para ligares os potenciómetros, encoders, botões... ao core. Assim por alto o módulo DIN (digital in) serve para tudo o que comunica com o core com 0's e 1's como os encoders e os botões e o AIN (analogue in) para os faders, pots. Eu ja sigo este projecto há alguns anos e só agora é que estou a meter a mão na massa. Não é um projecto que se compreenda rapidamente! :)

Ohhh thanks! I don't understand nothing about the technical stuff, only following schematics and soldering! :)

I got mine some days ago ;) I have some doubts... Can I replace the 6n138 by the 6n139?And the c3 1uF ceramic capacitor by one 1uF film capacitor? Thanks

Ok, that was my concern because you can edit the bulk without beeing registered. In that case you wouldn't have a way to contact. So, I will edit an wait for the reach of 250. ;)

To place an order I only have to edit the url with the names?How do you contact me then?