Janis1279

Hi, Are you compared the both LCD screens pinouts in the corresponding data sheets? It's possibly are different. Regards, Janis

Hi, MIDIbox FM Demo Samples part included some non working links. one of it (Schematic from Rick Jansen) is possible to restore with the updated link https://janswaal.home.xs4all.nl/Emusic/Moog/, I think. Regards, Janis

Hi, - I do not know how you are planning to organize cooling inside yours MB-6582 case. When you are using a single 12V power supply you will get a lot of heat from a +5V linear stabilizer ic inside the SID synth case. - Some about feedback pots from one of Hawkeye messages: "1. 100kohm work fine, 500kohm will also work... the value just specifies the max feedback "dampening" which is at maximum for 100kohms already. 2. you need four "stereo" feedback potentiometers for four stereo pairs of SIDs, no matter what type of sids." or otherwise you don't forget to grounded an analog inputs. Regards, Janis

Hi, as you see it's some info from Wibas mb6582 building files. At first you can print it for the better understanding for the matrix structure, I think. http://wiki.midibox.org/lib/exe/fetch.php?media=mb-6582:mb-6582_cs_dout_wiring.pdf http://wiki.midibox.org/lib/exe/fetch.php?media=mb-6582:mb-6582_cs_din_wiring.pdf When I built my MB sid custom CS, it helps a lot. Regards, Janis

May be you can check all signal diodes 1N4148 are right polarity oriented .

Hi, Here is a default encoder assignments for MB6582: http://www.midibox.org/dokuwiki/doku.php?id=default_encoder_assignments On the shift registers appropriate pins you can check pulses, when you slowly turn encoders knob. ps. some encoders have a different pinout, if yours are from another manufacturer. "Patience is a virtue" Regards, Janis

Hi, The resistor networks are possible simply measure with the multimeter. If it not proper pinout , you are able to solder ones very fast from the separate resistors. Regards, Janis

Hi, May be you need to recheck the soldering again, not for bridges only. The Led's and buttons are controlled by shift registers. To check all the ic's for right direction installed, for no broken ic pins and for it are in the sockets in right places. Regards, Janis

Hi, The simplest way is to check interesting connection points on the pcbs with the multimeter with a beeper. Thenafter with the power on to check all voltages on the supply rails on the pcbs. Regards, Janis

Hi, May be the 9vac wallwart is too weak. The Sids are eating a lot . Which Sids and how many are installed ? Regards, Janis

hi, The DINX4 and DOUTX4 modules are always connected to the Core module ports. On the complete MB6852 base board these chips are located near long connectors row at the edge of board. Regards Janis

Hi, In the wiki pages you can read some more control surface troubleshooting info http://wiki.midibox.org/doku.php?id=control_surface_troubleshooting&s[]=mb6582 The standard control surface has a PLAY button and it will be useful in farthest tests, with uploaded patches. For that the JD5 and JD8 slots are with the i-cs, of course. Good luck! Janis

Hi, Thorsten, many Thanks! Let's think forth. Best Regards, Janis

Hi, With the Pic based core tested midi in with some keyboard keys: Keyboard keys originaly are grounded , tried to make logical OR, diode is signal diode, as 1N4148. An idea using the optocouplers is from Doepfer the Solina midification pdf example. With the 60 keys will be 60 gates signals, it's paraphonic musical instrument.

Hi, I have a soviet pseudo-polyphonic almost analog strings-musical instrument Opus.It sounds great. Interested to midify it, but not sure which way to go? For controlling the filter or some of the filters I need to build MBCV,I think. But this way isn't useful to midify the keyboard's 5 octave keys .That I understand from some readings.May I need to merge 2 pieces PIC18...based cores: the MBCV and the Midio 128 for that?Whereas with the newest LPC based core I'm not sure in my possibilities to make a right software part for that. Can any knowledgeable to give some more advice? Regards, Janis

Hi Kike, Are the Sid chips audio input pins 26 tied to ground (with the small jumpers)? Regards, Janis

Hi Kike, For the basic Sid part schematic understanding it's a good habit to use a MBHP_SID_V3 schematic from the Sid Module section. It can help to understand the audio path part and the control pin part of the Sid chip. The schematic is the same, I think. There are a lot of soldered wires - jumpers on the Twinsid main board. If you are used the same layout board you need to check a presence of every jumper - wire , under the ic's, too. Visually check all solder places on the pcb, not the shorts between the traces,too. To check a non solderable jumpers too. Supply voltages tests idea are similar to the sammichSID_build_guide_v1_0.zip from page 18, but there are another components layout of course. To check: right supply voltages for your sids , the right nominal similar capacitors for the sids oscillators on the sid pins1/2 and 3/4. Regards, Janis

Hi, Power supply option B is a right option for two different type of the sids. regards, Janis

Hi, For the 8580 you need to use one 7809 and for the 6581 you need to use one 7812. The inputs of both voltage regulators are connected together to +14VDC rail. It is possible to use the common heat sink, as ground pins of the regulators are connected together, too. Regards, Janis

Hi, Will be fine 12VDC 1A. Wilba said: If using 8580, a regulated 12V power supply is preferred but not essential. Regards, Janis

Hi, Are you testing another FM soft with your Core module, too, not sammichFM soft only ? May be I am not right. Long time ago I had similar no sound event. Regards, Janis

Hi, There are a lot of inductors ( coils ) you can find on an old computer motherbord. Regards, Janis

Hi, Another simple noise gate schematic - LPM-23 1 channel I been made on a breadboard and tested with the MB6582 with 4x 6581, too. http://hammer.ampage.org/files/LPM-23-NoiseGate.PDF More detailed info about components you can find in Mark Hammer posts in this forum http://www.diystompboxes.com/smfforum/index.php?topic=81918.0 - In the schematic an OP amp pins 3 and 12 are need to be connected to a +5V chain. It's according to a pcb layout. Regards, Janis LPM-23-NoiseGate.PDF

Hi, Possibly too small output current. In the project startup phase browsing forums is a better way to collect info what you need. Regards, Janis