pcbatterij

Could someone help me out with the questions below: MB9090 board1.jpg: IA: Is this the correct order to connect the encoders with the 74hc165 (see also the INPUT schematics)? MB9090 board2.jpg: IIA: Is it ok to interconnect Ground and power of the DIN and DOUT circuit like I did? IIB: same question as IIA IIC: this is a KiCAD question: I don't know how I can put in the schematic or the board that these are connected through the connectors and wires. I have put a different type of labels in the input schematic than the ones in the output schematic but the result is the same :sad: That's it for now folks :D Cheers Jef MB9090 input v1.21.pdf

Paul, never heard of it yet

cool!!

Hawkeye, Thx. And thank you Thorsten for the .51 version with a dedicated encoder for BPM change!!!!!!!! cheers jef

hey all, Just wanted to share a 3d pic of my MB9090 SeqV4 (Roland 909 clone). :sorcerer: And I would like to thank all of you that have already helped me: thanks :thumbsup: . A few things are not a 100% correct in this 3D pic: 1. The display is not the correct one, it will be a ea dogm display. 2. I don't have a 3d component yet for the BMP display 3. The colour of the switches is wrong, this will be clear/red with a red LED light to illuminate the buttons. 4. I don't have 3D components for the (PEC11) encoders, I just put some knobs in the pic. I almost finished designing the PCB's, and once I have done that I will post the schematics here and on my blog. http://www.bloggen.be/mb9090/ Once I know that the PCB is working, than I'll have to change a few things in the SeqV4 and MIOS32 software: 1. For a the dogm LCD I'll have to change the SEQ_LCD_PrintString commands, mostly in the SEQ_UI...... files. Hopefully with this display (8X21 characters with small font) I'll be able to modify most of the menupages with adding SEQ_LCD_CursorSet(0, 2); SEQ_LCD_PrintString........... SEQ_LCD_CursorSet(0, 3); SEQ_LCD_PrintString......... SEQ_LCD_CursorSet(0, 4); SEQ_LCD_PrintString.... ....... 2. I'll have to add some code to make sure that the encoder next-to the BMP 3X 7segment will always change the BMP, no matter what menu the sequencer is in. 3. I am not using 16 encoders so I will have to change and add code for one encoder to move "left" and "right" to the different fields that can be changed in the current view or menupage on the display. And for the other encoder to be able to change the value of the selected field. Could someone also help me out with the questions below: MB9090 board1.jpg: IA: Is this the correct order to connect the encoders with the 74hc165 (see also the INPUT schematics)? MB9090 board2.jpg: IIA: Is it ok to interconnect Ground and power of the DIN and DOUT circuit like I did? IIB: same question as IIA IIC: this is a KiCAD question: I don't know how I can put in the schematic or the board that these are connected through the connectors and wires. I have put a different type of labels in the input schematic than the ones in the output schematic but the result is the same :sad: That's it for now folks :D Cheers Jef MB9090 input v1.21.pdf MB9090 output v1.21.pdf

Nebula, Thanks for the reply, The schematics isn't finished yet I do need an extra 8 buttons and at least one encoder (for BPM). Thus i need another two SR's for the extra 8 buttons and the encoder(s). I quickly made a different schematic, if this is what you mean with matrixing it down to 2 SR's then I will go forward with this, else I will continue with the classical way. Thanks for all the help Cheers Jef MB9090 Matrix Input v1.2.pdf

Hey all, I am currently designing a sequencer to go in the desktop case of my 9090 project. I am also designing in Kicad so these files could help me a lot. Has anybody found a reason/solution for on of the known problems: seq-cs.* if more than 1 LED is lit per cathode the switches on that cathode don't work. Any assistance on this matter would be much appreciated! :) Cheers Jef

thanks for the replies, I have updated the schematics for the BPM display. The project is still under construction and I would like to use duo-leds for the GP-led's. I have seen Wilba's matrix but don't really know if I can change it for my setup (less buttons, less encoders) and stell get the sequencer running without errors. So I guess I will use two extra SR's instead. Cheers Jef MB9090 output v1.02.pdf

Thanks for the reply jojjelito. concerning the matrix arrangement: I have looked at the DOUT schematics and the DIN schematics of the MB6582. As far as I understood it these two different matrixes are connected to 74HC595's and 74HC165's using transistors?? But as far as I understand it, it is not a scalar because the wiring is completely different (one matrix for buttons and one matrix for led's where in a BLM using a scalar the matrix is one with all the buttons and all the led's). I also looked at Wilba's schematics: I could not find transistors in there?? And I am using less buttons (40 in total) and only one or two encoders. And I am also going to use a BPM 3*7segment led display. I am not experienced enough to change the schematics of Wilba so it fits my design and will still be recognized by the seqV4 software. I would realy like to build a matrix based MBSeq but I am not sure how to do it. cheers, Jef

Hey all, I am designing a seqV4 board for my 9090. I am going to use tactile swithches from OMRON B3F-4000 ( mouser: My link) or E-Switch TL1100F160Q (mouser: My link). In my input schematic on U2 PIN2 I have used (hopefully) the correct component. Would it be possible to check if I have used the correct pins of the switch? I am using KiCAD and have made PIN 2 and PIN 4 of the switch unused. You can of course also check the rest of the schematics :tongue: cheers Jef MB909 input.pdf

Thanks Tk, I am still designing my project with KiCAD (designing for the very first time). I am a complete newbie at electronics and I am using the forum, wiki and ucapps.de as my guide. In attachment you can see how I am planning to use the BPM leds. Once my project is designed and tested I will post the schematics. Cheers MB9090 output sheet.pdf

Hi, I was also planning to build a SeqV4 to fit in my MB9090 project with BPM display. I was going to use the Kingbright BC56-12SRWA from Mouser. This is a three digit display with common cathode. I assumed that the function was still possible in the SeqV4? cheers Jef BC56-12SRWA.pdf

I would love the KiCAD files, thx

hey all, I am trying to build a MB9090 (I still have a few hum problems but I am pushing through with the build). I have finished the 9090 part and I am going to build a MB808-ish sequencer for it. But something puzzles me: how is it possible that the MB808 is working without a AOUT for the velocity of the voices? I have noticed that microlarge uses an AOUT for the voices. Did I miss something, or am I just stupid? I thought I needed the following: core STM32 or LPC17 a few DOUT's for LED's, BPM led's and a 2*16 LCD a few DIN's for the buttons and only two or three encoders AND an AOUT for the CV output. Cheers Jef http://www.bloggen.be/mb9090/

hey all, I am continuing my blog on http://www.bloggen.be/mb9090/ that way everybody can see how it is going with my project. Cheers Jef

Hey all, I have attached the photo how I will set up the transformer. Thanks for the help

Rosch, I'll do some test tomorrow and let you know Jef

I have also added the power supply section of the schematics of the 9090 project. Jef

Rosch, Thx for the reply, I have attached a new file to the above toppic. Maybe this will help you a bit more cheers

Hey all, I have bought a transformer from Reichelt with 2*15V AC. For the 9090 I need to have a 4pin connection with the following values: pin1: 15V Pin2: 0V Pin3: not connected Pin4: 15V You can see in the picture that I only use one output of the transformer (pin 8 and 10, I do not use pin 12 and 14). Can someone tell me if this is correct? Cheers Jef

Hey all, I have seen a few topics about people looking for the tr 909 like buttons. You could use CHERRY MX1A-11NW and look for a nice cap to go with it. Cheers jef

Hey bsilverberg, I can open the link now cheers

Hey bsilverberg, the link doesn't seem to work.... cheers Jef

Thx Olga, great info, super

thx nebula