polpat

Just received my 5 chips just yesterday! Thank you! Looking for info on different chip manufacturers version... The joke: I guess probably Microchip made this "noiseless" version for Dolby industry... ;D

Hi dioioib, here is something for you.... http://www.alliedelec.com/Search/ProductDetail.aspx?SKU=508-2674&MPN=PT-10-000-K&R=508-2674&SEARCH=508-2674&DESC=PT-10-000-K?utm_source=Allied&utm_medium=merchandising&utm_campaign=Allied_Top_Sellers&utm_content=508-2674 For non italian people I suggest to browse the rs components worldwide webpage and find a local partner of it http://www.rs-components.com/index.html Unfortunately shipment outside Italy of items like pactec pt-10 seems to be not cheap. Greets, Polpat

Hi there, you can find at a reasonable price (22,54 eur) also from rs here in Italy (I think the same for rs international). Here is the url http://it.rs-online.com/web/search/searchBrowseAction.html?method=searchProducts&searchTerm=2508440585&x=22&y=22 otherwise you can search for rs code 2508440585 I hope to be helpful for someone. Cheers, Pat

Paid...and of course... Where are my chips???! :P

Hi to all. At the end, after a lot of time, work and layout revisions I am going to finish my step sequencer. The "hardware" side of this magic box, I mean electronics, cable connections, pcb placement etc etc, is slightly finished and at today only the placement of custom made lighted buttons and frontpanel cover (my economic solution I have still in the design phase) are left. I will do this in the next days (I hope not weeks ;) ) The panel layout is based on the Sequoia V2 seq version from Sasha: I tried many layout solutions and buttons placement and at the end I reached a similar one but I think this is the best layout that can be done. Details about my implementation of this step seq are the common seq V3 specs plus: * Enhanced buttons/led panel: Group Select Button 1/2/3/4, Trigger Layer A/B/C, Step View. * Complete 4 x 16 matrix duoled button surface. * 2 Midi IN, 4 Midi OUT, 1 Din Sync. * BPM display indicator. Only CV Output section is missing, but for now I don't mind about it....my Prophet 5 and Doepfer A100 are midi ;-) Later I will describe better all the difficulties during the build process and solutions adopted day by day and shortly of course I will put pictures of all this works....see you soon guys: below you can see current status of the box. Pat DSCN2185.JPG

I add my request to the queue: 1 Baseboard kit (without PIC's) + 1 Control Surface kit. And of course...thank you a lot to TK, Smash and Wilba for all this! Cheers Pat

Hi Mike have you received my pm with my email?

Uops...it seems I had been a little bit late.... :-( Nevermind...will you have occasion to catch others sids in the future? Thank you! Pat

I could be interested too...if Jack is not interested I put me on the queue. Can you send some photos of the boxes? Pat

Hi majjam, I am interested in some of these sids, are they available at the time? In case what is last price? Pat

Hi to all here!! Just sent an email to Wilba and placed and order for 2 base + 2 surface pcbs... Pat

Hi all, thank you doc also for your comments about my problem. I have some news about my problem....a good news..probably I have solved! Or better... I suppose to have solved it, I go to explain why ;) Today I did some measurement: I used my bank power supply (this time a serious one!), a handy tester to measure current and of course my seq. I fixed the voltage to 9VDC (yes not AC as before), I passed through the tester and voilà : 380mA for 1 core, 3 and 1/4 DIN, 2 and 1/2 DOUT, 8 chips bankstick, 64 duoleds for the 4 tracks matrix, 16 leds for steps and 16 leds for other and only 1 2x40 LCD backlighted. As TK said the duoled are multiplexed, so the total for 370-380 mA is absolutely reasonable (with one lcd connected). I played for 20/30 minutes and it was all right, no problems about current nor system off or what else. This time the only difference was the power supply: it furnished 9V DC not AC. I am seriously thinking there is some problem with the bridge (may be defective or broken) in the core or the two wall adapters I used before were not so good as I thought. I looked at the bridge and the code (if I remember correctly) is W06G, I suppose it's a 600mA type, I don't have the datasheet to verify. The important thing however is the seq is now working! Next step is to buy a DC wall adapter 9VDC, 1A and make the final try. I could also remove the bridge but the core is fixed on the panel and digging on wires, so I don't want to disturb it :-) Tomorrow I will connect the 2nd LCD and I will check again the current. Thank you again to all for your help! Greetings, Pat

Hi Thorsten, hi ris8_allo_zen0, thank you so much for your comments! Thank you Thorsten for your exact current measurement, I tought more than 1A was too much for a system like that, 1A is a lot of current when we speak of digital.... My next move will be to resume my power supply bench (actually I don't use too much, but in that cases is really useful), my DMM and give a check for current driven in the system searching for some short circuit, also if I don't believe the problem is a short circuit (or...I won't to believe, after you will see pictures I will understand why.... :-) ). The strange thing is that the seq is definitely ok: circuits works properly, bankstick loads, the only display connected for test respond well with a good backlighting, all leds toggle properly...the only trouble is that after some minutes the seq goes down. Really confused about this! But ok, I will measure current and only after I will make suppositions about the problem. Bye... Pat

Currently I'm building a non-expanded Seq. The only problem I'm having now is to find the knobs. Tried at ALBS but my order is below their minimum :(

...sempre in inglese, è utile condividere con tutti! Hi all! Thank you for your prompt reply and your effort to help me! Well... eh eh...the reason why I used a 12V PSU after the first blown supply it's because it was the only one left! :-) I've downloaded the datasheet of the bicolor leds I purchased from ebay (here is the link, may be for someone is useful http://cgi.ebay.it/ws/eBayISAPI.dll?ViewItem&item=170099552887&sspagename=ADME:L:RTQ:IT:1). Every led drive 20mA, so the calculation (if I'm not wrong) is pretty easy: 2 * 10^-2 * 64 = 1.28 A (not including circuits and display). That's why my PSU are dead, I suppose... :-( Now I think I have 2 possibilities: the first is a 2A power supply (or to be more safe, 2.5A) and change the 7805 with an adequate current consumption type (then more heat to dissipate and greater dissipator to use); the second is to use a single trafo 9+9V (1.5A each line) and build a PSU around it. This last solution would let me to drive separately the circuits: one line is for core, dins, dout and lcds, the other is for leds. In that way we have have less total current running in each regulator consequently less heat to dissipate. Of course, the bad part is that I will have to build 2 circuit with upgraded 1.5A version of 7805 power regulator (and change the values for resistors and cons in that part of the circuit) to regulate things correctly and bypass this part of circuit in the core. What do you think about? Is this idea too much to reach a simple result? Thank you for your comments. Cheers, Polpat P.s. Are you building an expanded seq like mine? If you need help (for what can I do) I am here.