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  1. OLIVE2222

    Piezo sensors/ tranducers

    Googling "diy guitar pickup" give many answers. It use very thin wire, so tricky but feasable. Olivier
  2. OLIVE2222

    Piezo sensors/ tranducers

    Hi, if I remember well piezo pick-ups are based on coils which is different from sensors I talks about as they are build with 2 parallel plates. Do you want to build drum or guitar "sensors" ? Olivier
  3. OLIVE2222

    Piezo sensors/ tranducers

    hello, I remember having fun with drums based on a piezo buzzer acting as a sensor. I doubt it can be stereo due to the needed surface too have usable level. By the way I remember the need for a high gain amplifier stage (something in the 10.000 range). have fun, Olivier
  4. OLIVE2222

    SMD Device Marking Code

    Sure, it will help to promote this Californian start up company :D
  5. OLIVE2222

    SMD Device Marking Code

    Steve, misunderstanding on my side. In fact I just Google it. With LAC SOT23 query it's the second result. I find this is better than dedicated tools as it also drill inside datasheets and it's more up to date. But at the end you find more candidates than me ! :) Olivier
  6. OLIVE2222

    SMD Device Marking Code

    HI Steve, here we go! for the RP171N591B http://www.ricoh.com/LSI/product_power/mark/ME-RP171N.pdf and for the XC6219A432MR http://www.armdesigner.com/xsms/html37/uploadfile/20090716144707302.pdf page20 cheers, Olivier
  7. OLIVE2222

    SMD Device Marking Code

    Hi, The RP171N591B as a 5 digits marking. LAC + 2 digit for the lot number The XC6219A432MR as a 4 digits marking.1 L digit marking for the product serie + 2 digits for the voltage + 1 digit for the lot number. cheers, Olivier
  8. OLIVE2222

    Altium PCB editor question

    Hi, Look strange to me. Select and delete the component should work. If you don't care you can send me your .PCB file and I will have a look. Olivier
  9. OLIVE2222

    Beginner Circuit question

    Hi, I redraw the circuit to be closer from the physical project. Note that schematics are not intended at all to be physically representative of the project. I just do it to help your wiring. Everything circled is a component, all black lines are wires (or tracks). When there is only 2...
  10. OLIVE2222

    SMD Device Marking Code

    Hi, looks to be a 2V5 LDO from Analog devices: http://www.analog.com/static/imported-files/data_sheets_obsolete/35145977ADP3308.pdf cheers, Olivier
  11. OLIVE2222

    Wanted: ICs required

    Hello, The 8255 is very popular IC should be available locally or on ebay. http://www.ebay.com/sch/i.html?_nkw=8255&_sacat=0&_odkw=Z0844004&_osacat=0&_trksid=p3286.c0.m270.l1313 The Z0844004 is available on Ebay...
  12. OLIVE2222

    RS232 addressing

    Hi, As RS232 is not intended to be chained you need to work on hardware side too. here under a link to such an application: http://www.weedtech.com/an100.pdf having a µC with 2 UARTS (like the ATMEGA644P) will also be a solution cheers, Olivier
  13. OLIVE2222

    FT700 Packard Bell LCD PC monitor repair

    Hi all, here my first post on this forum. Answer to this closed thread: https://www.electronicspoint.com/packard-bell-ft700-monitor-t107830.html I fix the same issue as follow: replace C809 an C811, electrolytic caps 330µF and 680µF both 16V on supply board. I use one 390µF and...
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