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Recent content by pool_77

  1. P

    which pcb cnc milling should i go for ?

    How do you do vias (plated through-holes)? Thanks, Pool
  2. P

    LPKF proconduct paste experience

    What experience do you have with LPKF Proconduct Through-Hole Plating? I heard that there are mechanical problems if board is arched e.g. when FASTON connectors are used. Then vias loose connection. I want to use 16-23mil (0,4-0,6mm) vias. Is it possible to use a wave soldering with this vias...
  3. P

    Which one has more functions: Kicad or Designspark?

    What is better in functions and more perspective? Thanks
  4. P

    How to measure pAmp current?

    Check internet, eg. https://focus.ti.com/lit/an/slyt204/slyt204.pdf
  5. P

    High Q cored inductors?

    To reach high Q on 500kHz you need to use ferrite or better ferrite-iron core. Check e.g. for EPCOS products. Pool
  6. P

    How to measure pAmp current?

    Use any variant of chopper amplifier.
  7. P

    Metal film vs metal oxide resistor?

    Inductance do not depends on a type. It depends on the process how the resistance is created. If it is spiral (helix) then inductance is higher than it is cuted as meander. Pulse robustness depends on maximal voltage of the resitors. On the other hand I have better experience with metal...
  8. P

    220Vac to 5vCC without transformer

    220vac voltage divider also: elector 2004/12 with IRF730 elector 2005/7-8 page 77 IRF730 (current source with zener diode) Radio 1999/11 parallel stabiliser with capacitor 5-46V (2 transistors pool
  9. P

    Sony ICF-SW100 manual or schema

    sony icf-sw100 manual I am looking for schematic or service manual for this RX. (I have only user manual) Thanks pool
  10. P

    Laser diode driver - help or information needed

    Re: Laser diode driver use IC they have feedback to eliminate temp.... or two diode element (there is second used for feedback)
  11. P

    Where can I find chips for voice over IP project?

    Re: voic over ip chips ? Easier start is with Centrality PA1688 Nearly all source is available. Cheap solution Many designs is also on PSB21553 from infineon Pool_77
  12. P

    isolated sound card interface

    I am looking for schematic as for isolated input and isolated output for audio measuring by PC sound card. Thanks pool_77
  13. P

    ARM 7+SA1110 project ideas

    323 is dead by my opinion, do not waste time implement SIP or MGCP or IAX2
  14. P

    Do you use auto-route for PCB layout packages?

    Re: Do you auto-route? I use autorouter with low rules, to check good components placement pool
  15. P

    Schematic of Philips 22DC8709/23B radio from BMW

    I am looking for a schematis of Philips 22DC8709/23B GPS radio from BMW car. Thanks for any info. regards, pool_77

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