Recent content by OLIVE2222

  1. Sensors block

    Sensors block

    Hi all, This is an H202/humidity/temperature sensors block I have designed. All componants are located inside the block cavities and are protected from the gas. The PVC block CAO was done with my PCB CAD package by stacking 5 various width PCB exported in STEP format. The board also contains...
  2. OLIVE2222

    Sensors block

    OLIVE2222 submitted a new Showcase Item: Sensors block Read more about this showcase item here...
  3. OLIVE2222

    Why does longer probe cable reduces bandwidth

    It's due to the cable capacitance who is proportional to the length. nice info here: http://circuitslab.case.edu/manuals/Probe_Fundamentals-_Tektronix.pdf
  4. OLIVE2222

    PCB Troubleshooting Help - I/O Board for DDR

    It's OK to set the multimeter in ohms position if you lack the diode test one. The 74HC14 outputs as to be tested with the board powered and with the multimeter in DC position (10 volts or higher) . Sorry to don't mention that before. The pinout of the 74HC14 is visible here...
  5. OLIVE2222

    power plug identification

    looks to be AMP http://www.gopoolandspa.com/Male-Amp-Plug-Housing-4-Pin.html
  6. OLIVE2222

    power plug identification

    Any markings or logo on the connectors?
  7. OLIVE2222

    Resistor & Capacitor Identification

    Sure you right ! thank you Bob for the correction !
  8. OLIVE2222

    List of EDA packages

    Hello Kris! Thanks for adding EDA's to the list. Please find two more here under (to compensate for the two unvalidated ones :)) http://www.bartels.de/bae/bae_en.htm http://www.expresspcb.com/ Olivier
  9. OLIVE2222

    Resistor & Capacitor Identification

    The first one is a 1500 pF safety capacitor The second one is a 2200 pF safety capacitor The third one is (probably) a 27.5Ω resistor. Probably because the fifth black band is no standard. Do you check it with a multimeter? i am almost ready to work at Maplin store ;)
  10. OLIVE2222

    List of EDA packages

    nice resource Kris ! Can you please add: http://www.tsien.info/ (boardmaker) http://www.ni.com/ultiboard/ http://www.abacom-online.de/uk/html/sprint-layout.html http://www.cadcam-group.eu/electronics/software/p-cad/ (PCAD) http://www.rimu.pl/hs/rimuuk.html (RIMU) thanks, Olivier edit...
  11. OLIVE2222

    Fuel Gauge converted to Volt Meter

    here is how to adapt a sensor to a gauge http://www.rst-engr.com/rst/articles/KP88FEB.pdf
  12. OLIVE2222

    PCB Troubleshooting Help - I/O Board for DDR

    The transistors are labeled 2SD2352 on the board but (2S)D2461 are (vertically) mounted on it, so you test it right.
  13. OLIVE2222

    PCB Troubleshooting Help - I/O Board for DDR

    You can have a look at the 74HC14 output (with a multimeter) , pin 2,4,6,8,10 &12 then after the ZJS5101 filters. But if all the outputs of the arrow are out a better bet can be the (2S)D2461 transistor. Being "multi channel" I suggest to use a multimeter in diode test position and to compare...
  14. OLIVE2222

    SPI freezes

    No idea about you code, I don't have C programming skills. However google a bit for "nrf24l01 avr studio" working codes will pop's up. Also if it's your first SPI code get a free sample of a SPI DAC or digital potentiometer so you can "debug with a multimeter" !
  15. OLIVE2222

    Boost converter current calculation

    14.8 for a 12V motor will probably not be a problem, but yes if you have a driver board you can adapt the duty cycle accordingly. Whta's your battery capacity?
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