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Recent content by sensor_ua

  1. S

    Signals timing in IR remote control and cell phones

    InfraRed with MCU http://en.wikipedia.org/wiki/OBEX http://www.hpl.hp.com/personal/Jean_Tourrilhes/IrDA/Java.html
  2. S

    compatibile with 8251

    I use (start 1997) uPD71051L - PLCC28 (NEC) - replacement 82C51 - CMOS Info - MSM82C51A (OKI)
  3. S

    How to design 12v to 3.6v Converter but with 2A current.

    convertisseur 3.6v 12v TPS5430 www.ti.com LM2679 www.national.com MIC4576 www.micrel.com
  4. S

    How to isolate a HART modem circuit from the 4-20 mA loops?

    HART I use transformer EMIT1200 or SM-LP5001 plus capacitor 0.47 uF - connect parallel of HART-line wires. For uncharge meet the resistor (100 kOm) after capacitor.
  5. S

    HT9200B DTMF generator INTERFACING TO TELEPHONE LINE

    hardware dtmf generator PNP - 2N5401, NPN - 2N5551
  6. S

    C code of RTC(external crystal) for LPC2138

    LPC2138-RTC look to **broken link removed**
  7. S

    Low Power Battery Development Issues

    Crystal type must be choise by DataSheet of microcontroller. Capacitors must be set as crystal recommend. Oscillator may be run if capacity wrong but not haved a stability of frequency.
  8. S

    universal interface converter

    IMHO, LPC2103 look to. www.nxp.com. 2 UART and USB-slave built-in.
  9. S

    how to interface 128k parallel ram using 16 address lines

    Look to hardware the www.ethernut.de
  10. S

    Difference between SIM 100S and SIM 300S

    Still in SIM300 are not presents the System Reset pin and Analog Ref In pin, 10kOhm resistor for backup built-in
  11. S

    Standalone telephone dialer for burglar alarm

    telephone dialer ic Please - **broken link removed**
  12. S

    How to run Windows applications on Linux?

    Windows applications I use VMWare Workstation (on SuSE 10.1)
  13. S

    USB to RS232 Convertors Specs

    USB Power-line is 5V. Use the ICM7660 (MAX660 etc) - capacitance voltage converter
  14. S

    DTMF from telephone line to RS232 (PC port)

    dtmf to rs232 decoder I know DTMF decoder with serial interface but not RS232 - MT3170 from Zarlink (old Mitel) **broken link removed**
  15. S

    Help me with designing a circuit for Caller ID

    a circuit for caller id FX614 from CML Micro - BELL202 modem - and microcontroller IC?
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