Posted By: busy (Slavko Labsky) on 'CZancient'
Title:     Prevodnik TTL-RS232
Date:      Tue Jan 16 07:57:17 1996

           Schema zapojenia konvertoru TTL <=> RS232
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           S diskretnymi suciastkami  (zjednodusena)

                             2k7
                    Ucc-----|===|----*-------> RxD (TTL)
                                     |
                                /~~~~~
  TxD (RS232)      3k3         |     C | KC148
    >-------------|===|--*-----| B     |
                         |     |     E |
                        --      _____/
                  KA262 /           |
                        --           |
                         |           |
                        ~~~         ~~~

  RxD (RS232)               220
    <----------------*-----|===|----Ucc
                     |
                    /~~~~~
                   | C     |     1k0
             KC639 |     B |----|===|-----< TxD (TTL)
                   | E     |
                    _____/
                     |
                    ~~~
  GND (RS232)
    o----------------*--------------------o GND (TTL)
                     |
                    ~~~


           Konveror s integrovanym obvodom MAX232
            (Amaterske Radio AR 10/94 15 strana)

                      Ucc
                       |
                       | 16                Ucc
              1------------------2   +      |
    -----------| C1+         V+ |-----||----*
    |  +      3|                |   10 uF   |
    ----||-----| C1-            |          === 100 nF
      10 uF   4|                |6      +   |
    -----------| C2+         V- |-----||----*
    |  +      5|                |   10 uF   |
    ----||-----| C2-            |          ~~~
      10 uF    |     MAX232     |
             11|                |14
    TTL  ------| T1I        T10 |------  TxD
             10|                |7
            ---| T2I        T20 |---
               |                |
             13|                |12
    RxD  ------| R1I        R10 |------  TTL
              8|                |15
            ---| R2I  GND   R20 |---
               ------------------  
                       | 15
                      ~~~
    (Pre Liane bbs nakreslili Noro & Busy)