Hardware - about hardware useful for the Spectrum: Vicomm Modem.

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VICOMM MODEM 3
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(c) EXPERT

    And now let's talk about the modem
called VICOMM MODEM.This modem is
its design is quite simple and accessible
everyone!;), easy to connect to a computer, and
Of course there is software for it. Home
software: MMD v2.XX-terminal program for
modem VICOMM.
    With her you can do whatever you want
you (copy files, disks from each other
or just "talk" in terminal
mode, the modem dials the number itself, and
detects a call to you, disconnects if
short beeps, etc. are detected, in general
almost complete automation)
 You will have all this if:
 1. There is a phone;
 2.CONNECTED VICOMM to your computer;
 3. Loaded terminal MMD v2.XX

 VICOMM is assembled using the following parts:

 Microchip:
 K561LN2......................1 pc.
 Optocouplers:
 AOT 128......................Zpcs.
 Transistors:
 KTZ15G(B)....................Zpcs.
 KT940A.......................1 pc.
 Relay:
 RES10(RSCh.529.031-04(07,09,19))
 12V...........................1 pc.
 Zener diode:
 KS156A.......................1 pc.
 Diodes:
 KDS21A.......................Chp.
 KDS22A(B)..................bpcs.
 encoders:
 0.22mf......................2pcs.
 1OOmf 16V....................1pcs
 set of resistors............1 pcs.