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| Note : The ISD-2560 is getting rare... Winbond dont make them no
more... |
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| Powerpoint
presentation of the project on april 22th 2008 :
Voice Keyer (6.2 meg) |
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| I'd like to offer
many thanks to André VE2FAB who wrote this Pic program and
drew the schematics. |
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| This project, the
Voice Keyer or voice repeater is controlled by a
microcontroler the Pic 16F468A, it records your voice in a ISD
and sends it back on the air as a message. For this
project I used the ISD-2590 microcontrolor which can record up
to 90 seconds. The ISD-2560 and ISD-2590 (60 et 75
seconds) are also available. |
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During a
H.F. contest it is often necessary to repeat the same
information for example
"CQ CQ CQ contest de VE2HLS". The Pic 16F6484A gives you
the possibility to record 1, 2 or 3 different messages for a
total of 90 seconds. The messages lengths can be
adjusted to your needs. |
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| Operating the Voice
Keyer : |
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| Recording mode (green LED): |
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| Place the play/record
switch in record mode. Push the PTT of your microphone
and record message #1, release the PTT, push the PTT again and
record message #2. Same sequence for #3. At he end
of the third message the grenn LED will flash. If you don't
like one of your messages, you'll have to start over and
record them again. Never forget the 90 seconds limit of
the ISD-2590. |
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| Sending a message (red LED): |
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| Slide the play/record switch
to play mode. Push button #1 and this message will be
aired. Same sequence for #2 and #3. |
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| Message #1 repeat
mode : |
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You have the option of two delay modes for message #1
With the play/record switch in play mode;
First for around a two second delay, press button #1 and button #2
Second delay around 4 seconds, press button #1 and button #3 |
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| To exit the repeat
mode press the PTT. |
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| Note : In the repeat
mode both LED's go on. |
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