Reg Office: Pointer Farm, Great North Road, South Milford, LEEDS LS25 5LH United Kingdom
Reg Number: 4222329 Tel 01977 683665 Fax 01977 681465 www.milinst.com
To record directly from an audio source (eg sound-card/tape-recorder etc), set the Input jumper to
the Line position. The input sensitivity is 1V p-p.
The operating mode of the ISD1760 chip is such that all messages have to be recorded
consecutively during the same session. It is not possible to edit one message on its own-all
messages must be re-recorded if one message needs to be changed.
Place the
MODE
jumper in the
Rec
position to enter record Mode.
Note that this action will
automatically erase all prior recorded items from the chip.
Press any of the message buttons (or place a shorting lead between the pin pairs) and hold down
whilst speaking into the microphone. The red LED will light and the card will continue to record while
the button is pressed. At the end of the first message, release the button.
To record the second message, press any message button again and speak into the microphone.
Releasing the message button suspends recording.
Continue as above until up to 8 messages have been recorded or the length of the messages
exceeds the total recording time.
Upon completion of a recording session, move the Mode jumper back to the Playback position and
then power down the board- this will automatically store the message start points on the chip-
failure to do this will give strange results!
Play-back
There are 3 playback modes available depending on jumper positions at power-up:
Normal mode- message select mode (No jumpers on either pin pair 7 or 8)
Set the Volume control to mid-way.
Ensure the Mode switch is set to Playback.
Press the "Message 1" Button; the green LED will light and message 1 should be heard from the
speaker.
Once message 1 has finished, the card will wait for further messages to be selected.
Message buttons pressed whilst a message is being replayed will be disregarded.
Adjust the volume control to provide the required audio output level- you will probably find the
output from the included amplifier is sufficient for most exhibitions/rooms.
Sequential Playback Mode
Place a jumper over pin pair 7- this action is read at power up and will put the board into
sequential message mode until the board is powered down again.
Power up the board. Shorting pin pair 1 will play message 1. Shorting pin pair 1 again at the end of
message 1 will play message 2. Subsequent messages are similarly played returning to message 1
after the last message has been played.
Random Message Playback mode
Place a jumper over pin pair 8- this action is read at power up and will put the board into random
message play until powered down again.
Power up the board. Shorting pin pair 1 will cause the playback of one of the recorded messages
in a pseudo-random manner.
