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GSK-118
80 Second Voice Recorder
w/ 5 watt Amplifier
INTRODUCTION
This pre-assembled circuit is a very adaptable digital audio recorder that comes with a
built in amplifier. It can select between an internal MIC or an external source for
recording. This circuit can also be connected to a PIR or other external sensor to create
an automated response for specific situations.
CIRCUIT DESCRIPTION
Match the components to the following locations on the PCB
•
±5V for power supply
•
SP1 and SP2 for speaker
•
SW1 switch for playing/pausing
messages
•
SW2 switch for selecting play/rec
mode
•
J1 for jumper – if connected,
circuit will run continuously. If not
connected, circuits works through
switch SW1 or receives external
signal
•
I/P SENSOR for PIR, Coin
acceptor, or other
switches/sensors
•
LINE IN for external sound
connection
•
JM1 and JM2 for jumpers to
select the source sound when
recording. When connected to
MIC, it records the microphone.
When connected to IN, it records
the LINE IN.
•
SMP for adjusting the quality of
the recording. Clockwise
adjustment reduces the quality
but lengthens max time of
possible recording. Counter
clockwise adjustment increases
quality but reduces recording
length.
•
VOL for adjusting the sound level
of playback. Clockwise to
increase volume and counter
clockwise to decrease the
volume.
USING THE RECORDER AND PLAYBACK FUNCTIONS
How to select the sound recorder
1. To record sound through the built in MIC, connect JM1 and JM2 at the MIC side.
2. To record sound from an external source, connect external signal wire to LINE IN
and connect JM1 and JM2 to IN side.
How to record and playback
1. Remove J1 and select the recording source as mentioned above. Slide switch
SW2 to REC position.
2. Press SW1 to start recording. When recording, LED2 will light up.
3. Press SW1 again to stop recording at anytime When finished, LED2 will turn off.
4. Slide SW2 to PLAY position.
5. Press SW1 to listen to the sound. Press SW1 again anytime to stop playback.
Summary of Contents for GSK-118
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