Instructions

- 6 -
Construction
R...
R1 ... R3 : 4K7 (4 - 7 - 2 - B) 
R4, R5 : 1K (1 - 0 - 2 - B) 
R6 : 100K (1 - 0 - 4 - B) 
R7 : 47K (4 - 7 - 3 - B) 
R8 : 390 (3 - 9 - 1 - B) 
R9 : 10 (1 - 0 - 0 - B) 
R10 : 10K (1 - 0 - 3 - B) 
Resistors
Ceramic Capacitor
C1 ... C9 : 100nF 
Diode (Check polarity!)
CATHODE
D...
D1: 1N4007 
3
2
1
IC-socket
4
IC1 : 28p 
IC2 : 8p 
Ceramic Capacitor
5
c...
C10 : 47nF 
Trimmer
6
Push buttons
7
SW...
SW1 : record 
SW2 : play 
SW3 : erase 
SW4 : next 
Voltage regulator
8
VR...
VR1 : UA78L05 
Pin-header
9
JP1 : 2pins 
Microphone
10
MIC1
MIC1 : M300 
DC-jack
11
SK1 : 9 ... 12VDC 
Watch the Watch the
polarity!polarity!
RV1 : 100K  (Sample Freq.)
RV2 : 10K  (volume)
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