Elenco Snap Circuits SnapMicro ® I Standard - Manual (Page 72)

71
PROJECT 20, Audio Amplifier and the Microphone (X1)
Build the Snap Circuit shown below. For those familiar with electronic circuits and
schematics a drawing of this circuit is also included.
Schematic Drawing
Make sure the computer speakers are turned on and the volume or loudness control is not at zero.
Also make sure the microphone input is on by checking the controls as shown on the next page.
R2 1K
R4 10K
R5 100K
C4 100uf
X1 Microphone
Q2
NPN
B3
4.5V
S1 Switch TO MICROPHONE INPUT ON COMPUTER
B
C
D
E
F
2 3 4 5 6
A
G
1 7 8 9 10
2
1
2
1
2
2
1
2
TO COMPUTER
Microphone Input
1
3
1
2
2
3
MICROPHONE CABLE
1
1
2
2