Baby Watch Over / Baby Watch Out Circuit Diagram


Sudden Death Infant Syndrome is a condition when a healthy looking infant (usually on age 0-1 year) suddenly death without any explanation. This is a mysterious problem, and right now the scientists in the USA is trying to figure it out how to prevent this.

Meanwhile, there is a circuit to monitor your baby even thought you are not nearby. This baby watch out circuit is a simple schematic and effective. It doesn’t cause danger to the baby. This small device is inserted in the diaper area. Here is the schematic diagram :

Baby Watch Over   Baby Watch Out Circuit

Baby Watch Over Circuit Diagram

The component list :

R1=15Kohms
C1=22uF/25V
Q1=BD139
R2-4=1Kohms
C2-3-6=100nF/100V MKT
Q2=BD140
R3-7=1Kohms
C4-9=1uF/25V
IC1=TL072
R5=220Kohms
C5-8=100pF/100V
F1=Fuse 0,1A
R6=1Mohms
C7-10=470uF/25V
P1=470kohms Trimmer or potensiometer
R8-9=1Mohms
C11=100nF/100V MKT
TR1=220Vac/9V 0,2A Transformer
R10-11=47ohms
C12=1000?F/25V
M1=Electret condenset Microphone
R12-14=10Kohms
D1-5=1N4002
S1=2X2 1A SW
R13=1Kohms
LD1=Led 3mm RED
BATT=9V Battery
R15=2.2Kohms
RL1=Small RELAY 12V DC


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