The Insomniac Recovery Circuit is a new alternative in the effort to deal with this sleepless taker. This circuit is a simple circuit that produces rain sound effects. The Japanese researchers are the first to suggest that the sound of rain has a relaxing effect. With the help of this simple circuit we can produce a sound of rain that can help to put someone to sleep in case of insomnia.
Below you can see and learn the scheme:
Component :
R1=270K
R2=100 Ohm
R3=220K
R4=270K
R5=2,7K
R6=220 Ohm
R7=47 Ohm
C1=10nF
C2=0,1uF
C3=1nF
C4=10uf/25V
T1=BC107A
T2=2N1613
IC1=741
P1=47K
P2=100K
LS=4-32 Ohm
Power Supply = 12-30V/60mA
Actually Insomniac Recovery Circuit is a series of rain sound generator. T1 is used as a noise generator and the signal is amplified by IC 741 and through T2, R7 and C4 goes to the headset with low resistance. If you do not want to use headphones you can replace them with speakers with impedance between 4-32 Ohm. With the help of p1 can adjust the sound level and P2 with tone.