Biomedical Sleep Inducer



Sleeping difficulty, called insomnia, can involve difficulty falling asleep when you first go to bed at night, waking up too early in the morning, and waking up often during the night. The lack of restful sleep can affect your ability to carry out daily responsibilities because you are too tired or have trouble concentrating. All types of insomnia can lead to daytime drowsiness, poor concentration, and the inability to feel refreshed and rested in the morning. Magnetic field associated with the Earth is called Geo-magnetic fields. It is essentially dipolar (i.e., it has two poles, the northern and southern magnetic poles) on the Earth's surface. Away from the surface, the field becomes distorted. Many people experience sleeping well in natural surroundings, into a tent or a wooden hut. This fact is due not only to the healthy atmosphere but also from our unconscious ability to perceive natural Earth’s magnetic fields. Our mini project generates this type of Geo-magnetic-fields and our aim is to perceive them: in this manner our brain is surrounded by an ideal environment for a sound sleep.

Features of Sleep Inducer

* Generates a natural electromagnetic-field

* Makes easier to fall asleep

* Induces a prolonged and sound sleep without drugs

* No side effects

Circuit Diagram

Circuit Diagram of Biomedical Sleep Inducer

Electronic Components Required

R1,R5___________1K 1/4W Resistors
R2_____________10K 1/4W Resistor
R3,R6__________10M 1/4W Resistors
R4,R7___________2M2 1/4W Resistors
R8,R9___________4K7 1/4W Resistors

C1,C7__________47µF 25V Electrolytic Capacitors
C2____________100nF 63V Polyester Capacitor
C3,C4_________330nF 63V Polyester Capacitors
C5,C6__________15nF 63V Polyester Capacitors

D1,D3,D4,D5__1N4148 75V 150mA Diodes
D2______________LED (any type) (see Notes)

IC1____________4060 14 stage ripple counter and oscillator IC
IC2____________4093 Quad 2 input Schmitt NAND Gate IC

Q1____________BC327 45V 800mA PNP Transistor

L1____________Radiator coil (see Notes)

P1____________SPST Pushbutton

SW1___________2 poles 4 ways rotary switch
SW2___________SPST Slider Switch

B1____________9V PP3 Battery

Clip for PP3 Battery


Select a timing option by means of the rotary switch SW1.

Choose 15, 30 or 60 minutes operation.

Select “Stop” or “Alternate” mode operation by means of SW2.

With SW2 closed (Stop mode operation) the electromagnetic radiation stops after the pre-set time is elapsed.

With SW2 opened (Alternate mode operation) the device operates for the pre-set time, then pauses for the same amount of time: this cycle repeats indefinitely.

Place the unit under the pillow and sleep like a log.

To reset a cycle press P1 push button.

Construction and Working

IC2C and IC2D generate two square waves at about 1.2 and 5 Hz respectively. These wave-forms are converted into 60µS pulses at the same frequencies by means of C5 & C6 and mixed at Q1 Base. This transistor drives the Radiator coil with a scalar series of pulses of 60µS length and 9V amplitude.

IC1, IC2A & IC2B form the timer section. C1 & R2 provide auto-reset of IC1 at switch-on. The internal oscillator of IC1 drives the 14 stage ripple counter and, after about 15 minutes, output pin 1 goes high. Pin 3 of IC2A goes low and stops IC2C & IC2D oscillation.

If SW2 is left open (Alternate mode operation), after 15 minutes pin 1 of IC1 goes low, pin 3 of IC2A goes high and oscillators are enabled again.

If SW2 is closed (Stop mode operation), the first time output pin 1 of IC1 goes high, the internal oscillator of the IC is disabled by means of D1. Therefore the circuit remains off until a reset pulse is applied to pin 12 by means of P1 or when the whole device is switched-off and then restarted.

The same thing occurs when SW1 is switched on 30 or 60 minutes positions, obviously changing time length.

IC2B drives pilot LED D2 which operates in the following three modes:

  1. Flashes quickly and almost randomly when the Radiator coil is driven
    Flashes somewhat slowly and regularly when the Radiator coil is pausing during the Alternate mode operation
    Is off when the circuit auto-stops (Stop mode operation

Highlights of the Project

This project helps in fighting insomnia. Apart from this it also supports relaxation, stress management and induces sleep easily. This project generates type of geo-magnetic-fields and it helps the brain surrounded by an ideal environment for a sound sleep.






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