The goal of this project was to build a circuit that would monitor a person`s sleep activity and, eventually, give feedback on that activity to the user. The purpose of this was to induce lucid dreaming in the subject. When sleeping, people generally alternate between different cycles. Those cycles are often described as REM cycles, that is Rapid Eye Movement
Click here to download the full size of the above Circuit.
cycles, and non-REM cycles. While the brain activity during non-REM cycles has distinguishing features, the brain activity during REM cycles is nearly identical to that that occurs when a person is awake. In addition to brain activity, several physiological signs of REM activity can be observed, the most obvious of which is the movement of the eyes. Since most dreams occur during the REM cycles and since brain activity during REM is close to that of a conscious mind, it is possible to achieve consciousness during a dream. The problem, of course, is that dreams seem real: it is hard to realize that dreams are dreams and not reality. One way to do this is to learn to recognize signs: in dreams, things that do not usually happen in real life, such as flying elephants or malfunctioning equipment like light switches. Another way is to have a device that would monitor the person and give a signal when REM sleep is detected. That signal can be a visual or auditory cue, strong enough to be noticed but weak enough to prevent the person from waking. Since the moving eyes can be seen through the eyelids during REM, it should be possible to build a device to detect this movement and give visual/auditory cues to the user. This can be done by shining a light at the eye and measuring the amount of light that is reflected; when that amount changes, it means that the eye is moving. To avoid awaking the user when probing, an infrared light...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: