The Intan Technologies RHA2116 16-channel integrated amplifier array requires only three external resistors (to set amplifier bandwidth), two capacitors (to smooth power supply), and one square centimeter of board area. Intan Technologies digital-output and analog-output amplifier chips are small, low-power silicon devices that replace the followi
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ng modules found in traditional electrophysiological recording systems: Intan amplifiers have high input impedances (more than 10 megohms at 1 kHz), so high-impedance electrodes may be connected directly to the chips. The amplifiers use proprietary low-noise circuits to achieve an input-referred RMS noise level of approximately 2 microvolts, allowing small physiological signals to be resolved. The tiny AC signals acquired by physiological electrodes are usually accompanied by relatively large DC offsets that drift slowly with time. Intan amplifiers incorporate high-pass filters on each channel to block large DC potentials and undesirable low-frequency drift or artifacts. The cutoff frequency of these filters is configurable over a wide range. Biopotential signals must be amplified (relative to a reference electrode or negative electrode) from the microvolt level to the volt level to match the full input range of high-resolution A/D converters. Intan amplifiers provide suitable gain for observing signals up to +/-5 mV in amplitude with sub-microvolt resolution using modern A/D converters. Differential amplifiers should also have good rejection of common-mode noise. Prior to sampling and digitization, a low-pass filter must be used to limit the bandwidth of each amplifier and prevent aliasing. Additionally, this filter may be used to attenuate undesirable high-frequency signals or artifacts. Intan amplifiers incorporate...
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.....
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