The telemetric physiologic monitors transmit measurements of bodily functions from beneath the skin of a live animal to a receiver beneath the animal`s cage. The smallest transmitters the company makes, are their ` mouse ` transmitters. These were of particular interest to Dr Matthew Walker of the Department of Clinical & Experimental Epilepsy,
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Institute of Neurology, Queens Square, University College London. Dr. Walker was dissatisfied with DSI because the company insisted that users of its transmitters spend thousands of dollars on DSI`s data acquisition hardware and software in order to communicate with the transmitters. Dr. Walker deemed this hardware and software to be cumbersome and unecessary. There appeared to be no convenient way to set up communication between the DSI software and Dr. Walker`s existing data analysis software. When Dr. Walker asked DSI to tell him how he could connect the receiver electronics beneath each animal cage to his own data acquisition electronics, they refused to tell him how the receivers communicate. We at Open Source Instruments ( OSI ) studied the specification of the DSI transmitters, in particular the requirement that each animal live in its own cage with its own dedicated receiver. We decided that we could design and build a superior system. All OSI designs and software are distributed for free under the GNU General Public License. We charge our customers when we design a new circuit or write a new piece of code, but we distribute all existing designs and code for free. Apart from being free, our software has many advantages over DSI`s software. Our software runs on Windows, Linux, and OSX. It is built around the TCL/TK scripting language, which makes it easy for users to communicate with the software and build their own...
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....
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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....
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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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