The magnetometer was moved to an outdoor location and a specialized enclosure was built. An accessory temperature controller was included to maintain a constant temperature and digital link was created to ferry the recorded data back into the laboratory. During the August-September 2000 refurbishment, the magnetometer was moved from the thermally stable but magnetically
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dirty basement laboratory to new magnetically cleaner but thermally unstable location outside and away from any building. Of course, it could not be left outside exposed the elements so an enclosure was built to provide a controlled environment. An accessory temperature controller was included to maintain a constant temperature and digital link was created to ferry the recorded data back into the laboratory. The enclosure can be seen in the accompanying images in various states of assembly to show the different techniques used in its construction. Many of the materials can be found around the house or at a local hardware store at a modest cost. Approximately 4`x3`x2` (LxWxH) in external dimensions, the enclosure consists of a wooden frame built with two-by-two stock covered on the four sides with 0. 25" thick plywood, chip board, or particle board (whatever was available in the junk box. The top was left open to accept a 0. 25" thick plywood lid; the bottom was also left open to accept a false floor. The vertical two-by-twos extended about 6" below the sides with pointed tips and were driven into the ground for anchoring. A quiet, shaded location was found beneath a large native Colorado Blue Spruce tree which was cleared of dead branches. The ground was leveled and excavated to a depth of a few inches. a layer of heavy vinyl plastic was placed over the excavation, small undersized cuts were made at the locations of the...
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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