Make an electronic focuser to help with the astro-photography. The electronic focuser project allows accurate focussing under computer control. This is most useful for eyepiece projection astro-photography where I found that touching the focuser was enough to knock the object from view, because of the higher magnification factors involved. The stepper motor for
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the focuser is controlled by the DSC project board, using spare control lines on the ports. These controls allow the stepper motor to be enabled/disabled and moved in either direction at a rate determined by the software. These control lines are connected to a dedicated stepper motor interface IC to simplify the circuit. The stepper motor for the focuser was purchased from Farnell Components part no 7134423. The motor has a step count of 200 for 360 degrees of rotation which equates to 1. 8 degrees of rotation per step. Check out the data sheet. The motor is configured in unipolar mode, which means that four of the eight wires are connected to the +12V supply, and brings the number of wires between the focuser and the interface down to five. The bracket itself was made from a piece of aluminium I had lying around and it was simply cut it to size and shaped. The original focuser was first stripped down and thoroughly cleaned as the grease used was of a very `sticky` type. I then used normal grease instead which made the mechanism much smoother to use. Next the aluminium was made to size and holes drilled to allow it to be bolted on to the focuser. The stepper motor was then fitted and marks made on the aluminium for the motor screws. After these holes were drilled, the position of the five pin DIN socket was marked out and cut. Finally the whole thing was assembled and the wires soldered from the stepper motor to the five...
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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