So long as the visitor stretches out one`s hand and crosses the black harp of that entire body, the tone will be played . Why is not there the string to play S
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He says, this is the laser harp. This laser harp lets me recall a lot of old affairs of many years` standing too, I have ever said to classmates for a long time, I can make a laser harp too, still and his bet, but because the question of time has never been finished. Has seen the laser harp of the Iranian hall, I decide to produce it, it is certainly a very simple and crude laser harp. But to friend and speech fond of DIY, it is a good intention that is made small. Install 5 3. 0V laser tubes on the wood block above, and fix on wood block below with the hot-melt adhesive. Bore the hole with the bit of 0. 8mm, and install correspondent 5 pieces of photo resistance, namely make up the fundamental base. Then, put cell box No. 5 in the appropriate place, fix with the hot-melt adhesive. Finally, according to the power schematic diagram, connect the correspondent lead wire with the socket, in order to facilitate the staging of back-end connected sum. Finally, connect with circuit board base again. I successively made two kinds of circuit of the base, the ones that adopted were these two one-chip computers of AT89C2051 and ATMEGA8 separately. Certainly, characteristic and result are different. Because the material is limited, I have only made the works of 5 strings. It is very simple for this making to weld, are all the components and parts of DIP, use the insulating mantle line according to the schematic diagram, connect and...
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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