The Theramidi is a new musical device, based on the Theremin, which produces a MIDI signal relative to the movement of objects to or away from it. The MIDI output is controlled by the intensity of light falling onto two Light Dependent Resistors (LDRs). One LDR determines the note frequency and the other can be programmed to control a variety of M
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IDI effects eg Volume, Modulation etc. (see Table 1). The resistance depends on the amount of light falling on it and this variable resistance is converted by a PIC 16F877 microcontroller into a MIDI signal which can be pre-programmed as in Table 1. At power-on, if the programme switch is simultaneously ON, then the unit will enter programme mode. The 4-Way DIP switch positions are read and stored in the EEPROM, and the unit will operate as shown in Table 1. Programming the Light to MIDI Unit only has to be done once and the switch positions are stored internally in the EEPROM and the unit will continue to operate in this mode, even when power is removed, until reprogrammed. Operation mode is set via DIP switches 1-4 (See Table 1) in programme mode which allows the unit to produce linear/logarithmic etc. responses to the movement of an object (e. g. a hand) blocking the light falling onto the LDR.
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....
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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