Circuit AD1865 is considered like best 18bit stereo audio DAC ever. I already built another DAC, that I will not say everything again. However I found, that current output is too weak and instead of using external I/V converter I used this, what is included in DAC. Because DAC doesn`t have buffer for data, that both channels was not on the output
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simultaneously, but alternately left and right channel. This can produce theoretically hearable phase-shift. Last I want to connect DAC to USB receiver with only I2S data output. All troubles solve following circuit. Supplying need two separated windings on power transformer, because I used positive voltage regulator for negative supply branch. After rectifiers B1 and B2 are filter capacitors C1 and C2 and behind them group of block capacitors. I used available low-drop voltage regulators LE50. One is for supplying of digital part and two are for positive and negative analog part of dac. Closely to regulators and integrated circuits are small filter and blocking capacitors. DAC doesn`t have I2S input, which is usual. It has individual data inputs for left and right channel and individual "latch" inputs which rewrites data from internal register to DAC output. Input data in I2S format (left justified) are first delayed for 13 bits thus that after shifting of 18 most significant bits to the dac register they will be written to output. For simultaneous playing of left and right channel we must delay data of left channel for 32 clocks (frame lenght for one channel). Result is that data for left and right channel are shifted together to the dac and they are written to the output with common latch signal. Because there doesn`t exists 32bit shift-register I had two choices. Create them with help of Xilinx, but I have not...
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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