From a SONY double tape decks with model number `SONY TC-W230` I have picked a nice LCD VU-meter. I have decided to add it to my computer tower case. the following steps explain how to do this. this is based on IC lablelled CXD1017 (impossible to find a datasheet) on the printed circuit it is easy to identify the connected wires (second photo redrectangle) so we can see: The first think that I have done is to look for the
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schematic circuit of this HIFI equipment and after a long time I have filnally found the service manual. So the following photo shows the VU-Meter schematic diagram: The lapms used in the VU-Meter to lighten the LCD consume a lot of current this why they are powered by a symetric source -6V and 6V. I have decided to replace them with 4 white LEDS. Before I have decided to mount the VU-Meter I have decided to test it because I have picked it from salvaged audio equipement and I don`t know if it function or not. As my computer is connected the AUX input of my HI-FI system via RCA connectors I have to add an adaptor to convert the audio channel from jack connector of the computer sound card to RCA connectors going to the HI-FI system. this circuit is a simple parallel connexion between jack connector and RCA connectors.
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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