Category: Electronics

Korg Nutube – vacuum tube sound in a smaller package

Vacuum tubes are now almost obsolete because they are huge and consumes more power than a typical transistor but many guitarist and audiophiles still prefers vacuum tubes over solid state amplifiers mainly because vacuum tubes have warmer sound. Korg now made a modern vacuum tube which is smaller and consumes less power. Now you can enjoy the vacuum tube sound with just using a battery, thanks to its lower current consumption.

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Simple Current Sensor for Arduino and PIC

Last time I have posted a simple Current sensor for Arduino using only a resistor here in this post. But there are some problems on this kind of simple circuit and they are 1)  very lossy due to the big voltage drop on the resistor 2) if you decrease the voltage drop on the resistor, it will decrease the resolution 3) There is a significant voltage drop on the load at higher load current which is not good. The allegro current sensor ACS7xx series is a good alternative but it cost too much for my project so I search for another option.  Then I found this ZXCT1008 that is just right for my application.

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Passive Bass and Treble Booster

In most cases, we love to set the bass and treble setting to maximum when listening to music. This gives us a nice sound with bass and treble turned up. Here’s a simple circuit than can be placed at the input of your amplifier to boost the bass and treble. Keep in mind that this circuit is passive, meaning you can’t really boost signal using a passives circuit.

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Stereo Tone Control using transistor

Last time I posted about a tone control project using tone control here: simple-tone-control-design/

But that project is only a mono one and you must build 2 to have an stereo channel. So I made a simple PCB design for those who want to build the stereo version. For more information please click on the link above. It is basically the same.

 

The PCB design is made using Eagle PCB as usual and using a single layer PCB

Download:



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