Thanks for the reply..

I just want to use a PC Oscilloscope to do basic  RF troubleshoot and learn more about the electrical signals...

Got a pair of 315Mhz RF Transmitter and Receiver.. could not get it working with Arduino... and cannot "see" RF so need an DIY oscilloscope to "see" the RF. Will I be able to "see" anything since the soundcard is only at 44.1Khz ??
I use Arduino bcos of a few reasons :-

1. It is easy for beginners / noob like myself ( I'm a very new to electronics ) cos it was designed for artists/fashion designer

2. It is open source hardware ( parts is easily available here in Malaysia ), read my blog for details..

3. Lots of vendors selling Arduino here in Malaysia

4. Lots of libraries and a very large communities worldwide ( http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?board=projects )

5. The language is C like... make me feel at home.. (other MCU lang looks like assembly lang... yucks!!! )

6. I hv figure out the LCD portion, the IR remote RX/TX should be easy, lots of articles online using Arduino
What is a high end attenuator ??

I'm currently using a TA-2020 MKIII made by one of the forumer here, just using it, did not modify it or anything... just use it to drive my bookshelf speakers...

You can read up a very good tutorial here :-
http://www.ladyada.net/learn/arduino/

IR remote stuff here :-
http://www.ladyada.net/learn/sensors/ir.html

You can buy an Arduino locally in KL at : http://www.homebrew-tech.com/

Hi Audio DIYers..

I am interested to make another audio amplifier since after 19yrs ago my first amplifier was built with the help from my friend. I have no knowledge in electronics stuff due to I am a fully mechanical guy. I'm doing the casing n assembling work while my friend was doing the soldering n fine tune the amp. for me.

Recently when I was clearing my old junk drawer, I found an unused toroidal transformer, therefore I would like to start another DIY to make use this transformer.

The specs for the transformer,
Made: Nuvotem
Primary - 0 - 230v
Sec. : 2x 0-25v (2.4A)
Power rating - 120VA

Is there any DIY project amp. suitable to use this transformer?
Thank you.

OMG this sounds cool, Let kick start a project together! My Asus Xonar D2X 's ADC is at the weak side, I am thinking to build myself an 24bit ADC before I buy the modulus86, so I can measure the complete products (at least down to 0.001%)   

How many layers PCB you are able to prototype bruh?

Are u still interested ? I am in

Ok let's plan what amp to build..

Got minimum amount for discount prices?

I am thinking to build something can integrate make it work with WiFi, Blueetooh and ethernet so can make it look like an IoT Ready DAC  .. What's your opinion ?

Since you said let's do it simple. Let's do a class A amp with BJT design ? Do you agree ? do you have a reference source for it ? else i will find one
Let's finish that and connect it with a development board I have (STM32), it has audio support. Can do streaming. There's a DAC in it.