Hey, I have a good idea...Lets design and build something! I have a project if anyone is interested.

Bummer...

I don't have a schematic or the amp in front of me so I have to speculate. Sorry, the 1455 is a dual 555. 180mV is pretty high for a headphone amp. With the protection circuit engaged, you should see nothing at the headphone connector. The relay could be implemented as either open circuit or...

Pin 8 on the protection chip should be the mute timer input. It should go from low (muted) to high (unmuted). You could even drive it high manually.

Has the amp developed a DC offset? That will trip this circuit. You will have to check before the mute relay.

They come in male and female and various styles. Their use is only limited by your imagination.

It is called an MMCX connector   it is commonly available from sources like Digi-key and mouser

I would just go with something like this: http://www.digikey.ca/product-detail/en/panasonic-electronic-components/ECQ-E1225KF/EF1225-ND/56392

Check out the Doodlebug on Beezar Audio and see if that is what you are looking for.

What sample rate and bit depth are you using? The Doodlebug is a black and white kind of device. Either it works perfectly or it doesn't work at all. The Doodlebug can only support USB full speed operation. High speed is not supported. Due to the complexity of the USB High Speed signal, there...

A cMoy is what a cMoy is. It doesn't really go out of date. Tangent's guide is pretty good at holding your hand through the process. Just read it all the way through. Let us know how it goes!

I want to abide by the thread rules of not saying anything negative, so I will just keep quiet. If the snake oil makes them happy then let them be happy.

Here is my contribution:   317/337 (and family) adjustable regulator tweak.   Replace the voltage setting resistor with a semiconductor.   Typical 317 regulator implementation:   Typically R2 sets the current through R1 and the voltage drop of R1 plus 1.25 volts is the output...

Lawn Flower  

I did something like that back in the early eighties...