RMoy

Simple 12V 0.5A headphone amplifier convergent with the CMoy's design and philosophy. This is in early alpha stage but will be on Tindie soon.

Background

Initially named "Seven Wonder", I realized that this converged with the famous CMoy headphone amplifier, freely available. I decided to open source it for others to enjoy.

Specifications

• Gain is 16x (a little high, giving R5 and R6 less resistance, around 1 kOhms, could theoretically result in a 11x gain amplifier)
• OPA2134 opamp (in the process of testing other opamps out there but this seems to be most happy)
• Nichicon UKA capacitors in the signal path (needed for coupling)
• The same magenta LED used in the BD139 Thing

Caveats

• No knob like the CMoy has, computers and other devices have digital OS volume control. Use those.
• Doesn't fit in an Altoids tin unless you modify C7.