Chip Amp Photo Gallery

[linuxworks]

Originally Posted by CRST

I was thinking that for my next system / remote, I'd add the ability to display (volume, CD tracks, station, etc) on the remote itself. You can get relatively inexpensive TFT panels now. Carve a nice case, a little firmware, rechargeable batteries, and perhaps I have something.

otoh, smart phones and tablets are the 'new hot thing' these days.

I would consider some way to have a web back-end be the way into your system (or one way in). on my project I picked simple rs232 serial and have a simple protocol for the remote to send cmds and queries in via serial. this works for both the xbee style remote AND also an apache webserver on some linux box, somewhere (could even be a one board plug-style/marvell ARM board).

then you can spend the rest of your time doing android and ios apps for your stereo (I'm only half kidding, too).

I think all my new projects will be split 'in half' and have a serial connection between client and server, just to be able to have multiple management ways 'in' to the box. IR is cheap and easy; but a serial back-end gives a lot of fancy 2-way utility.

[Professor]

Hi! My PA-100 prototype with separate power supply =)

[frank1]

Originally Posted by Professor

Hi! My PA-100 prototype with separate power supply =)

It's really nice to see a truely DIY project using your own PCB's etc.
I always hate to see heat-sinks inside boxes though :-(
Looks like a sealed diecast box?

Frank

[Professor]

Originally Posted by frank1

It's really nice to see a truely DIY project using your own PCB's etc.
I always hate to see heat-sinks inside boxes though :-(
Looks like a sealed diecast box?

Frank

Hi! Yes this is aluminium diecast box. Heatsinks are densely pressed to box walls and the box serves as heatsink continuation with the big area. I can drill holes but i dont like dust in the case =)

[diarav]

Originally Posted by Professor

Hi! My PA-100 prototype with separate power supply =)

Great Build! I like the fact that the PCBs are built on the volume control, source selector, and the RCA inputs - ensures neat wiring. May I know what chip you are using on the RCA inputs for source selection? Or is it a relay?

[mindutis]

yeah, what solid state relay can hold up to 2V?

[Professor]

Originally Posted by diarav

Great Build! I like the fact that the PCBs are built on the volume control, source selector, and the RCA inputs - ensures neat wiring. May I know what chip you are using on the RCA inputs for source selection? Or is it a relay?

This is 12V reed relay EDR302A1200

[Professor]

Big photos there ?????????? - mymegahobby Jimdo-Page!

[speaker]

Originally Posted by diarav

Great Build! I like the fact that the PCBs are built on the volume control, source selector, and the RCA inputs - ensures neat wiring.

I agree, the layout is well executed.

[Oery]

Here's my little project

On power board.
IC: LM3886T
Resistor: (all) Takman 1/2w Metal Film
Capacitor Elc: 3x 100µF/50V Elna Cerrafine, 2x 22µF/50V Nichicon
Capacitor: 2x 100nF/250V Wima MKP10
Capacitor Coupling (DC Blocking): 2x 1.5µF/400V MKP Solen (Original)
Capacitor Power Supply: Nover AudioGrade 4x 6800µF/50V
Potentiometer: Alps Blue Beauty
PCB: XY HiFi (Dual Layer Fiber Board)

On tube buffer board (based MF X10D)
Tube: 6BQ7 + Octal Socket
Resistor: Takman Carbon, Allen Bradley, Riken, Standar Metal Film (1% Tolerance)
Capacitor Elc: 2x Panasonic FC Blue 2200µF/25V, 8x Nichicon Gold 1000µF/35V, 2x Nichicon Muse BP 10µF/50V
Capacitor: 4x ERO 220n/250V MKC1862, 2x Soshin 220pF Silver Mica
Capacitor Coupling (DC Blocking): 2x Siemens 3.3µF/100V
Capacitor PowerLine Filter: RIFA X2 100nF/275VAC
Diode: 5x Vishay BYV26E Ultra Fast Avalanche Sinterglass Diode
PCB: Lite Audio (Single Layer Fiber Board)

Hope you like it......