@manniraj No, it hasn't been documented yet on diyAudio. However, I posted a picture in an earlier post of the stepper motors and pots. Here is a short description for now, but I'll document it later when it's been properly tested.
PS: I'm toying with the idea of making the attenuator available commercially, either as a full product or maybe just the PCB and the microcontroller with firmware already flashed, and then the user can purchase the other components locally and assemble it.
Stereo attenuator with balance control
Features
- Stepper motor actuated potentiometers
- Infrared Remote Control
- Hi-resolution TFT LCD Display
- User configurable settings
- Fast 32-bit microcontroller
- Auto-dimming display
Description
The [xxxxxxx] Attenuator is a stereo attenuator utilizing high quality Cermet potentiometers for audiophile quality sound. Balance control of the two channels is made possible by controlling the stepper motors individually. The use of advanced SilentStepStick driver technology ensures low noise operation.
Remote Control
An IR (infrared) remote control is used as the main method to make adjustments to the volume level of the preamplifier. Works with the aluminium remote-controls of the Apple TV, TV2 & TV3, (generation 1, 2 & 3). Replacement Apple remote-controls will also work, however the Apple Siri remotes won’t.
Front Panel Knob
There is also a fine-resolution rotary encoder on the front panel to change volume and balance, and to make other adjustments, i.e. changing the color theme and display brightness.
Display Screen
A 2.4”TFT LCD screen displays the information of the various menus in a smooth, clear font. The volume and balance displays are shown in large characters which should be easily readable at a normal music listening distance.
The intuitive menu system includes screens for volume, balance, brightness, color themes and the settings menu. An optional flash screen can be activated via the settings menu. When activated, the flash screen will display after system start-up and will be replaced after time-out by the main menu which displays the current volume setting. The user also has full control via the settings menu over menu time-out delay, screen fading time-out and fading percentage.
Please note that this is a work in progress... I'll post more in a separate thread at a later stage.
Casey Jones, huh?
It's OK, I'm a Friend Of The Devil... and your luggage is roasted, we took the Iron out and put a Lump Of Coal in it. 😈 😳
I got a couple of Muses volume controls. One of them has a remote control. Still haven't found an application for them, though.
Engineers have no luggage. Carry all in our Bibs...
Yeah... handling all of those lumps of coal.... but the party is out in the caboose..
🍸
@tonyEE
I got bored and frustrated waiting for the Iron Pre kits and started on the remote project to keep my brain and hands occupied. It's working very nicely, but not connected to a preamp yet. Hopefully soon...
It's OK, I need more voltage gain... No Iron for me... I need Uranium. Real 'heavy' stuff.
I wonder if anyone has built transformers out of heavier metals than iron.
Perhaps using silver in the windings.... how about the cores? I assume iron is used for its low cost, but
EDIT... hmmm.. it looks like Iron has the highest permeability, hence it's used as the core. So silver/gold windings with an iron core...
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have a friend (in fact, also Moderator on Baby DiyA) - he's usually driving Iron Horse all over the Europe, 100km/h, 3KTons
go figure
https://www.youtube.com/@zerowaf/videos
go figure
https://www.youtube.com/@zerowaf/videos
Ever been to the California State Railroad Museum in Sacramento?
Nothing against your friend's locomotive... but.....
We had one of these leave the yards East of LA after it got refurbished.... it was a BIG event, Live TV, helicopter coverage, etc...
Went to some museum outside of California... sad.
BIG! REALLY BIG! like HUUUUUUGE... Look at the driving wheels.
I'm old enough to have seen them in period.
So much so I unloaded the cars of lumber and cement by hand. No truck delivery in those days.
So much so I unloaded the cars of lumber and cement by hand. No truck delivery in those days.
Regarding using a transformer to couple a signal I remember I read that Audio Note used silver foil capacitors as coupling caps in their High-End amplifiers but used interstage transformers in their "super" high-end amplifiers. That choked me a little bit that transformer can be that good. Apart from that I know nothing about Audio Note. I have never experienced their amps but I have seen silver foil caps priced at the USD 1000 range.
They still like transformers to couple a signal:
https://www.audionote.co.uk/interstage-transformers
In Iron-Pre the transformer also amplifies. In theory it can swing more voltage at output than the rails?
It must be very resistant to "clip" signal at the output.
They still like transformers to couple a signal:
https://www.audionote.co.uk/interstage-transformers
In Iron-Pre the transformer also amplifies. In theory it can swing more voltage at output than the rails?
It must be very resistant to "clip" signal at the output.
there is a Audio Note, and there is a Audio Note
first and original one is Audio Note Japan**
they were and are Artisans
second one are .... well, Enterprise
**at first just Audio Note, "Japan" added later to differentiate from Enterprise
first and original one is Audio Note Japan**
they were and are Artisans
second one are .... well, Enterprise
**at first just Audio Note, "Japan" added later to differentiate from Enterprise
Artisan?
https://www.audionote.co.jp/en/products/power_amplifier/ongaku.html
They like Iron and silver?
https://www.audionote.co.jp/en/products/power_amplifier/ongaku.html
They like Iron and silver?
