PIC software programme for solid state preamp - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 9th January 2004, 07:36 PM   #1
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Question PIC software programme for solid state preamp

I'm building a solid state preamp using analogue switches as input selector plus some other "nice" functions. I was wondering if someone in this forum has a PIC based software programme that I could use for this?

My needs are as follows:
- Selecting one of eight inputs
- Outputs for 100% Mute and -20 dB Mute
- Output to Mute Power Amp, when listening to headphones

I have a PIC programmer laying, however I had never had the time to look closer to it, and the "old" day using mnemonics has passed

I think I'll be able to do some minor modification to the software myself, but I prefer "as close as possible"

Thanks in advance.................
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote
Old 20th January 2004, 05:35 PM   #2
diyAudio Member
 
roadkill's Avatar
 
Join Date: Jan 2003
Location: Fort Collins, CO
ACD,

I've made something similar, please see my website. The number of inputs is less than what you wanted, but it can be changed. It has the following features:

* 4 inputs selected by an analog multiplexer (looking back, I wish I used relays)
* IR remote control (any Philips RC-5 compatible remote)
* LM1973 uPot attenuator (supports 78 steps between 0dB and -70dB, has a -100dB mute function also)
* Battery backed NVRAM to store parameters
* Alphanumeric LCD display driver

It works fairly well, but there's noise coming from the PIC sending data over the SPI bus to and from the NVRAM chip, which also has an RTC (displays the time on the LCD when idle... kinda lame, eh? ). My site has schematics and a ZIP file with source. Hope this helps...
  Reply With Quote
Old 20th January 2004, 05:58 PM   #3
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Thanks Roadkill,
I take a look
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote
Old 20th January 2004, 07:44 PM   #4
Nisbeth is offline Nisbeth  Denmark
diyAudio Member
 
Nisbeth's Avatar
 
Join Date: Jan 2001
Location: Denmark
Hey Jan. Have a look at this thread Remote passive preamp kit Maybe Mikkel can be of some help to you?


/U.
  Reply With Quote
Old 20th January 2004, 08:06 PM   #5
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Tak Nisbeth
I have emailed Mikkel, so lets see what happens.....
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
solid state metal preamp fingerwizards7 Instruments and Amps 34 3rd February 2011 09:02 PM
Diy Solid State Preamp Pocoyo Solid State 21 17th July 2007 03:53 AM
hifi solid-state PREAMP ... Ahmad_tbp Solid State 34 20th June 2005 10:10 PM
Solid state preamp gchrist Solid State 4 7th April 2004 10:19 AM
PIC programme software for Solid State Preamp Jan Dupont Solid State 3 10th January 2004 08:56 AM


New To Site? Need Help?

All times are GMT. The time now is 12:32 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2