Go Back   Home > Forums > >

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

My new preamp design: Arduino, 6 input selector, MDAC attenuator, IR etc
My new preamp design: Arduino, 6 input selector, MDAC attenuator, IR 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
Old 29th November 2016, 08:12 PM   #21
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: Berlin
I added the BoMs:
https://github.com/FutureSharks/prea...l-of-materials

Many of the parts can be substituted.
  Reply With Quote
Old 1st December 2016, 02:36 AM   #22
danvcs2 is offline danvcs2  United States
diyAudio Member
 
Join Date: Nov 2016
Location: Chicago
Those are some awesome enclosures!
  Reply With Quote
Old 6th December 2016, 11:58 AM   #23
doneganm is offline doneganm
diyAudio Member
 
Join Date: Oct 2016
Quote:
Originally Posted by maxw View Post
Thanks. For display I don't know yet. I think LCDs look cheap so not so keen on that idea.

You can definitely use cheap encoders! I don't know what problem you had in the other thread but I've used many cheap encoders before without issues. Sometimes they need some hardware of software debouncing but it's definitely possible
For a display I also didn't like LCDs and in the end settled on a 3.12" 256 x 64 OLED display connected via hardware SPI to a Teensy 3.2 (tiny arduino running at 127 MHz with loads of memory). It's a very sharp display and updates very quickly - perhaps 50 fps or more. Custom fonts and graphics are easy enough to achieve.

I got mine from here: SPI 3.12" ( 3.2" ) 256x64 Graphic OLED White Display ( SSD1322 ) Arduino PIC ARM | eBay
  Reply With Quote
Old 6th December 2016, 04:17 PM   #24
dimkasta is offline dimkasta  Greece
diyAudio Member
 
dimkasta's Avatar
 
Join Date: May 2010
Location: Athens
I like your RCA idea.
But how easy was it to solder that chunky metal to the pcb? Did you use a torch? Did you have problems with the plastic insulation?
__________________
Too many projects... so little time...

Last edited by dimkasta; 6th December 2016 at 04:21 PM.
  Reply With Quote
Old 6th December 2016, 04:27 PM   #25
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: Berlin
Quote:
Originally Posted by dimkasta View Post
I like your RCA idea.
But how easy was it to solder that chunky metal to the pcb? Did you use a torch? Did you have problems with the plastic insulation?
It was easy with my 100W soldering iron. No issues with the insulation. A small issue is that the PCB warped slightly I think due to the heat but once mounted it sits flat. I think I could avoid this next time by just being more careful and waiting for the PCB to cool between each socket.
  Reply With Quote
Old 6th December 2016, 04:56 PM   #26
dimkasta is offline dimkasta  Greece
diyAudio Member
 
dimkasta's Avatar
 
Join Date: May 2010
Location: Athens
Did you try the 805 sockets?
CMC®-Charming Music Conductor.

They should be easier to solder with those spikes at the back. And you would just need two more holes on your pcb part
__________________
Too many projects... so little time...
  Reply With Quote
Old 6th December 2016, 05:01 PM   #27
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: Berlin
I have some of these and I'm not convinced they would be easier. There is no flat surface to make contact with the PCB and those "spikes" aren't round. So what I think you would end up with is those square poles in round holes.
  Reply With Quote
Old 6th December 2016, 05:47 PM   #28
dimkasta is offline dimkasta  Greece
diyAudio Member
 
dimkasta's Avatar
 
Join Date: May 2010
Location: Athens
The one plus I see with them is that they would go through the pcb, so there should be some more mechanical strength to support the whole thing during operation and while tightening the rings from the outside of the chassis.

With the flat surface soldering, any rotation strength or vibration transfers directly to the copper on the pcb.
__________________
Too many projects... so little time...
  Reply With Quote
Old 6th December 2016, 08:33 PM   #29
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: Berlin
Maybe. Wasn't really a problem so far though. Feel free to fork the design and create your own
  Reply With Quote
Old 6th December 2016, 10:11 PM   #30
dimkasta is offline dimkasta  Greece
diyAudio Member
 
dimkasta's Avatar
 
Join Date: May 2010
Location: Athens
Yeah I will probably order some tomorrow and see how the idea can fit in my buffer pcbs
__________________
Too many projects... so little time...
  Reply With Quote

Reply


My new preamp design: Arduino, 6 input selector, MDAC attenuator, IR etcHide this!Advertise here!
Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
PCBs: Dual TPS7A330 PSU, 6 input relay selector, MDAC attenuator, 6 way RCA board maxw Swap Meet 13 8th January 2017 02:52 PM
My Preamp Project: Arduino, I2C, relay selector+attenuator, tube stage maxw Analog Line Level 63 31st March 2015 07:33 PM
Relay Attenautor, Input selector and Arduino £35 maxw Swap Meet 4 10th December 2013 12:38 PM
Arduino based Input Selector for preamp _atari_ Analog Line Level 5 30th June 2010 03:42 PM
Lightspeed Attenuator + Input selector zristic Solid State 21 11th January 2010 03:17 AM


New To Site? Need Help?

All times are GMT. The time now is 02:27 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki