Opionions on analog switches vs vacrols - Page 3 - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps

Instruments and Amps Everything that makes music, Especially including instrument amps.

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 20th March 2014, 12:48 AM   #21
diyAudio Member
 
Join Date: Jan 2010
Now I got it! I admit that I focuse on low voltage circuitry since I was struck by a fully charged 100uF / 450V anode cap some decades ago.
  Reply With Quote
Old 22nd April 2014, 02:47 PM   #22
diyAudio Member
 
Peter Pan's Avatar
 
Join Date: Feb 2010
Location: Tampa, Florida
Default found some LCR0203s

Thought I'd re-visit this thread to mention that I managed to find some of the LCR0203's without buying a huge quantity, via Ebay, for about $2. I bought a dozen for some initial testing. Again, you can get these on Ali-Baba for some unspecified price between 0 and $1 (you have to write for a quote), but the MQO is 1000. So I was happy to be able to buy a small quantity at a price that was still much less than 1/2 the usual price for a VACTROL. I haven't attempted sophisticated analysis, because the bottom line is going to be how does it perform in actual use, using my EARS as the measurement instrument. So for I've only done basic electrical measurements, and here's what I'm finding so far.

The "on" resistance, measured with about 10mA on the internal LED, was consistently less than 200R, and seemed to get there fast 9at least faster than my meter could really respond). The off resistance spanned from a few megohms to near infinite over the course of a second. Here though I found one flaw in the design. You'll get much better off resistance in much less time in a darkened room, which simply means these units are made of something much less than "opaque". I do know that this isn't surprising, having worked with Cadmium cells as solar detectors, and just bout had to bury the damn things underground to get them to be unaffected by sunlight, sop they are sensitive as hell. So f I were to use this product inside an enclosure as part of a project, I'll have to make sure its a pretty thick black case to ensure it does not perform significantly different under lighted conditions. Imagine using it in a musicians product and having it go haywire when a spotlight hit the musicians gear!

Now along those lines, I have an intended use for these, for which I'd like some opinions... but that belongs in another thread, which I will call "controlling effects pedals via VACTROLS". I'll post that shortly, so please give it a look.
  Reply With Quote
Old 23rd April 2014, 04:35 PM   #23
diyAudio Member
 
indianajo's Avatar
 
Join Date: Jan 2010
Location: Jeffersonville, Indiana USA
Thanks for the report.
With a mad CB fan driving around my neighborhood emitting "Dixie" continuously performed by the TRS80, all my projects go in a steel box. I put inductors on the power lines in. I favor index card file boxes from the charity resale shops. I realize this would be a problem for a guitar pedal project, but enclosures impervious to radio waves are also usually impervious to light. PC's use shim stock captured inside the plastic covers.
__________________
Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,1.3K, SP2-XT's, T-300 HF Proj's, Steinway console, Herald RA88a mixer, Wurlitzer 4500, 4300
  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
Source selector using Analog switches or multiplexers - opinions? maxw Analog Line Level 24 20th August 2013 09:31 PM
SSM2402 and SSM2404 analog switches jean-paul Swap Meet 0 20th June 2012 10:55 AM
Analog bilateral switches darkfenriz Solid State 9 19th February 2010 06:42 PM
Analog IC switches, how to use? Hybrid fourdoor Parts 7 3rd October 2003 03:16 AM
have you ever considered thinking about maybe using analog switches? travis Everything Else 4 8th May 2003 07:28 AM


New To Site? Need Help?

All times are GMT. The time now is 10:47 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