Piezo switch to trigger drum lights - 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 5th March 2009, 03:45 PM   #1
jman 31 is offline jman 31  United States
diyAudio Member
 
jman 31's Avatar
 
Join Date: Oct 2008
Location: Florida
Default Piezo switch to trigger drum lights

I am trying to design a simple circuit that would work with the piezo transducers on a set of electronic drums to trigger an LED when the drum head is struck. I am using a simple MOSFET switching transistor, with a 9v battery and an LED. The led has a built in resistor to handle the voltage although that is not shown on the schematic.

Can someone take a look at this and see if I have it set up properly, and if there is anything that would work better?

Thanks
Jeremy
Attached Images
File Type: png drum trigger schematic.png (3.5 KB, 232 views)
  Reply With Quote
Old 5th March 2009, 08:29 PM   #2
jman 31 is offline jman 31  United States
diyAudio Member
 
jman 31's Avatar
 
Join Date: Oct 2008
Location: Florida
I went ahead an built this circuit to test it, but now I've hit a slight snag. I will have to rely on some of you electronics experts on this one. When I use a piezo in the shell to trigger the light, it generates about 1 volt before the light will trigger. When i use a drum trigger, even when I hit it fairly hard, I am only generating about .3v.

I need the transistor to switch at around .25v.. I couldn't find the one that was specified (ZVN2106) on the schematic, so I used this one. This has a much higher voltage threshold and I was wondering if the one that is specked out will switch at a lower voltage from the piezo?

Any help would be greatly appreciated!

Jman
  Reply With Quote
Old 5th March 2009, 11:39 PM   #3
jman 31 is offline jman 31  United States
diyAudio Member
 
jman 31's Avatar
 
Join Date: Oct 2008
Location: Florida
It occurred to me also that the diode is interfering with my voltage. Is there another way to protect this circuit and not lose the precious voltage? And is my reasoning sound on this? I can't have the voltage from the battery getting back to the piezo. Also can the current even go that way through the transistor? Oh my head is starting to ache!
  Reply With Quote
Old 16th February 2010, 11:27 AM   #4
diyAudio Member
 
Join Date: Feb 2010
So did your LED trigger work?
  Reply With Quote
Old 2nd March 2010, 01:44 PM   #5
jman 31 is offline jman 31  United States
diyAudio Member
 
jman 31's Avatar
 
Join Date: Oct 2008
Location: Florida
Quote:
Originally Posted by BenLucid View Post
So did your LED trigger work?
Not as shown above. Have a look here to see the progress.

I am now in the process of building a midi trigger for drum lights. You can read about it HERE and HERE.

You may have to register to see the pictures. Sorry to send you to another site, but I can't begin to reproduce all of the info here.
  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
Adding a 12V power trigger switch to Electrocompaniet Power Amp maxzimum Solid State 0 11th April 2008 02:54 PM
Piezo Transducer Trigger 4A Analog Simmons Drum Module modorange Instruments and Amps 8 21st December 2007 05:23 AM
Main on/off switch for amp using a piezo switch using_e Solid State 13 20th June 2006 06:55 PM
piezo switch? garbage Parts 5 31st July 2005 07:06 PM


New To Site? Need Help?

All times are GMT. The time now is 10:06 PM.


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