Author |
Message |
battleass
Joined: Mar 22, 2011 Posts: 4 Location: portland
|
|
Back to top
|
|
|
richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
|
|
Back to top
|
|
|
battleass
Joined: Mar 22, 2011 Posts: 4 Location: portland
|
|
Back to top
|
|
|
richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
|
Posted: Wed Mar 23, 2011 7:29 am Post subject:
|
|
|
battleass wrote: | so would I be able to run the front end schematic straight into this schematic and be able to have a piezo triggerable envelope generator? |
My front end replaces the MFOS front end. The rest of that circuit will function with a single-supply '324.
Quote: | and would I be able to use the LM324 ic for the op amps on the ar generator? |
As long as you keep the Attack time short. Both front-ends produce an approximately 10mS pulse, which won't be enough time for the envelope capacitor to fully charge if the Attack pot is set for a long time. The pulse duration can be lengthened in my front end by increasing the .01 cap, and/or increasing C2 AND C3. With too long a duration, though, the percussive quality will be lost.
Quote: | one last question is the external trigger in the front end schematic not neccessary for what I am wanting to do with it? |
For bashing away at a piezo you won't need that. It's for my use, to allow manual or sequencer playing. _________________ Revenge is a dish best served with a fork... to the eye |
|
Back to top
|
|
|
battleass
Joined: Mar 22, 2011 Posts: 4 Location: portland
|
Posted: Wed Mar 23, 2011 4:26 pm Post subject:
|
|
|
I'm confused so I do need to use the mfos schematic but just change the front end part to the schematic that you gave me? |
|
Back to top
|
|
|
richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
|
Posted: Thu Mar 24, 2011 2:26 am Post subject:
|
|
|
Sorry. You asked how to make the MFOS circuit work on a single supply.
Change the LF444 to an LM324 with the changes I show to the front-end, U1-A.
Sometimes I give too many choices. _________________ Revenge is a dish best served with a fork... to the eye |
|
Back to top
|
|
|
battleass
Joined: Mar 22, 2011 Posts: 4 Location: portland
|
Posted: Thu Mar 24, 2011 12:35 pm Post subject:
|
|
|
alrighty sicker
thanks a lot I couldn't have figured this out without ya |
|
Back to top
|
|
|
pyrek
Joined: Mar 08, 2011 Posts: 5 Location: sweden
|
Posted: Thu Jun 06, 2013 7:17 am Post subject:
|
|
|
Hi!
The single supply solution with LM324 was just what i was looking for. Thanks a lot richardc64, few people are that helpful
I have 1 question tho, i want to use the drum trigger for the arduino (only the frontend for now), do i need to modify the circuit to make sure the trigger pulses don't exceed arduino's 5 volt limit? |
|
Back to top
|
|
|
richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
|
Posted: Sat Jun 08, 2013 3:36 pm Post subject:
|
|
|
pyrek wrote: | Hi!
The single supply solution with LM324 was just what i was looking for. Thanks a lot richardc64, few people are that helpful
I have 1 question tho, i want to use the drum trigger for the arduino (only the frontend for now), do i need to modify the circuit to make sure the trigger pulses don't exceed arduino's 5 volt limit? |
Sorry, I didn't see this sooner.
The LM324 will work with 5V supply. (See the DS7 schematic elsewhere.) Alternatively, if powered by 9V the output can be limited with a series resistor and a 4.7volt zener diode. _________________ Revenge is a dish best served with a fork... to the eye |
|
Back to top
|
|
|
pyrek
Joined: Mar 08, 2011 Posts: 5 Location: sweden
|
Posted: Sun Jun 09, 2013 12:56 am Post subject:
|
|
|
great! thx again ))
now i must go check out the ds7 almost forgot about it hehe |
|
Back to top
|
|
|
|