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freeDSP - an open source 2-in 4-out digital crossover board
freeDSP - an open source 2-in 4-out digital crossover board
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Old 18th April 2019, 06:40 PM   #341
basreflex is offline basreflex  Spain
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Join Date: Oct 2007
Cyberpit-san
nice, here is an example of turn-on mute. the PNP emitter net is connected to the input voltage before the regulator. upon connection of the supply, the PNP -NPN pair acts as a triac and latches on, until the line MUTEDRIVE is pulled low.
the mutedrive net can be driven by the MPx port, when programmed as a timer delay when the DSP starts executing. monitoring the voltage across the regulator could also warn for turn-off and trigger the mute again.
for example by monitoring a voltage generated by a pnp transistor across the regulator and converted by the AUX adc..
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Old 20th April 2019, 05:19 AM   #342
CyberPit is offline CyberPit  Japan
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Join Date: Apr 2018
Default New Muting Tr. Driver Circuit

Hi basreflex-San,


Thanks a lot.

Well, there are many ways to detect the power issues.
My DSP code is not so reliable, so I would go with HW solution rather than SW.
Additionally reason is keeping free limited ADAU1701HW(MPxx) resources .



Here is my current muting driver circuit.
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Old 3rd May 2019, 06:08 AM   #343
CyberPit is offline CyberPit  Japan
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Join Date: Apr 2018
Default 2way Amp Installation

Hi all,

Current Status is still in evaluation...
DIY DSP PROCESSOR PROJECT PAGE

HILO
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File Type: jpg biampinstallation.jpg (212.8 KB, 99 views)

Last edited by CyberPit; 3rd May 2019 at 06:12 AM.
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Old 3rd May 2019, 06:22 AM   #344
basreflex is offline basreflex  Spain
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nice chassis,where did you buy that ?
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Old 4th May 2019, 02:13 PM   #345
CyberPit is offline CyberPit  Japan
diyAudio Member
 
Join Date: Apr 2018
Quote:
Originally Posted by basreflex View Post
nice chassis,where did you buy that ?
That's recycled junk chassis.
Originally used in MP3 paging player. Not in sale now...
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