Germany
Asked — Edited
Resolved Resolved by Jeremie!

Soundboard Ticking-Noise Scriptcode - Energy Pulse

Dear Synthiam Crew and Friends,

its an old problem since the beginning of EZB.

The Ticking/ Clicking-Noise from the EZB and various speaker. you can hear the noise non stop. I dont mean a click noise at the beginnig or end of a sound!

If you turn off all sounds from the EZB-startup and network connection you can use 24 Servos and all sensors without a clicking or ticking noise in the speaker. but if you use the "EZB-Soundboard" or a Startup-Sound and one time the speaker you hear the clicking/ ticking noise the whole time. the noise is non stop.

So I want to ask for a code to get the "speaker status" from the beginning/ startup without any sound. sound conenction off. is it possible? so I can simple use the code after a sound to terminate the clicking or ticking noise from the energy.

I say "the energy", because the clicking changes if I use different batteries or an power unit. from fast to slow, noisy to soft.

cheers Smarty


Related Hardware EZ-B v4
Related Control SoundBoard (EZB)

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PRO
USA
#9  

Sound Amplifier amp datasheet: https://www.ti.com/lit/ds/symlink/lm4902.pdf

this is the amp pinout:

User-inserted image

this is a typical application:

User-inserted image

As you can see the pin Shutdown is activated when a GND is applied to the sound amplifier Pin 1. So applying 0 shutdowns the amplifier, 1 (3.3v) OR floating (not connected)  enables the amplifier.

Germany
#10  

@ptp

perfect. I will try it tomorrow :-)

#11   — Edited

Such an elegant solution.

So if I'm following you, you simply just run one wire from the bottom of R7 straight to any white signal pin of a digital port. Then to shut off the amp you run a script to turn off the connected digital port?

Thanks PTP. You've done it again!

PRO
USA
#12  

Quote:

Then to shut off the amp you run a script to turn off the connected digital port?
Dave, that is correct. You pick the port:)

PRO
USA
#13  

Regarding the WIFI interference:

https://www.ispreview.co.uk/index.php/2015/04/10-top-tips-boosting-home-wi-fi-wireless-network-speeds.html

Quote:

Beacon Interval (milliseconds)

WiFi routers use these beacon signals to help keep the network synchronized and many default to 100ms. Setting a lower (e.g. 50 or 75ms) interval might help your WiFi network to hold its connection with other devices, albeit at a cost to some battery life on other devices. By contrast raising the setting above 100ms could save power but the likelihood of connectivity problems may increase.

I believe this beacon signal in a short period generates/adds up the interference.

Maybe is worth to try changing the EZB to client mode (if not already)

PRO
Canada
#14  

That's a smart solution to silence the amplifier @PTP, I like it!