You can simply make a cable where the shielding is soldered to the connector only one side, you know
Probably easier than messing with your pedals.
What you need is that any wire going between two devices has the shield connected only on one side (doesn't matter which one).
You can simply make a cable where the shielding is soldered to the connector only one side, you know
Probably easier than messing with your pedals.
What you need is that any wire going between two devices has the shield connected only on one side (doesn't matter which one).
I did the test only with the two critical pedals, ie the Zoom / Arduino + Wah Wah + a single cable, with shielding connected only on one side, to connect the Zoom output to the input of wah wah but unfortunately the TAP TAP did not go away and it was added even the noise of an airliner parked during taxiing
https://youtu.be/zWUQr6lTicM?t=108
How did you connect the power? Did you use the star grounding?
If you only remove the ground and don't fix the rest, it will not work!
How did you connect the power? Did you use the star grounding?
I used two terminal strips, on one I set the positive of the power and on the other the negative of the power. In the first I then connected the positive of the two pedals and on the other terminal I connected the two negatives.If you only remove the ground and don't fix the rest, it will not work!
"fix the rest"... what do you mean?
Edit:
I mean that I seem to have done as you said or I missed something ?
Now for debugging it - if you remove the Arduino and leave only the pedals setup like this - is it still noisy? (power the Zoom from 9V directly, not through USB).
Now for debugging it - if you remove the Arduino and leave only the pedals setup like this - is it still noisy? (power the Zoom from 9V directly, not through USB).
I do not remember if I wrote it but I think it has already said in some of my message that without Arduino I have no kind of noise, connecting it directly to 9V ( NO USB ) and even in daisy chain. It is its presence in the pedal board the cause of all the strange noises, from the ticking with the PSU switching to the humming at 50 Hz with linear power supply with transformer.
If it isn't noisy like this, unplug power, take your multimeter and measure resistance between the ground of the input plug and the negative power supply wire. It should be very low (ideally dead short).
If it isn't, then the Zoom has separate grounds for the digital and analog parts and you may need to add a grounding connection between the input connector and the star grounding point.
If it isn't noisy like this, unplug power, take your multimeter and measure resistance between the ground of the input plug and the negative power supply wire. It should be very low (ideally dead short).Between the negative of the Power Supply and the input ground i measure about 17 Ohms .
If it isn't, then the Zoom has separate grounds for the digital and analog parts and you may need to add a grounding connection between the input connector and the star grounding point.Signal input connector ?
...connect one grounding wire between the input ground of the Zoom and your star grounding point. That should solve that particular issue.
...connect one grounding wire between the input ground of the Zoom and your star grounding point. That should solve that particular issue.
I understood what you say, to reset the ddp between the two points but connecting the ground of the Zoom input with star ground ( 23 Ohm) i hear a bump from the amp speaker and the Zoom goes off. I immediately terminated the connection for fear of some failure.
Oops. Take your multimeter and measure whether the Zoom doesn't have a voltage between the input signal ground and power ground. That sounds like you have managed to make a short circuit somewhere.
And what is the "ddp"? I don't know that term.
Oops. Take your multimeter and measure whether the Zoom doesn't have a voltage between the input signal ground and power ground. That sounds like you have managed to make a short circuit somewhere.
And what is the "ddp"? I don't know that term.
Ops, I wrote the acronym in Italian --> ddp = voltage (difference of potential)
Anyway, i tried to put two separate power supplies and while I remembered that it did not make noise, instead the noise exists, no tapping but high frequency noise, but only when the wahwah is pressed down (all sounds sharp). At this point, the only solution without noise is a pair of power bank or my dual power supply in which the hum would eliminate it with the mumetal (but uncomfortable).
In my opinion, as you said, i should find a drastic solution. What do you mean by drastic?
Since next week I have to play live, today i tried all the possible power supply combinations that i own and for now i found this quite silent solution: the Truetone for the 4 analog pedals, including the wah wah, and the stock power supply for Zoom G3, placing both in a power strip under the pedalboard, as in this photo http://www.johnhendow.com/wp-content/uploads/2012/04/underside-2.jpg
Given the cable Truetone is quite long and fat I tried to replace it with another Zoom AD16E
https://tinyurl.com/yafgllf5
but I noticed that a noise is generated that I never heard, like the roar of a lion I removed one of the two Zoom AD16E and the I connected it to the wall socket and at that point the lion ran away, instead I would rather keep both in the same power strip