Weird gate

[Kipper4]

Still hacking.
Join in if you like.

[duck_arse]

what does your circuit diagram look like at the moment? it been three pages, after all.

[Kipper4]

gate version 103

op amp lm358
super bright blue 5mm leds
im getting a distorted output like a gate after a distortion on most setting but it gates quite well
thanks

[garcho]

what's pot 4 doing? it looks like it's making a low pass filter with C6. and what's the point of R1?

[Kipper4]

Thanks Garcho. That was just the impetus I needed and the information to push this project on further.
So Now I have a low parts count gate that works on the breadboard.
Thanks everyone.



check it out.

[deadastronaut]

cool, glad you persevered with this...

hows the adjustability?...threshold?...demo?

[Kipper4]

The 500k sens has been renamed pad.
The 1M has been renamed Decay.
Flat out on the decay gates so as no signal gets through except a distorted sound. It's not without its problems I admit.
It's best to set the pad and decay to nothing to start off. This I assume charges up the charging cap C5.
It was a stroke of luck Garcho asking what the pot did it made me rethink, I remembered reading that a resistor across the charging cap changed the time it takes to charge /discharge.
I tried it with 2n7000 that works too but the on off of the mosfet switch is abrupt and falters.
You can change the value of C5 I found a 33uf the most useful because it allowed the note to decay more naturally before the gating.
I've not yet done trials with buckers. And only a small trial with 1 distortion pedal. There's more work to do to refine it I'm sure.
But it's low parts count. It gates.
I'm amazed I got it going with only a week or twos work.
I has a slight swell on some settings too.
I've just completed my perfboard s when I can I'll do a demo.
Thanks for the interest.

[Kipper4]

I'm happy with this now. Just trialed it at a decent volume and it's stella.

Theres no gate control, just a pad to pad down incoming signals and a decay pot for setting up your decay time.
It will gate once the note or chord dies away. How quick depends on the decay and pad settings.
If the decay is set to max you wont hear anything because the gate is always closed.I plan to remedy this with a series resistor on the decay pot somewhere in the region of 50-100ohms i will do some trials.
There you have it a simple to build noise gate with low parts.
Please leave a report here if you breadboard it or build it.
I have a verified perf board layout if anyone wants it.
Rich

[Kipper4]

further experimentation shows that a resistor in series between gnd and the decay pot stops the horrible fizzy sound i was getting when the decay pot is set to minimum decay.
i tried from 50 ohms up and i've settled on a 2k7. I'm sure other values will work too.

A further observation is that it will work with 1n914 instead of the leds. Itried some bat41 schottkys and they even worked. although not as smooth as the leds so im sticking with those. Leds in use 5mm blue (not the super brights) the ordinary ones.
Yep another senior moment. I forget the proper term for normal ones.

[Kipper4]

I'm thinking I'll rename this Down Time.
As that's more how it feels. The gate shuts when play stops.
I'll try to do a demo tomorrow guys.

[deadastronaut]

cool name DT.  like it.

look forward to the clips man..

[Kipper4]

Quickly demo

https://youtu.be/IQYkiPgUNHI

[pinkjimiphoton]

god, i hate this new net bullshit... graphics of course gone, and youtube says the vid doesn't exist.

glad ya got it workin rich, if ya would be willing to share what ya finally came up with, would love to see it.

i thought it was hotamp's noisegate. i remember whipping up a vero a couple years ago, it didn't work so i circle filed it.

i haven't revisited techniguitarre in a long time, maybe i should go back and have a looksee.

glad ya persevered bro!

[Kipper4]

I'll pm you Jimi.
When I get home from vacation .

[pinkjimiphoton]

thanks rich!!
enjoy the time away!

[thermionix]

No Down Time while on vacation?