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Messages - pgodfrin

#16
well duh, the soldering iron ! I turn it off and a lot of the noise goes away...
#17
Yeah the cell phone thing really had me going once at a live recording, pretty much ruined the quiet parts. At first I thought it was a major duty wifi signal, but next time I raised the stand a foot or so higher and it went away!

Anyway in my case, I have both fluorescents AND led... I was hoping there was an easy way to shield the unit or add some noise controlling to the jacks or something like that...
#18
yep. dang.
#19
Howdy Folks,
Is there a way to avoid the RF noises when bench testing a circuit?
thanks,
pg
#20
I was play testing it today, and it needs a buffer. I have 3 or 4 pedals before it today - yep - buffer...
#21
Howdy folks! Now I know why checking the voltages is useful. I found that pin 7 on IC1 was really unstable, which led me, along with an audio probe, to a cap. Not sure what the issue was, it measured 1.4 uF (for a 1uF elec) but I replaced it. Voila - got a better signal. Replaced the IC as well and I got a working device. Which really made me happy since this was a pcb design I did myself in eagle from a schematic of the Klon Centaur.

I'd like to refine my etching process, as I found a couple teeny weeny flakes of copper causing shorts. One thing I've been doing is giving more space between the leads, which helps a lot. But, this pcb had so many parts I was forced to compress it a little.

Anyway, all's well that ends well!
peace,
pg
#22
OK Folks, it works! And then it doesn't. Then it works! Really weird I'm not moving it when it stops, it almost seems like something gets hot and it stops, or expands a solder joint? Or maybe a cap is being overloaded? I don't even know what that sounds like, lol.
Anyway, I'll do the usual, check all the solders and reflow where obvious. I'll get the voltages soon enough.
In the meantime, anyone ever hear of something like this?
#23
Tech Help - Etcher's Paradise / Re: Egodriver help...
December 07, 2020, 01:17:07 PM
Well, nuthin' doing. It won't work. I did find a tiny, teeny weeny piece of copper  that caused a short to ground, but I still got nothing after fixing that. And between all the desoldering and scraping I totally macked up the board. So... I'm going to try again. Maybe this time I'll use the schematic to design my own version... I'll call it SuperEgo :). Now all we need is a pedal called Id!
#24
Tech Help - Etcher's Paradise / Re: Egodriver help...
December 06, 2020, 02:43:02 PM
OK, thats what I thought as the datasheet shows pin 1 as the output. I'll post the voltages later today.
One question about the voltages - how do I calculate what they should be? Is that simply Ohm's Law or is it something else?
#25
Tech Help - Etcher's Paradise / Egodriver help...
December 06, 2020, 04:45:46 AM
OK, got it etched and built. I have a signal on pin 3 of the TL082. I should have something out of pin 2 heading to gain,  but I don't.
arrrrrrrrgh please help. Wh am i missing?
#26
OK, well I think I cleared it up by re-flowing,...!
#27
Well, back to the drawing board. I've reworked the schematic and pcb, in the process of reviewing it. There's so many components in this one, but I managed to get it down to 2x2.75 inches - and yes - two jumpers...
sigh.
#28
Howdy Folks! I'm working on an ROG Uno from the schematic. It works, but when I turn up the bass or mid pot there's a strange tremolo effect. I am double checking the solder and components, but I don't know what I'm looking for with this particular problem.

Any advice oh etching wonders?
#29
Yeah that makes sense, I checked most everything. No voltages as there are no docs. I'll go back in again...
:)
#30
Not sure where to look next, any one have any ideas?