Help! - JHS Angry Charlie Build not Working

[GreySuits]

This is my second pedal build,  I built it based on the following Veroboard layout:


http://tagboardeffects.blogspot.com/2018/10/jhs-angry-charlie-v3.html?m=1

When I plug it in to my amp I get no sound what so ever.  Clean guitar works when the switch is off so I don't think the issue is with the jacks or the switch.

I'm getting power to all the pots except for the volume pot.  It looks like the current dies when it hits the 2 3mm LEDs.  I got a reading of 0.005v from the link going into the first LED and 0's on the way out, nothing on the second LED and nothing on the link out.  I know the LEDs are getting power and are working because they will flicker when I'm taking reads off the tone pot, and the first one will light up when I make a bridge to a link with a higher voltage.  My meter only has a 9V and a 1.5V meter setting and only goes to the 0.000 volts so there may be power getting there I just cant measure it with my meter.

Here are pics of the build:





Thank you for any help you can give!

[KarenColumbo]

You happen to have a schematic of this particular circuit? Would help untangling this build quicker

[GreySuits]

I think it is based on this one, but I'm not sure if the person who made the Veroboard layout made any adjustments.




https://www.pedalpcb.com/docs/AngryCharles.pdf

[duck_arse]

welcome to the forum, GreySuits, but we can't see those images - you've linked to things inside your googoo account or summink.

[bluebunny]

I concur with my learned friend on both counts. 

[GreySuits]

welcome to the forum, GreySuits, but we can't see those images - you've linked to things inside your googoo account or summink.

Hmm. For some reason I can't get the photos to work with any hosting site.  Do you guys know any that work?

[paul.creedy]

imgur ?

[GreySuits]

imgur ?

Thanks!  I think that worked, but the images are huge now.

[GreySuits]

Played around with it a little more, taking a voltage reading on C16 the voltage on the positive lead is 4.5v, the voltage on the negative lead is 0, so it looks like this is where the voltage drop issue is occurring.

I swapped out the capacitor and still had the same issue.  I flipped the capacitor around and now get a 4.5v reading on the negative lead and a 0.8 voltage reading on the positive lead.  I also now get a voltage reading on the volume pot, but the effect still does not work.

[bluebunny]

Thanks!  I think that worked, but the images are huge now.

You can put height=nnn or width=nnn inside the opening [IMG] tag to make it a reasonable viewing size (but remember, the whole image is still downloaded).  We can click on the image if we want to see it in all its huuuge glory.  So like this, for example:



(Click "Quote" to see my markup.)

[Elijah-Baley]

It's your second build, ok. Maybe it could be still a bit hard for a beginner.
Anyway, I can see the photos, and the the soldering is not so clean, I can see at least a pair of possible bridge between the stripes.
If your are sure that every components and every wires are soldered in the right spot you should try to pass a knife between the stripes, where you suspect there is some unwanted contact because the soldering. To be sure check the continuity between the stripes.

[duck_arse]

two ways around huge images - resize first, then upload/post  - or - use the options at imgur - they will resize the image and give a different link for each size. poke around there a bit, I think. I allays resize first.

[diydave]

Anyway, I can see the photos, and the the soldering is not so clean, I can see at least a pair of possible bridge between the stripes.

I see quite a lot of possible soldering issues. Left, right and in the center of the board.
It's possible that even if you get the voltages right, you can have issues with the signal.

[EBK]

What are your voltages at each IC pin?  Did you triple check to make sure those tantalum caps are oriented the right way?

[willienillie]

[GreySuits]

It's your second build, ok. Maybe it could be still a bit hard for a beginner.
Anyway, I can see the photos, and the the soldering is not so clean, I can see at least a pair of possible bridge between the stripes.
If your are sure that every components and every wires are soldered in the right spot you should try to pass a knife between the stripes, where you suspect there is some unwanted contact because the soldering. To be sure check the continuity between the stripes.

Thanks, I didn't think about checking the continuity between stripes, basically if there is no link between the stripes there should be some resistance when I check it with my meter correct?  So if I get a reading of 0.0 ohms that probably means that I have a contact?

Thanks for the help! 

[GreySuits]

What are your voltages at each IC pin?  Did you triple check to make sure those tantalum caps are oriented the right way?

I can post voltages from the ICs later tonight. 

I think I have the Tantalum caps oriented correctly (with the longer lead as the positive as well as + sign on the cap).  However, I was not getting any voltage out of the negative lead on C16 when I had it oriented correctly but once I flipped it (to which should be the wrong way with the + sign on the cap going towards the negative side connecting to pin 7 of the IC, I actually get a voltage reading now.  But I dont know if that is correct.

[EBK]

I had it oriented correctly but once I flipped it (to which should be the wrong way with the + sign on the cap going towards the negative side

Once you have double checked that a part is oriented the correct way, there should be no reason to intentionally try flipping it around the wrong way.  You may end up damaging something that wasn't damaged before.

[GreySuits]

Voltage on the ICs:


TL072
1: 4.59
2: 4.59
3: 0.12
4: 0
5: 4.59
6: 0.02
7: 4.83
8: 9.20


Lm833
1: 4.86
2: 4.86
3. 0.0
4: 0.0
5: 9.21
6: 0.0
7: 0.14
8. 9.2


Pots (highest lead with the Pot on full to 3)
Treble: 4.89
Mid: 0.91
Vol: 0.0
Drive: 4.87
Bass: 0.37

[GreySuits]

I had it oriented correctly but once I flipped it (to which should be the wrong way with the + sign on the cap going towards the negative side

Once you have double checked that a part is oriented the correct way, there should be no reason to intentionally try flipping it around the wrong way.  You may end up damaging something that wasn't damaged before.

Thanks flipped it back to the plus on the cap going the correct way.