madbeanpedals::forum

Projects => Tech Help - Projects Page => Topic started by: Flock of Bees on August 08, 2016, 08:58:40 PM

Title: Stutr Fail help
Post by: Flock of Bees on August 08, 2016, 08:58:40 PM
Hello Everyone,

I am having issues troubleshooting this Stutr Build. When the effect is off I have sound from the guitar. Once I push the switch, silence. I took some photos and Have some voltage readings:
IC1:
1: 4.46     2: 4.42   3: 4.24    4: 0.01 
5: 4.24     6: 4.19     7:   4.45    8: 8.85

IC2:
1: varies   2: varies  3: varies  4: 0.00
5: varies   6:  varies  7: varies  8: varies

I re-flowed any questionable joints, no luck. I appreciate any help I could get.
Title: Re: Stutr Fail help
Post by: Flock of Bees on August 08, 2016, 08:59:56 PM
More pics
Title: Re: Stutr Fail help
Post by: darrenw6000 on August 09, 2016, 12:18:58 AM
Is R18 & 19 meant to be empty
Title: Re: Stutr Fail help
Post by: Flock of Bees on August 09, 2016, 12:24:31 AM
according to the build doc, if you do not wish to have the speed indicator (d2) than there is no need to populate R18 and R19.
Title: Re: Stutr Fail help
Post by: HamSandwich on August 09, 2016, 03:20:23 AM
I don't think pin8 of IC2 should be varying. What voltage variance are you getting?
Title: Re: Stutr Fail help
Post by: Flock of Bees on August 09, 2016, 04:54:04 AM
Upon testing again. There is no voltage to pin 8
Title: Re: Stutr Fail help
Post by: m-Kresol on August 09, 2016, 08:15:16 AM
you should have your supply voltage on pin 8. As your LFO is working apparently (varying volages on the other pins) you must have voltage there. So please check again; it should be a steady 8.something V.

Do you have an audioprobe? there's a new tutorial how to make one and you could trace the signal to where it stops.