nate433
Member
Hey everyone. I've yet to have a PLL pedal work properly. They never seem to quite have the same amount of sustain as the demos I see online. At this point I've probably built 150+ pedals and the only ones that don't work properly are DBA ones that have hard to source parts (looking at you Robot Fuzz...) and the 3-4 PLL pedals I've made.
I've taken a bunch of voltage measurements of the 2 I currently have, a Bit Commander and Data Corrupter. A lot if not most of the '0' measurements was sometimes like .01 mV. So figure that's pretty negligible. I wasn't sure if there were certain knob positions you should have to get the best readings. So I just left everything at noon.
All of the chips were sourced at Tayda, and I've swapped most if not all of them in the past with others I had lying around and it didn't make a difference.
On a somewhat related note, how do you know if the voltages are what you should expect? I don't see anything on the datasheet. Is it just experience and knowing how the chips need to function for the pedal to work? Or are you like analyzing it in LTSpice or probing a known working pedal. I would love to be able to understand what the readings mean without needing to ask you all for help. It is greatly appreciated though.
Thank you in advance!
Bit Commander
Data Corrupter
I've taken a bunch of voltage measurements of the 2 I currently have, a Bit Commander and Data Corrupter. A lot if not most of the '0' measurements was sometimes like .01 mV. So figure that's pretty negligible. I wasn't sure if there were certain knob positions you should have to get the best readings. So I just left everything at noon.
All of the chips were sourced at Tayda, and I've swapped most if not all of them in the past with others I had lying around and it didn't make a difference.
On a somewhat related note, how do you know if the voltages are what you should expect? I don't see anything on the datasheet. Is it just experience and knowing how the chips need to function for the pedal to work? Or are you like analyzing it in LTSpice or probing a known working pedal. I would love to be able to understand what the readings mean without needing to ask you all for help. It is greatly appreciated though.
Thank you in advance!
Bit Commander
| PIN | IC2 - CD4024BE |
| 1 | Stars at ~2.5V and drops |
| 2 | 0 |
| 3 | 1.2mV |
| 4 | 1.9mV |
| 5 | .9mV |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | .6mV |
| 14 | 9.62V |
Data Corrupter
| PIN | IC2 - CD4069UBE | IC3 - CD40106BE | IC4 - CD4024BE | IC6 - CD4046BE | IC7 - CD4017BE | IC8 - CD4017BE |
| 1 | 4.513V | 4.481V | 9.32v | 9.36V | 4mV | 0 |
| 2 | 4.528V | 4.503V | 0 | 0 | 4mV | 0 |
| 3 | 4.470V | 9.26V | 0 | 0 | 2.6mV | 9.35V |
| 4 | 4.50V | 1.1mV | 9.35V | 9.36V | 2mV | 0 |
| 5 | 4.494V | 0 | 9.35V | 0 | 9.35V | 0 |
| 6 | 4.506V | 9.31V | 0 | 0 | .7mV | 0 |
| 7 | 0V | 0 | 0 | 3.651V | 0 | 0 |
| 8 | Starts at .3 | 9.3V | 0 | 0 | 0 | 0 |
| 9 | 0 | 0 | 0 | 1.02V | 9.35V | 0 |
| 10 | 5.3mV | 0 | 0 | 46.5mV | 0 | 0 |
| 11 | 0 | 0 | 9.35V | 0 | 0 | 0 |
| 12 | 5.5mV | 0 | 9.35V | 8.02V | 0 | 9.35V |
| 13 | 0 | 0 | 0 | 0 | 0 | |
| 14 | 9.35V | 9.33V | 9.36V | 9.35V | 9.31V | 9.35V |
| 15 | 0 | 0 | 0 | |||
| 16 | 9.35V | 9.35V | 9.35V |
