uO_c 8hp ornament and crime.

[Altitude909]

half of U10 doesnt appear soldered and the top of U4 looks suspect

[Bartimaeus]

anyone in the usa got a spare pcb/panel set?

[emmaker]

anyone in the usa got a spare pcb/panel set?

https://synthcube.com/cart/index.php?ro ... ption=true

[Faye]

Quick question regarding the version 1.1 PCB: In the diptrace file the capacitors C22, C25, C26 and C27 are 330pF, while in the BOM they are 560pF.
Which is correct?

[emmaker]

Quick question regarding the version 1.1 PCB: In the diptrace file the capacitors C22, C25, C26 and C27 are 330pF, while in the BOM they are 560pF.
Which is correct?

Even though the O&C and uO&C are different either. Look at the original O&C schematics.

[Faye]

Thx

[Faye]

So I just finished soldering most components on uO_c. Teensy, screen and hardware are not mounted yet.
First I want to measure some voltages. When I look at the schematics, I'm having a hard time to recognize what is supposed to be a reference voltage exactly. Is it only the voltages labeled with "Aref"? What about "3V3_A (powa)" and "3v3+D" as example? Should my multimeter read 3.3v too on these points at any time when the module is powered?

[emmaker]

So I just finished soldering most components on uO_c. Teensy, screen and hardware are not mounted yet.
First I want to measure some voltages. When I look at the schematics, I'm having a hard time to recognize what is supposed to be a reference voltage exactly. Is it only the voltages labeled with "Aref"? What about "3V3_A (powa)" and "3v3+D" as example? Should my multimeter read 3.3v too on these points at any time when the module is powered?

Schematic isn't done well and sucks (or at least the one I have does). Looking at this saw the node of C20, C19 and R13 isn't connected to VREF_2v5 from U2.

When powered with out the Teensy you should be able to measure:

• +/-12V, about +/-11.4 past the diode bridge.
  +5V
  3V3_A
  AREF_-5, this is from U6

You will not be able to measure:

• 3V3+D - It comes from the Teensy, won't be there until the Teensy is plugged in. Don't forget to cut the power trace on the Teensy before you plug it in.
  V_bias - This will probably won't be there. It's unclear from the data sheet where VREF_2v5 comes from in the DAC8565 (U2). If it needs 3v3+D it won't be there.

Jay S.

[emmaker]

So I just finished soldering most components on uO_c. Teensy, screen and hardware are not mounted yet.
First I want to measure some voltages. When I look at the schematics, I'm having a hard time to recognize what is supposed to be a reference voltage exactly. Is it only the voltages labeled with "Aref"? What about "3V3_A (powa)" and "3v3+D" as example? Should my multimeter read 3.3v too on these points at any time when the module is powered?

Schematic isn't done well and sucks (or at least the one I have does). Looking at this saw the node of C20, C19 and R13 isn't connected to VREF_2v5 from U2.

When powered with out the Teensy you should be able to measure:

• +/-12V, about +/-11.4 past the diode bridge.

• +5V

• 3V3_A

• AREF_-5, this is from U6

You will not be able to measure:

• 3V3+D - It comes from the Teensy, won't be there until the Teensy is plugged in. Don't forget to cut the power trace on the Teensy before you plug it in.

• V_bias - This will probably won't be there. It's unclear from the data sheet where VREF_2v5 comes from in the DAC8565 (U2). If it needs 3v3+D it won't be there.

Jay S.

[Faye]

@emmaker thanks so much for the detailed reply. I'm so glad that I asked, instead of starting to look for bad soldering. In this case, everything is fine on my module and I can proceed with the build. Thank you!