¶ Missing Components
A few components were not loaded during assembly at Screaming Circuits.
¶ Vin Wire
Solder a wire between the Vin pads. The length of the wire is 17 cm for VIN. For VINrtn it is a bit shorter, as can be see in the picture below. Make sure to leave space for the mounting hole.
The picture is from the 20190718 version.
¶ Errata
¶ Updating Range of Variable Loads
A 100mΩ resistor should be used instead of 25mΩ to set the load current to reduce the sensitivity to mV level noise. The DAC voltage divider is already updated. This was a mistake in the BOM.
Replace all 2512 sized resistors (R307, R314, R319, R324, R407, R414, R419, R424, R507, R514, R519 and R524) with 100mΩ.
¶ Fixing qwiic wires
The pinout of the I2C6/a/b Qwiic connectors on the active board is not the standard Qwiic pinout. The Qwiic cable needs to be modified when connecting to external I2C devices. The modifications are as follows.
| Active Board | Qwiik Accessory |
|---|---|
| Blue | Black |
| Yellow | Red |
| Red | Blue |
| Black | Yellow |
See example picture below (left side of the Qwiic cable connects to active board).
