Differences

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--- projects:series_00:build:errata [2016/09/05 20:44]
dieters created
+++ projects:series_00:build:errata [2016/09/05 20:55]
dieters
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-====Errata====
+====== Errata ======
+===== Isolate speaker cinch socket =====
+Any contact between the outside of the Cinch connector (speaker connector) and the metallic housing creates a short circuit on the audio amplifier output. Luckily, the audio amplifier has short circuit protection so there is no damage to be expected, but the audio signal is shut off.
+Either increase the opening in the housing back plate, or slip a short ring of heat shrink tube between connector and housing.
+===== AD converter P/N and voltage divider =====
+Resistors R1 and R2 have been mixed up in the bill of material, These two resistors build the voltage divider for the A/D converter. Correct is R1=10k and R2=120k.
+{{ :playground:electrical_tests:schematic_ad_converter_.png?direct&400 |}}
+The bill of material and schematic referenced ADS1110 as A/D coverter, but gave a Farnell P/N for ADS1100. The ADS1100 works, but with slightly lower accuracy and a different scaling factor in ''\opt\conf\sensord.conf''.  For the ADS1100 calibration factor is around 736, for the ADS1110 and its internal reference expect a calibration factor of around 1200.
+===== Sensorboard PCB tracks too close to mounting hole =====
+On the first sensorboards produced one PCB track is too close to mounting holes of the POM block. The installed M2 nut and washer can create a short circuit to ground and shutdown I2C communication. This can be easily fixed with an isolated washer (or a drop of Epoxy).
+{{ :projects:series_00:build:sensorboard_washer.jpg?500 |}}
+===== Misleading Fotos in the Assembly Guide =====
+[[projects:series_00:corrigendum|List of wrong fotos]] in the assembly guide (Unfortunately the original document is missing!)
+Go to [[projects:series_00:build:setupguide|Setup Guide]]