Hello,
I think my Uno R3's "Analog In" pin 0 is faulty (possibly pin 1 aswell).
I've tested each Analog In pin by connecting it with a jumper wire to: nothing, Gnd, 3.3V and 5V.
I used the File -> Examples -> 0.1Basics -> ReadAnalogVoltage sketch (changing which pin to read) to get the following values.
| Analog | Empty | Gnd | 3.3V | 5V |
|---|---|---|---|---|
| 0 | 2.45 | 1.87 | 2.62 | 3.04 |
| 1 | 4.82 | 0.00 | 4.82 | 5.00 |
| 2 | 4.70 | 0.00 | 3.38 | 5.00 |
| 3 | 4.70 | 0.00 | 3.38 | 5.00 |
| 4 | 4.70 | 0.00 | 3.38 | 5.00 |
| 5 | 4.70 | 0.00 | 3.38 | 5.00 |
Is there any hope for the A0 pin? Do I need to buy another Uno?
Andrew
