How much current do the train motors use? This table shows the values I measured. The power was provided by a train controller which maintains 9V whatever the load is. If powered by batteries, these values might be lower because the internal resistance of the batteries will cause the voltage to drop.
| Device | Minimum | Typical | Maximum |
|---|---|---|---|
| Train Motor | 70mA | 250mA1 | 700mA |
| Technic Motor | 60mA | 600mA2 | |
| Headlight | 40mA | 40mA | 40mA |
1This value was measured pulling a typical train at full speed.
2According to Will Chapman the Technic and Train motors use the
same part internally so the numbers should match, I guess there is some
variation from part to part.
| Position | Voltage (no load) | |
|---|---|---|
| -6 | Full Reverse | -9.1V |
| -5 | -7.9V | |
| -4 | -6.7V | |
| -3 | -5.4V | |
| -2 | -4.2V | |
| -1 | -3.0V | |
| 0 | Off | 0.0V |
| 1 | 3.0V | |
| 2 | 4.2V | |
| 3 | 5.4V | |
| 4 | 6.7V | |
| 5 | 7.9V | |
| 6 | Full Forwards | 9.1V |