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== Duet 3 Toolboard 1LC == 




{{:bdev:screen_shot_2022-10-03_at_7.04.49_am.png?600|}}


OUT_0, OUT_1 and OUT_2 are PWM-capable


| My mod | Connector (board revision) | Label | Function |
|  | 4-pin JST PH | IO_0 | Input/output with +5V power, for endstops, Z-probes. Input is 30V-tolerant | 
|  | 3-pin JST PH | IO_1 | Input/output with +5V power, for endstops, Z-probes. Input is __3V-tolerant__ | 
|. | 3-pin JST PH | IO_2 | Input only with +5V power, for endstops or tool pickup detection switch. __Input is 30V-tolerant__  |
|  | 1 x 3-pin footprint | IO_3 | (v1.1 board) Footprint to mount an Omron D2FD-1L30-1T ultra subminiature switch or similar. In v1.2 and v1.3 the footprints for an ITR20001/T or TCRT1000/1010 reflective optical sensor are also added.Example use case is a tool docking confirmation switch.| 
| Extruder motor | 4-pin JST PH | DRIVER_0 | Stepper motor connection |
| Extruder thermistor | 2-pin JST PH | TEMP_0 | Thermistor or PT1000 input. TEMP_0 uses a 16-bit ADC for high resolution reading of PT1000 sensors  | 
|  | 2-pin JST PH | TEMP_1 | Thermistor or PT1000 input  | 
| Extruder heater | 1 x Screw terminal | OUT_0 | High current output intended for extruder heater, maximum current 5A, this is VIN voltage only. There is no flyback diode on this output, so if you connect a high-current inductive load, you must use an external flyback diode.|
| Extruder fan | 4-pin JST PH | OUT_1 | 4-wire fan output (also accepts a 2- or 3-wire fan) intended for use as the print cooling fan. 2A total max current for OUT1 and OUT2 when VIN selected (v1.1 board), 0.8A total max current for OUT1 and OUT2 on 12V. This output is protected by a flyback diode. Note On v1.0 boards and earlier, VOUT on OUT_1 and OUT_2 is set to 12V. On v1.1 boards, voltage is selectable between 12V and VIN, using VOUT for OUT_1, OUT_2 pins. Note When using a 4-wire fan, the tacho reading is valid at all PWM settings. | 
| Extruder blower | 3-pin JST PH | OUT_2 | 3-wire fan output (also accepts a 2-wire fan) intended for use as the hot end fan. 2A total max current for OUT1 and OUT2 when VIN selected (v1.1 board), 0.8A total max current for OUT1 and OUT2 on 12V. This output is protected by a flyback diode. Note On v1.0 boards and earlier, VOUT on OUT_1 and OUT_2 is set to 12V. On v1.1 boards, voltage is selectable between 12V and VIN, using VOUT for OUT_1, OUT_2 pins. Note the tacho reading is valid only when running the fan at full speed.|
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