8086 controls the rotation of the motor, but the three indicator lights do not light up. Is it because the voltage is not enough? Or is the protection resistor too large?

8086 controls the rotation of the motor, but the three indicator lights do not light up. Is it because the voltage is not enough? Or is the protection resistor too large?

When controlling motor rotation, if three indicator lights are set but they do not light up, there may be several reasons:
1. Insufficient voltage: Make sure that the voltage supply required by the motor and indicator lights is stable and sufficient. Check whether the power supply voltage meets the requirements and make sure there is no obvious fluctuation or drop in the power supply voltage.
2. Protection resistor is too large: If a protection resistor is used to limit the flow of current through the indicator light, make sure the resistance of the resistor is appropriate. If the resistance of the resistor is too large, the indicator light may not light up or be dim. Check that the resistor value is suitable for the indicator light and supply voltage used.
3. Circuit connection problem: Check whether the circuit connection is correct, including the connection between the motor, indicator light, power supply and controller. Make sure all connections are correct and there are no loose or short circuits.
4. Control signal problem: Check whether the control circuit and signal are correct. Make sure the control signal is sent correctly to activate the indicator light. Check whether the source and receiver of the control signal are working properly.
5. Other faults: If no problem is found in the above inspections, there may be other faults, such as component damage, line disconnection or other circuit problems. In this case, it is recommended to check the working status of the circuit and components, or to ask professionals for troubleshooting.
Please note that these are just some common causes and specific issues may require more detailed inspection and analysis. If you are not sure how to solve a problem, it is recommended to seek help from an electronics engineer or professional technician.