i just connected the ground but not working
i am afraid to connect also the + of the board to the 5v of arduino
i think the + on the board it's a 5v power supply for an external receiver as stated on description:
Input power: 7.4V, max 1.3A
** Control signal input: front and back remote signal input (including 5V power supply)**
Battery low voltage protection: if the battery voltage is below 6.0V, the smoky exhaust pope will give out a short and a long flame signal and stop to give out smoke
Oil shortage overheating protection: when the oil is insufficient, the smoke will be thin; when the smoky exhaust pipe is overheating, the circuit will stop working and the smoky exhaust pipe will stop fuming. At the same time, the smoky exhaust pipe will give out slow-flashing flame signal until the temperature drops
Flame simulation: if the accelerator is larger, the flame flashing frequency is higher; when the generator is at idle, the flame flickering frequency is slow
Smoke simulation: if the accelerator is larger, there is smoke giving out; when in idle mode, only a little smoke is generated
It lasts 20 to 30 minutes when filling up the tank