The power supply voltage is dc 9V/3A, which is positive inside and negative outside. It is better to use a switching power supply with small ripple first. If the voltage exceeds 9V, it may be due to heatingLarge and burnt high adjustment motor. The current of high-speed machine is 0.5~2.5A, and the speed can be adjusted according to the load of generator.The output voltage of the generator is 2.5~10V, and the maximum output current is 1A The generator has 3 output terminals, which can be used as a voltmeter and load. The on-board lamp beads indicate the power generation status. The high-speed motor M1 drives M2 to rotate, the generator coil cuts the magnetic line of force, and the mechanical energy is converted into power supply. The maximum voltage is about 9V. C4~C6, T1 filter the power ripple generated by the generator; S2 starts positive and negative pole switching. When the upper positive pole is switched to the lower negative pole, the power supply generates a stable voltage of 2.5~6V through IC2 to provide a stable voltage for the load. The increase of M1 speed will not change the output voltage. The green indicator light is on, indicating the voltage stabilization state. Color: Green Material: plastic Specification: AC Package Contents: 1*DC/AC generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.