The main chip: LM358
Input voltage: 5V – 12 VDC
Input current: ≥ 100 mA
The output amplitude: close to the input voltage
The range of adjustment frequency: 0.07 HZ – 2 kHZ (also cycle in the range of from 0.45 ms to 15s).
Setting range duty cycle: 0% to 100%
Output current: 500 mA, output can directly power small relays or small motors
1x Generator of rectangular waves with adjustable frequency NE555 LM358