Size: 31mm x 11mm x 23mm/1.21„ x 0.43“ x 0.89„ (inch) (approx) 　 Application scope:

1. Used as a square wave signal generator produces a square wave signal for the experimental development use.
2. A square wave signal is used to produce a stepper motor-driven drive.
3. Produce the adjustable pulse for MCU use.
4. Generates the adjustable pulse to control the associated circuits.

　 Descriptions:

1. The main chip: LM358.
2. Input voltage: 5V-12VDC.
3. The input current: ≥ 100MA.
4. The output amplitude: close to the input voltage.
5. The frequency adjustment range: 0.07HZ-2KHZ (also cycle in about 0.45ms to 15s).
6. Duty cycle adjustment range: 0% to 100% (High / cycle).
7. Output Current: strip 9012 transistor drive capability is strong, about 500MA output current, the output can directly drive small relays or small motors.

Frequency adjustment methods:

1. The board has four the shorting cap can select the frequency.
2. Inserted 0 short-circuit cap, the longest cycle upwards to 0.3 s.
3. Inserted one short-circuit cap, the longest cycle can be adjusted to about 4s.
4. Inserted two short-circuit cap, the longest cycle can be adjusted to about 7s.
5. Inserted three short-circuit cap, the longest cycle can be adjusted to about 10s.
6. Inserted four short-circuit cap, the longest cycle can be adjusted to about 15s.
7. Duty cycle adjustment range: 0% to 100% (High / cycle).
8. Output Current: strip 9012 transistor drive capability is strong, about 500MA output current, the output can directly drive small relays or small motors.