NE555 Pulse Module Upgrades LM358 Module Duty Cycle Frequency Adjustable

Features: 1. Used as a square wave signal generator to generate square wave signal for experimental development and use. 2. Square wave signal used to generate stepper motor drive. 3. Generate adjustable pulse for MCU usage. 4. Generate adjustable pulse to control the relevant circuit. Description: 1. Size: 3.5CM * 3.67CM 1. The main chip: LM358; Input voltage: 5V-12VDC. 3. Input current: ≥100MA; 4. Output amplitude: close to the input voltage; 5. Frequency adjustment range: 0.07HZ-2KHZ (also cycle about 0.45ms to 15s); Frequency adjustment method: There are four short-circuit cap on the board to choose the frequency: Insert 0 short cap, the longest cycle up 0.3 seconds; Insert a short cap, the longest cycle can be adjusted to about 4s; Insert two short caps, the longest cycle can be adjusted to about 7s; Insert three short-circuit cap, the longest cycle can be adjusted to about 10s; Insert four short-circuit cap, the longest cycle can be adjusted to about 15s; 6 duty cycle adjustment range: 0% to 100% (high / cycle); 7. Output current: strip 9012 transistor drive capability, the output current of about 500MA, the output can be directly driven small relay or a small motor;