20pcs NE555 Pulse Module LM358 Duty and Frequency Adjustable Square Wave Signal Generator Upgrade Version

Feature 1 Used as a square wave signal generator to generate square wave signals for experimental development 2 Used to generate a square wave signal that drives the stepper motor driver 3 Generate adjustable pulses for use by the MCU 4 Generate adjustable pulses to control the associated circuitry Description 1 Size 3 5CM 4 6CM1 The main chip LM358 2 Input voltage 5V 12VDC 3 Input current 100MA 4 The output amplitude close to the input voltage 5 The frequency adjustment range 0 07HZ 2KHZ that is the cycle is about 0 45 milliseconds to 15 seconds 6 Duty cycle adjustment range 0 to 100 high level period 7 Output current plate with 9012 triode so the driving ability is relatively strong the output current can be up to 500MA the output can directly drive small relay or small motor Frequency adjustment method There are 4 shorting caps on the board to choose the frequency Insert 0 short circuit caps that is all 4 short circuit caps are removed which is high frequency and the period is adjusted to 0 3 seconds Insert a short circuit cap the period can be adjusted to about 4 seconds Insert 2 short circuit caps the period can be adjusted to about 7 seconds Insert 3 short circuit caps the period can be adjusted to about 10 seconds Insert 4 short circuit caps the period can be adjusted to about 15 seconds Package includes 20 x NE555 Pulse Module