product description:
Operating voltage: 5V-15V
Duty cycle adjust range: 5%-95%
Products wiring:
Positive and negative power supply: VCC GND.
Output signal EN, CLK, DIR; signal output common anode connection
Dir: stepper motor direction signal. Signal output when the direction switch to the left.
Clk: stepping clock signals. For the open collector output.
En: Enable / off signal, allowing the choice of a short circuit of the output voltage, no voltage output is disconnected.
Product set and Adjustment:
As shown, DIP 3 is ON, 4 is OFF, this module is for astable pulse generator,
When adjusting the duty cycle does not influence the frequency. Duty cycle adjustment approximate range: 5% -95%, the duty cycle is different at different frequencies.
Fourth gear frequency bands to choose , three capacitors are 103,473 and 104.
DIP 1 and 2 are OFF, the high frequency :
F = 1.443 / (RA + RB + R) * C0 = 3.4- 6.6KHZ
DIP 1 ON, 2 to OFF, the Intermediate frequency:
F = 1.443 / (RA + RB + R) * (C1 + C0) = 600-1200KHZ
DIP 1 OFF, 2 ON, low frequency :
F = 1.443 / (RA + RB + R) * (C2 + C0) = 300-600HZ
Dip 1 and 2 are both ON, second low frequency:
F = 1.443 / (RA + RB + R) * (C2 + C1 + C0) = 200-400HZ
Note: The frequency of the theoretical value, the actual capacitance and resistance error, frequency error, the calculation does not consider the impact resistance of two diodes require a lower frequency when the capacity of the capacitor can be replaced, the capacity increased by 10 times the frequency will be reduced. 10 times.
When DIP 3 OFF, DIP 4 ON, this module is a delay trigger switch. When the time needed to replace long is larger capacitance.
Package: 1x NE555 Pulse Generator
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