Module scope of application:
1 used as a square wave signal generator, generating the Fang Bo signal for the eperimental development and use.
2 square wave signal is used to drive the stepper motor driver.
3 generate adjustable pulse for MCU use.
4 generate adjustable pulse, control the related circuit.

Two, characteristic description:
1, size: 43*36mm
2, the main chip: NE555;
3, input voltage: 5V-15VDC. 5V power supply, the output current can be around 12V; 15MA power supply, the output current can be around 35MA;
4, input current: 100MA
5, the output range: V-PP 11.4V to V-PP. 4.2V (according to the input voltage is different, the output will be different)
6, the maimum output current: 15MA (5V power supply, V-PP is greater than 50%), or 35MA (12V power supply, V-PP is greater than 50%)

Three functional characteristics:
1, the output with LED instructions, there is no direct output of the output (high normal LED amount, low level LED out, the frequency is relatively low when the LED flashing);
2, the output frequency range of grades, so that the output frequency of more continuous adjustment; (due to the error between the components will be slightly deviation problem)
Low frequency file: 1Hz ~ 50Hz
If file: 50Hz ~ 1kHz
Middle and high frequency file: 1KHz ~ 10kHz
High frequency file: 10kHz ~ 200kHz
3, the output duty cycle can be fine tuned, duty cycle and frequency are not adjustable, adjustable duty cycle will change frequency;
4, the output frequency can be adjusted;
Cycle T=0.7 (R1+2R2C)
R1 frequency adjustment potentiometer, R2 duty cycle adjustment potentiometer adjustable for 0-10K;
Low frequency C=0.001UF;
If the file is C=0.1UF;
Middle and high frequency file C=1UF;
High frequency file C=100UF, so the frequency of the waveform can be calculated by the buyer.

Four wiring instructions:

Duty cycle control potentiometer:Reverse timeNeedle increase,ShunNeedle reduction.

Frequency adjusting potentiometer:Reverse timeneedlereduce,Shunneedleincrease.