Description

I. scope of application of this module:

1. Used as square wave signal generator to generate square wave signal for experimental development.

2. To generate the square wave signal to drive the stepper motor driver.

3. Generate adjustable pulse for MCU.

4. Generate adjustable pulse and control related circuit.

Ii. Brief description:

1. Size: 3.1cm * 2.2cm

1. Main chip: NE555;

2. Input voltage: 5v-15vdc. When 5V is supplied, the output current can be about 15MA; When 12V is supplied, the output current can be around 35MA;

3. Input current: 100MA

4. Output range: 4.2v v-pp to 11.4v v-pp. (the output range will be different according to the input voltage)

5. Maximum output current: 15MA (when 5V power supply, v-pp > 50%), 35MA (when 12V power supply, v-pp > 50%)

Three advantages:

1. Output with LED indication, whether the output is direct and clear (at low power level, the amount of LED, the high level LED out, the frequency is relatively low LED flicker);

2. The output frequency range grade is optional, making the output frequency more continuously adjustable;

Low frequency: 1Hz ~ 50Hz

Intermediate frequency range: 50Hz ~ 1kHz

Medium and high frequency range: 1KHz ~ 10kHz

High frequency range: 10kHz ~ 200kHz

3. The output duty cycle can be fine-tuned. Duty cycle and frequency are not adjustable respectively.

4. Adjustable output frequency;

Period T = 0.7 (RA rb + 2) C

RA and RB are adjustable from 0 to 10K;

C= 0.001uf at low frequency;

If C= 0.1uf;

Medium and high frequency C=1UF;

At high frequency, C=100UF