ماژول PWM ژنراتور دو کاناله به همراه سریال و نمایشگرHW-0515 2 Channel PWM Generator Module

ماژول PWM ژنراتور دو کاناله به همراه سریال و نمایشگر

اورجینال

با استفاده از این ماژول کاربردی میتوان دو کاناله خروجی PWM داشت که کانال اول از 0 تا 999 هرتز و کانال دوم از 0 تا 150 کیلو هرتز میتواند خروجی داشته باشد.

• خرید ماژول گیرنده دو کانال

PWM یا همان Pulse-width modulation که به معنای مدولاسیون پهنای پالس می باشد نوعی مدولاسیون کنترل از طریق پهنای پالس خروجی می باشد که میتوان برای کنترل دور موتور،شدن روشنایی ،و مواردی از این دست مورد استفاده قرار گیرد.

ویژگی های ماژول PWM ژنراتور دو کاناله به همراه سریال و نمایشگر:

• ولتاژ ورودی:5 تا 30 ولت
• دارای ارتباط سریال
• دارای ورودی میکرو یو اس بی
• فرکانس خروجی:1 هرتز تا 150 کیلو هرتز
• دمای کاری: منفی 30 تا 70 سلیسیوس
• جریان خروجی: بین 8 تا 30 میلی آمپر
• باد ریت:9600 بیت بر ثانیه
• بیت توقف: 1 بیت
• دیتا بیت:8 بیت

بر روی این ماژول سه دکمه وجود دارد که به وسیله ی راهنمای زیر میتوان فرکانس و پهنای باند را تنظیم کرد.

قطعات کلی بر روی ماژول PWM ژنراتور دو کاناله به همراه سریال و نمایشگر:

ترتیب دکمه های ماژول PWM ژنراتور دو کاناله به همراه سریال و نمایشگر:

HW-0515 2 Channel PWM Generator Module

Product Introduction:

1. Operating Voltage: 5-30V,support micro USB 5.0V power supply
2. Frequency Range: 1Hz~150KHz
3. Frequency Precision: 2%
4. Signal Load Capacity: output current is within 8–30mA
5. Output Range: default 5V V-pp (can be changed by external power)
6. Ambient Temperature: -30 Celsius ~70 Celsius

Application Fields:

1. As square wave generator to generate square wave for experiment development
2. Used to drive steeping motor driver’s square wave
3. Generate adjustable pulse for MCU using
4. Generate adjustable pulse for controlling relative circuit (PWM adjust light speed etc)

Serial Port Control:

1. Communication Standard:9600 bps
2. Data Bit:8
3. Stop Bit:1
4. Verify Bit: none
5. Flow Control: none

Setting PWM Frequency:

1.”S1FXXXT”: set PWM1 frequency as XXX HZ (001~999)
2.”S1FXX.XT”: set PWM1 frequency as XX.X KHZ (00.1~99.9)
3.”S1F:X.X.X.T”: set PWM1 frequency as XXX KHZ (0.0.1.~1.5.0.)
4.”S1″: PWM1
5.”S2″: PWM2
6.”F”: frequency
7.”D”: duty cycle
8.”T”: stop sign bit

Setting PWM Duty Cycle:

1.”S1DXXXT”: set PWM1 duty cycle as XXX;(001~100)
2.”S2DXXXT”: set PWM2 duty cycle as XXX;(001~100)
Setting successfully back: DOWN
Setting unsuccessfully back: FALL

Parameter Setting:

Module has 3-channel key: Set, Up, Down
1.By short press SET key, can shift display 4 parameter values (FR1 :PWM1 frequency; dU1: PWM1 duty cycle; FR2: PWM2 frequency; dU2: PWM2 duty cycle); before shifting, there will be corresponding parameter name flashing.
2. Directly press UP, DOWN key to modify current parameter value
3. 2-chhannel PWM are set 3 kinds frequency value, in frequency display interface, by long press SET to shift, 3 kinds frequency’s duty cycle are the same (XXX:1Hz~999Hz; XX.X:0.1Khz~99.9Khz;X.X.X.:1Khz~150Khz)

Package included:

1 x 2 Channel PWM Generator Module

The command format for setting the PWM frequency is “S1FXXXT”, that means “Set the frequency of PWM1 to XXX Hz (001Hz to 999Hz). And “S1DXXXT ” is applicable for setting the duty cycle (Set the duty cycle of PWM1 to XXX (001~100).

In short:

• S1: PWM1
• S2: PWM2
• F: Frequency
• D: Duty Cycle
• T: End Sign

It just looks like a useful PWM generator module to any electronics hobbyist playing with simple electronics projects who cannot justify spending hundreds of dollars on a function generator, a frequency counter, and/or an oscilloscope.

Obviously, one can build basic PWM generators by means of the ubiquitous 555 timer chip but still that calls for a frequency counter or oscilloscope to set them aright!

On a side note, the onboard 4-pin interface header (see next figure) resembles the familiar SWIM programmer interface for STM microcontrollers. Perhaps, an STM8S003K (or the like) forms the core of the dual channel PWM module. As I said at the start, it might take some time to hammer out.

Another Trial

Since I’d a small 12V/100mA BLDC cooling fan lying in my drawer, I just wired it with PWM1 channel (@25kHz) of the dual PWM module (powered by a power bank) through one IRF530 power mosfet module (not a logic-level mosfet, though) as shown in the following wiring diagram. I tried using the usual ‘fixed frequency and variable duty cycle’ method to govern the fan speed and the setup gave an impressive performance!

And, a few more snaps:

Below you can find 20kHz (50%) PWM signal output (x2) rendered by the dual channel PWM module, and captured by my USB oscilloscope (simply a second pair of eyes)!

A minor PCB surgery!

The final PWM output of the module is at 5V level because the driver transistors are powered by onboard 5V/30mA LDO voltage regulator. Anyway, a simple cut in one circuit track will make it ready for higher-level PWM outputs. Let’s see how!

This can be achieved by skillful cutting of the concerned circuit board track as shown in the above figure. Thereafter, you can apply a higher voltage (12 volt for instance) between V+ and GND solder pads. If it’s an 18VDC input, then you’ll plainly get 18V-level PWM outputs, but make certain that there’s 100% isolation between the V+ pad and the 5V track (clean all debris completely before the next play)!