2-Channel 5V PWM Pulse / Square Wave Generator Module 1Hz-150KHz Frequency
2-Channel 5V PWM Pulse / Square Wave Generator Module 1Hz-150KHz Frequency
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This economical 2-channel PWM pulse / square wave generator provides two pulse / square wave outputs with independent control over each channel's duty cycle and frequency using the straightforward LED display and set/up/down buttons. It can also be programmed through its serial RS-232 interface.
Applications include:
- A square wave generator to generate square wave signals for experimentation and control
- Driving stepper motors
- Generating adjustable pulses for microcontroller use
- Generating adjustable pulses for PWM control of lighting and LEDs
Features and Specifications:
- Operating Voltage: 5-30V, supports MicroUSB 5V input power
- Frequency Range: 1Hz - 150KHz
- Frequency Precision: 2%
- Output Signal Capacity: Up to 30mA output current
- Output Voltage: Default 5V P-P, can be varied with an external power supply input
- Ambient Operating Temperature: -30℃ to 70℃
Operating Parameter Settings:
The module has 3 control buttons: Set, Up, and Down
Short pressing the SET key will step the display through the 4 operating parameter values:
When each parameter is selected by pressing the SET button, the parameter name will flash before displaying the value.
After the parameter is selected, press the UP and DOWN buttons to modify the parameter's value.
The duty cycle can be set from 1% to 100% in 1% increments.
The frequency range can be selected before entering the value by long-pressing the SET button (approximately 1 second or longer):
Serial Port RS-232 Control:
Setting PWM Frequency via the Serial Port:
Setting PWM Duty Cycle via the Serial Port:
Package Includes:
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Quality construction and works well. Fast delivery all good
The product worked but the advertised frequency is not what the product puts out. I see 100 Hz to 100kHz on my oscilloscope. Unless this product was not programmed correctly before shipping it does not work for the frequency I need which is between 47Hz to 63Hz. Can the seller update frequency output parameters so others don't buy if needing under 100Hz with a 50% duty cycle? Or can the seller provide instructions to get the frequency to adjust down to 1Hz?
Thank you for your review and feedback on our 2-Channel 5V PWM Pulse / Square Wave Generator Module. We understand your need for a lower frequency range and we would like to offer some instructions that may help you adjust the frequency to 1Hz. While you are in the frequency settings PA1 or PA2, the frequency range can be selected before entering the value by short-pressing (tapping) the SET button:
- XXX Display (Default): Frequency values from 1Hz – 999Hz frequency range
- X.XX Display (1 short press of the SET button): 10hz – 9.99Khz frequency range (i.e. 1.20 = 1.2KHz, 5.55 = 5.55KHz)
- XX.X Display (2 short presses of the SET button): 100hz – 99.9Khz frequency range (i.e. 01.2 = 1.2KHz, 55.5 = 55.5KHz)
- XXX. Display (3 short presses of the SET button): 1Khz~150Khz frequency range (i.e. 003. = 3KHz, 100. = 100KHz).
The location of the decimal point in the display indicates the range that it is set to - see the examples above.
It can also be programmed using the Serial Port RS-232 Control. Please see our support website for more detailed instructions. The URL is https://support.envistiamall.com/kb/2-channel-5v-pwm-pulse-square-wave-generator-module/
- Well Manufactured 2 Channel square wave signal generator – NO DATASHEETThe website description is accurate and this module works well for my project. Because the product is a good price and does what it says, it deserves a full 5 star rating. I was temp
Please see our online datasheet and operating instructions on our support website at https://support.envistiamall.com/kb/2-channel-5v-pwm-pulse-square-wave-generator-module/
The product works exactly as advertised. It will help jump start my "project" before I roll my own.Update: The seller does have a website with helpful information that I was unaware of when I wrote this review. No where to go up from 5 stars so my rating stays the same.I wish it had some basic documentation....specifically if I wanted to solder it down to a board for use, it would be nice to know what I am exactly connecting to ....input/output schematics without giving away the innards, if they are worried about that.Here is the pros....So its pretty accurate. Performs its stated task well. I didn't see a crystal, so I am not sure how that is.The crystal may be under the LED display....as well as the crtical "innards" making it function.Frequency and duty cycle are independently adjustable.User interface is somewhat intuitive, but you will have to figure it out by playing with the push buttons. Update: Look for sellers link to his/her website on this page.Here are the negatives.1) Zero instructions…. Update… I found them.2) No schematics....at least some interface info would help...don't want to blow it up. Still true.3) USB connector for power...ok fine. What if I hook in my own? Update: Seller has some info.4) You will need to solder to it to get signals out.....so you will need soldering skills. No biggie for me, but letting you know.5) update: you can program it through a serial interface. I haven’t tried it yet, but this is a bonus I was unaware of.Here are the unknowns.1) I didn't quantify jitter if that is important to you...you are on your own. Its not for me.2) I didn't quantify drive strength of the outputs. That is important to me, but I can always buffer the outputs. Update. I guess they can do 30mA.
Great readout and two outputsI use this for bench testing auto ECMsOne output is RPM and the other is vehicle speed