Pulse Generator, DROK 2pcs LCD Display PWM Frequency 1Hz-150kHz Duty Ratio 0-100 Percent Adjustable Square Wave Rectangular Wave Signal Generator Board

This is an excellent function generator! It's extremely simple to use and understand. br>I opened the static bag, soldered standard jumper posts to V and V-, and then closed it again. (Connect these to your power supply. ) 330V), as well as to PWM and GND. The output is the PWM contact, and GND can be directly connected to true ground - In my case, it's an oscilloscope probe and a ground lead. When I switched on my 12V power supply, I was greeted by a lovely 0 to 12V square wave at 100 Hz. I added a cap in series to center the square wave around the ground, keeping the voltage at 12V. There are two button pairs to choose from: + and - for the words "frequency" and "duty," respectively. I didn't experiment with duty cycle, but frequency is settable in the same way that an alarm clock is settable, with slow increments speeding up as you hold the freq button down (so getting to higher frequencies doesn't take an eternity). br>I got my desired GND-free frequency. 12V p- centered minutes after the package was opened, p, 31kHz square wave br>The display is bright and clear, and there appears to be TTL external control (which I did not investigate). The PCB quality is excellent. With the exception of soldering flux on the backside where the LCD was soldered in, everything is in top shape. It was spotless with just a little acetone. br>It's a fantastic little unit. You can't go wrong with a couple of these for $9 each.

Isabelle Ashley

| Aug 28, 2021

This signal generator is exactly what I've been looking for. I have two dogs on either side of me who bark bark bark barkbarkbarkbarkbarkbark barkbarkbarkbarkbarkbarkbarkbarkbarkbarkbarkbarkbarkbarkbar I'm looking for something that can produce a tone at 23 kHz and drive some extremely powerful ultrasonic tweeters. I found these after searching the internet for a long time. It's incredibly simple to set up and operate. Proofing on a computer They turn on right away and drive the tweeters at a low power level in the concept test. So now I'm going to run the signal through an 800 watt amp and point it at the dogs next door who are barking for no reason. I spent more time getting the speakers out of the blister pack than I did setting up the rest of the project.

Catalina Gilmore

| Jun 21, 2021

These things irritate me to no end. I bought several because the price is so good. Simply connect a mosfet to your voltage and amperage requirements, and it will power almost any lower frequency project; however, keep in mind that the square wave isn't very square in its higher frequency range. It's ideal for controlling the drive frequency of transformer coils or pulse width modulating DC motors, among other things. I've been using them to test car fuel injectors and coils, as well as high-voltage coil drivers like flyback transformers.

Rayan GREENWOOD

| Dec 07, 2021

This is a great little board that gives you the signals you want. However, there are some limitations that aren't stated, such as the pulse width being limited to 10 milliseconds at the lowest setting. A 1Hz signal at 20 micro-seconds was actually required. seconds. So it didn't work for me, but it's still a good and useful tool in general. We ordered 14 of these, which was a mistake.

Harleigh Fuller

| Dec 11, 2021

It does exactly what it says on the tin, and it has a programmable PCM output. The only issue was that the viewing angle on the LCD display was slightly off and could not be adjusted, but this was not a problem for me. To see the display properly, I simply had to look at it from a different angle.

Saint Stewart

| Jul 05, 2021

I believe it would be extremely helpful to customers if the shipment included tech info on input and output voltages and how to best use the device, because I don not understand the duty It was necessary for me to travel to Droking. For more information on the component, go to www. com. It appears to be capable of interacting with other systems. It would be nice if I didn't have to go look up that function right now.

Melany Chase

| Apr 14, 2021

br>br>I was very impressed with this product. br>br> I looked all over the internet for a simple 555 timer assembly before finding this. I initially ordered one and had no trouble putting the system in place. The only difficult part was sizing the power supply resistor for the correct voltage drop (which was simple!). I placed a second order for twenty more and installed them all without a hitch. br>br>Attention: br>br>Disclaimer: I looked into the ramifications of disabling this fan assembly ahead of time to see if the product could handle the reduced cooling, and everything turned out fine.

Abigail Rivers

| Sep 17, 2021

It's perfect for driving stepper controllers.

Viviana Mayer

| Oct 10, 2021