PWM Frequency Generator, 1-Channel 1Hz-150KHz Adjustable Pulse Duty Cycle Function Generator, Square Wave Signal Generator Module with LCD Display and Rotary Switch

This is a decent product for control of brushless motors and water pumps. My case is a Pierberg CWA-400 and this works flawlessly. There is another similar controller on Amazon but watch out as it does not have selectable frequency as this model does have full range of duty cycle and frequency. Pierburg pumps like 50-150hz and 95% duty cycle is 100% motor speed. If you set for 100%, the logic in the pump will allow for 90% pump speed. Just FYI, this is stated in the water pump manual/data sheet and test in my lab and in my car. 5 stars as it does what it claims and the internal clock is really close as verified by my rubidium standard.

This signal generator is a small, easy-to-use stand-alone panel-meter-size device intended for a circuit design and prototyping bench or testing environment. Its overall build quality and high performance-to-cost ratio make it ideal for students, electronic hobbyists, makers and DIY enthusiasts. It can be used as-is or it can be easily mounted in a larger panel. It only draws a few tens of milliamps so it can be powered by almost any available DC supply from 3.3V to 30V. There is no provision for controlling output amplitude but an external potentiometer can be easily added to do this. The output source resistance is about 1 kilohm and the output waveform swings to within a few millivolts of the power supply rails. This makes it very easy to drive associated logic. Settings are remarkably stable with changes in power supply voltage over the full range, from 3.3V to 30V. A front panel button conveniently enables and disables the generator output during prototyping and testing. The LCD is bright and easy to read. It provides accurate display of operating frequency and duty cycle. A single front panel knob provides for fast setup of both frequency and duty cycle. There appears to be a serial interface that can also be used to set these values, but the rudimentary documentation and lack of headers on the printed circuit board prevent me from testing this functionality. There are two different operating modes, Normal and Precise. The Precise mode offers better duty cycle granularity over a narrower range of frequencies. A very important feature of this unit is its ability to preserve frequency and duty cycle settings after power cycling. Whatever the settings are prior to power being removed will be restored when power is re-applied. In addition, the settings are lockable, making it easier to keep your associated circuitry safe from unintentional changes. One feature I find particularly useful is the ability to set upper and lower limits for duty cycle. My video demonstrates use of this generator’s programmable lower and upper duty cycle limits to control a small RC Servo through 180 degrees of rotation. A single 18650 Li-Ion cell could power this setup for days without recharging.

The control panel on my treadmill stopped working. I bought this board and set it for 20HZ . My treadmill is working again.

Work great for me. I use it to control when the M2100 treadmill motor board has no problems.

First one had broken tabs. 2nd way fine and works as it should.

Worked as it should

I bought this to use with a motor and power supply from a PaceMaster Pro Plus treadmill. I can’t say it was easy to figure out, but I know very little about circuitry. Eventually I got it working. Good deal.

spent way too much time trying to decipher non-english notes about it's frequency and duty cycle settings. Some characters appearing on LCD screen are not in any notes or descriptions. no way to contact seller for information. Who do I send my bill to for my time?

Easy to use. Works great with a combustion blower.