ZK-PP1K PWM Pulse Signal Generator, Frequency Generator PWM Pulse Number and Frequency Duty Cycle Adjustable LED Display with Shell Module, Square Wave Rectangular Wave Signal Generator

works perfectly – has full enclosure – good signal quality - to get instructions copy websiteIn reference to module: ZK-PP1K . The website photographs do not show that this module is actually totally enclosed within a box. If you are really good at cutting exact measurement perfect rectangular holes, then you can panel mount this using the side snap in clips.The product came in a tiny package with no instructions. To easily get the instructions I simply saved the web page as an *.pdf and then did some editing. This module works perfectly with good design and build quality. I will buy more of the other different offered modules.

Voltage DOESN'T drop more than slightly at low pulse width like with cheaper units.

Man they shipped this fast. Works amazing.

I got this to control a small DC motor. Easy to wire up, a hot and negative coming in from supply voltage and the same coming out to the motor. It controls the speed nicely, and it's Illuminated. So far it's holding up, but I am not sure how many amps it can handle.

What a handy little gadget to have on the workbench! Surprisingly accurate, easy to use, and delightfully inexpensive at about $15 - I have all sorts of uses for it, but they all have one thing in common: too sketchy to risk my AWG on. This little guy is inexpensive enough I can risk it, and accurate enough I won't miss the AWG, and on top of all that, it comes in a handy enclosure, that will easily snap into a hole cut for it, so it's easy to integrate into a project. It's max output is a small number of mA, but the manufacturer also makes a ZK-PP2K model that can support 8A output - I liked this one so much, I was inspired to order a couple of those, as well.One area that many of these inexpensive electronic components fall down in is instructions/data sheets - my hat is off to this manufacturer - on the back of the device itself, I found a QR code labeled "Instructions", that contained …you guessed it, a detailed manual. Note that the manual is long - and it is Chinese first, then English - so, when you open it, and scroll past like 20 pages of Chinese, you may be forgiven for coming to the conclusion that it is ALL in Chinese, but be patient, and scroll on - there are English instructions there, too!