hi welcome to another video from Robo jack in this video I'm going to introduce this pulse
width modulation generator this is a device that you can be used to control servo and also for any
other purpose if you need pulse width modulation it can just work with 5 volts and it's the model
is XY-PWM so let's get started as for buttons and then we have two for the duty - for the frequency
and then voltage 5 volt input for collect and also here they put four connectors maybe to
connect multiple devices for ground and path width modulation other than that so these are
the components on the other side so you have to be careful and protect them and then this
display has an LED here to backlight to turn it on so I'm gonna crack to pin header here
and also to pin Heather here to start using it so I've soldered here four pins I realize that
we need it and here I've thought there's only two because there is no class so for
the servo we will get up positive from there so now I have 5 volts here the 5 volt you can give
this from Arduino or some power supply I'm getting it from my power supply so that is
the positive and ground is the to last here so once you connect it this is how the screen will
appear I've connected it a servo here as you can see here the orange is the signal connected on
the other side and then the brown is the ground is on this side and then the middle one which is red
connected to 5 volts so I've connected a extra pin here I've connected it but you can connect
it to another 5 volts so now the frequency is hundred Hertz at 26 percent the duty cycle and
point that I've put a tape is on this side this head so let me change the duty cycle as you can
see when I change it I can move the servo to this minimum so if we call that size maximum
or 0 280 degrees so pay attention here that frequency also have effect on this so let me
change it to make it 250 Hertz CC sorry I have to make it hundred and 50 years so reduce it
so higher-frequency will not have any effect lower frequency where the duty
cycle will control the server 30% now at 24% with the frequency also you can
control the server but this is not a proper method this should be controlled only with
the duty cycle it might damage the system so we have to know what you can see this
works before we said this so the common one is 5200 Hertz so let me make it hundred Hertz and
then with the duty cycle you can just move it back and forth so this is a nice device
for testing servo for education purpose for controlling motors and for others applications
so I have connected now this input to the five volts and then these two six the signal
and ground is connected to this or through scope that you see here and at the bottom or
side shows the frequency and also it shows the duty cycle as you can see here it shows
24 percent and we see here so any two point one or two four percent and the frequency
of hundred and fifty kilo Hertz that shows hundred and fifty kilohertz that's strange
so let me change this change the frequency and let's see what we read so hundred and
fifty of the maximum kilohertz and then I'm going down mean hundred kilo Hertz
so, when you see two dots it means 100 kilohertz now the number if it
is I can so now let's go below as soon as I went up kilohertz
so, let's go down and see what we can read, and you can see here 38.3 and
that's Oscar 38.3 become very accurate now okay so when all dots disappear then
this is 1 kilohertz so let me go down 600 Hertz as you can see that's also
good now the signal become better but still some spikes from time to time
so, then he put it at 200 Hertz
so now it's 200 Hertz 201 so let me change the duty cycle again at
this lower frequency, so I chose 100% that is good
26:46 percent so this is 32 that's also showing 32250 that's 1% that's good very nice it's tag
of $5 or $10 it worth it that's very good quality product except it doesn't have any
case or protection so you can use as bear a board like this but it works so thank you
for watching please thumb up the video please share it also if you subscribe I appreciate it
you