Ebay 3 channel PWM Module
Ғылым және технология
Taking a look at a very inexpensive (4$ CAD) PWM module. This board has three separate channels and a very nice LCD.
PWM stands for pulse width modulation, which is basically controlling voltage going to a device by chopping up a set voltage. the higher the on-time (PWM%) the more average voltage will be sent to the device.
This module is useful for speed controlling motors, dimming LEDs and a host of other things!
Thanks for watching!
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Пікірлер: 47
I need this. Great video!
No your videos are very good and do not need music all the good channels do not use music and you are in the with them,there is enough music on here ... keep up the good work
You don't need of more than 20kHz for motor PWM (just a bit higher than hearing sound). "Plate" on mosfet's gate waveform is a "Miller charge", generator has very weak output power for fast driving this mosfet (which is too powerful for this small motor). Also it's recommended to connect a diode to motor's pins for recuperate back EMF high voltage spikes.
Really cool to see how the wave behaved under high frequency low dutie cycle
@SimpleElectronics
4 жыл бұрын
Yeah I don't know why I waited so long to get a scope! - perhaps it was the cost lol
@GeorgeJFW
4 жыл бұрын
@@SimpleElectronics I hear ya I really likey PC scope but I feel I need more soon lol
hi, thank you for this great video. want to ask, how many watt is the output for this module?
@SimpleElectronics
7 күн бұрын
Very low, in the order of milliamps, it's meant to be used where you would use a microcontroller
Will the set frequency and duty cycle for both channels individually remain the same even after the power supply is removed? or it gets reset once the power supply is removed.
Great video. Is there a way to make this module output a negative pulse? (without reversing the leads?) I need to make a set of HI/LO (+/-) with a common ground.
@SimpleElectronics
Жыл бұрын
Not with this module but you can use it to trigger a negative pulse module for sure
I see that some motor experiments need a “fly-back capacitor across the power-ground connections on the motor. Could this be the source of your funky waveform?
Do you know how could I invert the signal and have the complement of pwm1 in pwm2? As the osciloscope was doing?
@neilbarnett3046
Жыл бұрын
Look up circuits for a single transistor inverter, or use an operational amplifier.
Hey finally an upload! Great job as usual, also have you considered having some soft background music? In my opinion it would work wonderfully for your video style
@SimpleElectronics
4 жыл бұрын
I have considered it but there's a lot of BS on YT right now about companies copyright striking royalty free music, and I really don't want to go through that headache at the moment. I will keep the suggestion in mind though since I'll sometimes try new things on a whim
@Razvii
4 жыл бұрын
@@SimpleElectronics yeah it's sad really but thanks for considering my suggestion!
@SimpleElectronics
4 жыл бұрын
@@Razvii of course! I love community feedback!
@Seadogstudio
4 жыл бұрын
I appreciate having no music. I can concentrate on the speech.
Would you be able to make a short video of using this device as a cooling fan controller? Thank you.
@SimpleElectronics
2 жыл бұрын
I think it would be a bit awkward as a fan controller - I think this would be a better option: kzread.info/dash/bejne/qn9srKh8aaeogrQ.html (full series)
@Mad_Scientist2052
2 жыл бұрын
@@SimpleElectronics on second thought, your right. Thank you.
is there a place to get premade cases for these modules?
Silly question but how am I supposed to see in realtime the duty varying on dso, I tried setting mine, but it's not showing in real time duty variation
@juangizirian9810
6 ай бұрын
Ok I think my model doesn't update real time, it's just after button release
Try this test with 12v lamp( old car lamp )
Hi, how to use this device in metal detector? thank you
@SimpleElectronics
2 жыл бұрын
I have no idea!
Please help with settings. I want to run both the channel on 50% duty cycle @ 1Khz. While I want to run channel 1 instantaneous, I want channel 2 to commence only after Channel 1 reaches zero duty. eg: When Ch.1 = 5v, Ch.2 = 0v and vice versa. Thanks
I liked your experience. How about UART management?
@SimpleElectronics
4 жыл бұрын
I am definitely no expert in comms, but I'm willing to learn!
@SoundOfYourDestiny
4 жыл бұрын
I have the single-channel one and serial control at 9600 works fine.
@alexvisard
4 жыл бұрын
@@SoundOfYourDestiny Did I understand you correctly that you transmit control commands and read parameters?
@SoundOfYourDestiny
4 жыл бұрын
@@alexvisard Yep. The syntax is simple. You can find it in the product description here: www.ebay.com/itm/3-3V-30V-Adjustable-Module-PWM-Pulse-Frequency-Signal-Generator-Test-Equipment/132575860363
Mine has the same visibility problem, even to the naked eye. Kinda lame.
I don't think your driving the gate of the mosfet with enough current to get clean switching.
@jimmybrad156
Жыл бұрын
mosfets are voltage driven, not really current driven.
You missing the diod ( it necessary for the motor ) that why you see this signal
@SimpleElectronics
4 жыл бұрын
hmmmm you may be right, I'll have to try that
@abeditani8293
4 жыл бұрын
Schotty diod ( for the low reverse signal )
@felixcat4346
3 жыл бұрын
It's got a built-in diode according to the video, so WTF?
I could see by your plastic component container that you are Canadian. Dollarama.
@SimpleElectronics
Жыл бұрын
Yes sir, Ottawa, Ontario, Canada
@E-BikingAdventures
Жыл бұрын
@@SimpleElectronics . Hey me too! Vanier. I probably know sombody that knows somebody that knows you.
1.0.1 mean 101Mhz
@JB-20
3 жыл бұрын
1.0.1 means 101khz. This is limited to 150khz remember.