In this video we’ll be generating a PWM signal using a 555 timer. I have a 555 timer here generating a square wave signal that I can control using a potentiometer to replicate a pulse width modulated signal. You can see as I change the value of this pot, the signal is changing from mostly off to mostly on and vice versa, and the led is getting brighter and dimmer. If you have no experience with the 555 timer, watch my last video, I went into a fair bit of detail of how it all works. This video will build off the back of that one.
Link to 555 Timers:
https://amzn.to/3qFTWyZPrevious Video:
https://youtu.be/RnMBxAfGnQoTimestamps
0:00 Intro
1:00 What is PWM?
4:19 Basic 555 Timer Schematic
5:05 Output Voltage & Capacitor Voltage
8:30 Replacing R2
10:25 Potentiometer Explanation
16:15 Charging Paths
17:30 Schematic
21:05 Demonstration
23:45 Buzzer
_____________
Hi, I'm Hamed, an Electrical & Electronics Engineering Student in Leeds, UK. At the time of recording this video I am approaching my third and final year at university.
Visit my website at www.hamed.engineer
If you have any questions you can email me at hamed@hamed.engineer or just comment below.
Stuff You May Have Seen In My Videos
The Oscilloscope I Use (From Banggood):
https://www.banggood.com/custlink/vvDYZsbEdFAlternative Oscilloscope £220:
https://amzn.to/32JhxXxElegoo Arduino Most Complete Kit £50:
https://amzn.to/3EKfdMZElegoo Arduino Basic Kit £15:
https://amzn.to/3mSEpL4Soldering Iron Station £28:
https://amzn.to/3eONT5yHandheld Oscilloscope £50:
https://amzn.to/3HvJRvyHandheld Oscilloscope £100:
https://amzn.to/3ENljMGDIY Function Generator £9.99:
https://amzn.to/3JCQrCgLavolta Power Supply £60:
https://amzn.to/3mMvwmbEventek Power Supply £60:
https://amzn.to/3HxP9q3Elegoo Breadboard Accessories £15:
https://amzn.to/3JD55JyYou Can Also Find The Above For Cheaper On Banggood/Aliexpress