How a 555 Works as a Timer. скачать в хорошем качестве

How a 555 Works as a Timer.

In this video I explain the building blocks of a 555 chip and how it interacts with the components you connect around it to become a “Timer”! I talk through each stage of the 555 including Voltage Divider (comprising of three 5K resistors) Two Comparators The Flip-Flop NPN and PNP Transistors utilised for Discharge and Reset We explore the Charge and Discharge times as the capacitor oscillates between the 1/3rd and 2/3rd voltage levels and verify that with an oscilloscope. UPDATE:- I have now posted a new video explaining Capacitor Charge and Discharge timings, which can be found here:-    • Capacitor Charge & Discharge Times   For a follow up Video sharing viewer's Voting Poll on the 555, see my "The 555 Verdict" video here:-    • The 555 Verdict   Another follow up video showing how to gain better control over the duty cycle (percentage of the On time for each cycle) simply by adding a couple of diodes. Click here:-    • Better 555 Duty Cycle Control (PWM).   If you are interested in the handy configurable Resistor boards I utilised you can purchase them from Amazon here:- 🔗https://amzn.to/3RYiX75 For more information about Voltage Dividers, see one of my previous videos here:-    • What Are Voltage Divider Circuits?   ⏱️ Timeline -------------------- 00:00:00 – Introduction 00:00:59 – PKAE Electronics Intro Theme 00:01:09 – Internal Stages starting with Voltage Divider 00:02:29 – Two Comparators 00:04:16 – Control Voltage Pin 00:04:32 – Flip-Flop & Output Driver Stage 00:05:40 – SR Flip-Flop Explained 00:07:27 – NPN Discharge Transistor 00:07:50 – PNP Transistor for External Reset 00:08:14 – Summary of Stages 00:08:39 – Comparator/Flip-Flip Experimenting (Theory) 00:15:54 – Comparator/Flip-Flip Experimenting (Bench Testing) 00:17:58 – Astable Circuitry – External Capacitor and Two Resistors 00:21:20 – Bench Testing Astable Mode 00:22:48 – Datasheet Astable Circuit Diagram 00:23:27 – Control Voltage Capacitor (Stability) 00:23:53 – Timing Calculations (On and Off Times) 00:25:41 – Bench Testing Timings with Oscilloscope 00:29:06 – Timing Summing Up 00:29:17 – Frequency Calculation 00:30:12 – Wrap Up. 🎶Intro Music from #inaudio :- https://inaudio.org/ Track = OddVision-HYPER POP