Brief capacitor charging RC time constant demonstration circuit

Table of Contents

When a capacitor is charging or discharging through a resistor, the voltage changes rapidly at first and then the change slows down over time. We will just look at the charging curve on this page.

Brief circuit schematics with short video – List of pages
Subscribe! https://www.youtube.com/electronzap and check out my latest youtube playlist at Short learning basic electronic circuit tutorials for beginners
Become a Patron! Donations help a lot!
https://www.amazon.com/shop/electronzapdotcom As an Amazon associate, I earn from qualifying purchases.

Diagram

Video below shows how to build this circuit on a breadboard.

Simple RC time constant charging capacitor at switch release circuit by electronzap electronzapdotcom
Simple RC time constant charging capacitor at switch release circuit by electronzap electronzapdotcom



White version of the oscilloscope that I use in many of my recent videos.

  • Time constant is usually indicated by it’s initials (TC) or the greek letter tau ( τ ).
  • RC time constant is determined by the capacitance of the capacitor in farads times the resistance in ohms. τ = RC
  • First time constant changes from the starting voltage to about 63% of the final voltage. Each time constant after that changes about 63% of the remaining voltage. After 5 time constants, the voltage is almost completely changed and therefore the capacitor is usually declared as being fully charged or discharged after 5 time constants.

Video

Quick RC time constant of charging capacitor schematic to breadboard build and oscilloscope

Next topics:

Previous topics:

Make sure to subscribe and ring the bell! from r/ElectronicsStudy


Similar resistor kit to the one I have. Lots of values at a low price.


Home page