Capacitor voltage changes steadily when provided a steady current. This creates a straight line if you look at the voltage change on an oscilloscope. A steady voltage change is called a ramp.
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.
Video below shows how I put this circuit together on a breadboard.
- One farad (1F) capacitors will change their voltage by 1 volt each second that one amp of current flows. Those are very large values, so usually it is a fractional amount. For example, a 0.001F (1,000µF) capacitor with 0.001A (1mA) of current flowing, will also change voltage at a rate of 1V per second.
White version of the oscilloscope that I use in many of my recent videos.
Updated video and diagram:
- Brief discharging capacitor voltage ramp using LM334 current source
- Brief fixed resistor voltage divider circuit
- Brief trimmer potentiometer trimpot variable resistor voltage divider circuit fragment
- Brief 555 bistable mode flip flop alternating LEDs circuit
- Brief 555 timer monostable one shot mode circuit
- Brief switch controlled indicator LED circuit
- Brief polarity indicator LEDs circuit
- Brief capacitor charge and discharge through LEDs circuit
- Brief capacitor charging RC time constant demonstration circuit
- Brief capacitor discharge RC time constant circuit
- Information on this site is not guaranteed to be accurate. Always consult the manufacturer info/datasheet of parts you use. Research the proper safety precautions for everything you do.