Brief discharging capacitor voltage ramp using LM334 current source

Discharging a capacitor at a steady current means that it’s voltage will drop steadily. A steady voltage change is called a ramp.

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Diagram

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

Simple discharging capacitor voltage ramp circuit schematic by electronzap electronzapdotcom
Simple discharging capacitor voltage ramp circuit schematic by electronzap electronzapdotcom


Video

Quick discharging capacitor voltage ramp circuit schematic to breadboard build

Updated diagram and video:

Discharging capacitor voltage ramp using LM334 three terminal adjustable current source schematic diagram by electronzap
Discharging capacitor voltage ramp using LM334 three terminal adjustable current source schematic diagram by electronzap
  • One farad (1F) super capacitors will change their voltage by 1 volt each second that one amp of current flows. Those are very large values for most capacitors, and therefore it is usually 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.

Discharging capacitor voltage ramp circuit using LM334 three terminal adjustable current source

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  • 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.