Electronic Design

Digitally Tunable Capacitor Lets You Build Variable Filters, Z-Matches, And More

How do you implement a variable capacitor these days? Mechanical caps are out. That leaves varactors, which work fine but require higher voltages that often are not available, and their response is ...
Hackaday

The Cutting Truth About Variable Capacitors

If you’ve seen a big air-variable capacitor, you may have noticed that some of the plates may have slots cut into them. Why? [Mr Carlson] has the answer in the video below. The short answer: you can ...
Nature

Practical design of variable fractional-order capacitors with a single tuning feature using field effect transistors and variable capacitance diodes

This paper presents two discrete circuit solutions for realizing passive, electronically adjustable constant-phase elements, specifically half-order capacitors with a –45° phase shift.
Hackaday

Variable Super Capacitor Battery Provides Power On The Go

Instructable user [EngineeringShock] got sick of buying batteries for his devices all the time and has instead opted to build himself a super capacitor bank that can be used to power common household ...