Seeking Proposals for Capacitor, Inductor or Resistor Projects

Don't all projects involve capacitors, inductors or resistors?

For instance, my current project is a door entry using my NFC implant. There are lots of all 3 components in the antenna matching circuit. My previous design used a wire-wound inductor as the NFC antenna although I'm intending to change it to a more common (but not-standard sized) PCB antenna. There will be a capacitive touch keypad so my kids can use it without an NFC tag (implanted or otherwise) although obviously this doesn't use discrete capacitors.

The BOM is pretty small. I'm not sure it needs sponsorship because as usual it's time rather than the cost of components that's the constraining factor. If you could sponsor that then I'm sure we'd all be jumping at the chance!

Ah, great question!  Excuse my sloppy writing.

I'm looking for projects where passive components are the central focus of the project. However, I'm flexible.

Randall

Hi Randall,

I'm planning on making a single-reference resistor standard, but I've already purchased the bits and pieces.It uses a single precision resistor -  I thought it would be useful to have around the lab to do a spot-check from time to time with a known value, for circuits under test.

Other cool ideas could be:

Temperature measurement or other measurement devices (using say thermistors)

Filter and oscillator ideas (all could use a combination of inductors and capacitors)

Current measurement projects - I'm writing up a blog post on that today by coincidence, although I didn't focus on the resistor, but I needed a particular 4-terminal one for obtaining a voltage proportional to the current passing through it.

Audio projects - a decent microphone preamp would be handy - requires nice capacitors

Signal generation - jc2048 demonstrated this with many resistors

Long ago when I taught basic electronics I illustrated how a simple series resistor circuit could do something useful.

Many consumer camcorders from the 80's used a simple series resistor circuit with switches to control tape transport (FF, REW, PLAY, STOP, PAUSE, etc.).

The series resistor circuit acted as a voltage divider and the tape transport switches were arranged to feed specific taps along the divider into an analog to digital input on a micro controller.

Alternatively the switches could be arranged to short out various resistors in the divider to change the voltage fed into the controller.

Using supercapacitors to store energy and power project along the lines of the Solar Bubble Blaster project that I did.  The circuit consists of capacitors and diodes.  If you add diodes then there are a lot of additional projects that come into play.  Another idea is DIY resistors, capacitors and inductors.  This could be truly build it yourself or using series and parallel circuits to build new and / or more precise value components.

Time I cannot buy for you! Maybe if we were in Star Trek!

Randall

Wow! Lots of ideas.

If you had the time, I'd like to see the build on the resistor standard.

Randall

Great ideas. I think a supercap project would be something I'd like to see.

I realize it's kind of tough to only include passives.

Like this:

DIY resistors, capacitors and inductors.  This could be truly build it yourself or using series and parallel circuits to build new and / or more precise value components.

Challenge accepted : )

To All,

It looks like some of you have good ideas and are interested in doing a project. element14 will pay for parts. So, I'll need to get more information from you as far as the parts needed. I'll get back to each of you in the next few days to gather more details.

Randall