Hobby Electronics Basics

60's-vintage motor overload heaters

http://imgur.com/yIx0dC6 Original on the left, purchased replacement on the right. Questioning whether these are equiva...

4 comments posted 10yrs

posted by not

4 comments posted 10yrs posted by not

Permeability in a DC Motor

Two motors were evaluated to find the ratio of the speed of the rotor over the speed of the electron in the coil. ratio...

15 comments posted 10yrs

posted by omnilobe

15 comments posted 10yrs posted by omnilobe

CMOS joke

Free MOSFET samples = complimentary metal oxide semiconductors :p

13 comments posted 10yrs

posted by mrdarrett

13 comments posted 10yrs posted by mrdarrett

11 cents per kilowatt hour

Job opportunity: A team of bicyclists will be employed to generate one kilo watt of electricity, all day and all night....

12 comments posted 10yrs

posted by omnilobe

12 comments posted 10yrs posted by omnilobe

Picking an inductor

Hi all, silly question. (And I'll most likely just pick something before I get an answer.) So just a simple LP filter f...

2 comments posted 10yrs

posted by gherold

2 comments posted 10yrs posted by gherold

OT? GM is spot-welding steel to aluminum!

Detroit newspapers have recently featured a story about GM's new technique for spot-welding steel directly to aluminum,...

5 comments posted 10yrs

posted by N0Spam

5 comments posted 10yrs posted by N0Spam

Project Enclosures

I am in need of "project boxes" and was hoping to get ideas from others. Specifically what I need are recommendations o...

16 comments posted 10yrs

posted by Searcher7

16 comments posted 10yrs posted by Searcher7

classroom Van der graaff generator

https://pl.wikipedia.org/wiki/Plik:Van_de_graaf_generator.svg There are the positive charge on the sphere. But in the a...

18 comments posted 10yrs

posted by sz.bialek

18 comments posted 10yrs posted by sz.bialek

MP3 disc burn with playlist

Our Bose Wave radio can play MP3 discs but it requires 'PLAYLIST.M3U' and 'PLAY.EXE'. I would like an MP3 burner like t...

0 comments posted 10yrs

posted by stratus46

0 comments posted 10yrs posted by stratus46

OT: Drywall Saw Using Jig Saw Blade

Ran across an interesting idea where a guy used a jig saw blade as a drywall saw... making his own handle. Really nice...

6 comments posted 10yrs

posted by To-Email-Use-The-Envelope-Icon

6 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon

why are stepper motors so hard to turn?

I took apart an old inkjet printer and was surprised the stepper motor has such resistance to it, if it's just an iron g...

16 comments posted 10yrs

posted by mrdarrett

16 comments posted 10yrs posted by mrdarrett

I'm available for projects

I sit here bored out of my skull with nothing to do but play Solitaire until the next project start on July 5 ;-) I'm n...

39 comments posted 10yrs

posted by To-Email-Use-The-Envelope-Icon

39 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon

fan motors

What kind of ac motors are in oscillating fans and 20-inch box fans (the ones with capacitors)? Thanks, Michael

18 comments posted 10yrs

posted by mrdarrett

18 comments posted 10yrs posted by mrdarrett

switched reluctance motors

Hi, Anyone know where I can find small (100 W or so) switched reluctance motors for sale? (Yes, I used Google, and the...

11 comments posted 10yrs

posted by mrdarrett

11 comments posted 10yrs posted by mrdarrett

charge pump for Jim

https://dl.dropboxusercontent.com/u/53724080/Circuits/Power/5-to-12-pump.JPG If you have trouble understanding this, jus...

9 comments posted 10yrs

posted by jjlarkin

9 comments posted 10yrs posted by jjlarkin