Hobby Electronics Basics

A question about relays

I was poking around in my truck the other day and had cause to open up the starter relay. (not the solenoid, the relay...

21 comments posted 8yrs

posted by default

21 comments posted 8yrs posted by default

Anyone here know BLDC motors well? Hobby ones particularly?

I want to use a hobby BLDC motor to power a compact high speed spindle to be used for engraving and the like. Mainly be...

5 comments posted 8yrs

posted by etpm

5 comments posted 8yrs posted by etpm

Using a TO-220 heat sink

Hi, To attach an LM317 (for example) in the TO-220 format to the corresponding heat sink (see link below), is it useful...

41 comments posted 8yrs

posted by a24061

41 comments posted 8yrs posted by a24061

Place Marker

That's right, in between the spam. Everything after this post is post the latest batch of spam, and everything before is...

0 comments posted 8yrs

posted by jurb6006

0 comments posted 8yrs posted by jurb6006

(plastic) optical fibre

Hi, I want to learn a more and experiment with optical fibre, especially for communication. Does somebody here have any...

11 comments posted 8yrs

posted by kristoff

11 comments posted 8yrs posted by kristoff

Torque Vs Speed curve of the Stepper motor

Hi, Does torque vs speed curve tell anything about the acceleration and deceleration characteristics of a stepper motor?...

7 comments posted 8yrs

posted by farahshaw1992

7 comments posted 8yrs posted by farahshaw1992

Psu for valves

I wish to experiment with valves (or tubes, if you prefer) and I shall begin by building a power supply. What voltages...

20 comments posted 8yrs

posted by peterxpercival

20 comments posted 8yrs posted by peterxpercival

mystery tool

In a hardware store, I saw a rectangular bar, 10" long, with two through holes, labeled "MAGNETIZE" and "DEMAGNETIZE". P...

4 comments posted 8yrs

posted by r_delaney2001

4 comments posted 8yrs posted by r_delaney2001

Even Tesla Missed This Low Hanging Fruit Calculation

> https://www.engadget.com/2018/03/22/tesla-says-underpaid-because-batteries-too-fast/ > > It looks like Tesla's batter...

0 comments posted 8yrs

posted by bretcahill

0 comments posted 8yrs posted by bretcahill

Power for DC motor controller

I bought one of these 24v DC motor controllers: https://www.ebay.com/itm/311703088756 It came with zero documentation....

10 comments posted 8yrs

posted by BobEngelhardt

10 comments posted 8yrs posted by BobEngelhardt

Are Brushless Hub Motors External Rotor Relunctance?

Don't want to google this one.

1 comments posted 8yrs

posted by bretcahill

1 comments posted 8yrs posted by bretcahill

wiping contact on aluminum

I need to bleed static out of a moving aluminum structure. I have a springy aluminum tongue (flashing) wiping on an alu...

8 comments posted 8yrs

posted by fritzo2ster

8 comments posted 8yrs posted by fritzo2ster

Math Challenged.

I know I am losing it, but I want to bring it back. I have screwed up some things. Figuring out a roll of wire, I had 9...

14 comments posted 8yrs

posted by jurb6006

14 comments posted 8yrs posted by jurb6006

It worked !!!

My shop is a steel building similar to a quonset hut. The pipes to my bathroom sink run down inside one of the deep cor...

11 comments posted 8yrs

posted by etpm

11 comments posted 8yrs posted by etpm

How do I dial these phones

I hope this is the right place to ask this. My mom gave me head phones for Christmas. They dont look like any other pho...

0 comments posted 8yrs

posted by blondie27d

0 comments posted 8yrs posted by blondie27d