Hobby Electronics Basics - Main Page

Do you have a question? Post it now! No Registration Necessary

Hobby Electronics Basics - for you, electronics enthusiasts!
Web, RSS and Social Media interface to sci.electronics.basics
There are 99538 individual articles here that are part of 9237 discussions
Please see below the list of the most recent and the best rated articles in Hobby Electronics Basics

The most recent discussions

Inductance calculations

August 20, 2019, 2:07 pm

Somewhere there must be a formula for the inductance of a hand-wound coil. Air core, one layer of wire (of given swg) close-wound, diameter of former (cardboard, probably inside of toilet paper ro... Read more »

Harmon divider 10:1 and 100:1

August 19, 2019, 12:41 am

Just found this neat method to make 10:1 voltage dividers. Not as important now that you can get such precision resistors, but with this you don't need them. Also measurable on a single voltage ... Read more »

Anyone with plc experience?

August 13, 2019, 11:42 am

I was looking for a ready made timer for a hydroponic system I'm tinkering with and came across some el-cheapo PLCs on Amazon, and figured this would work lots better than a timer that would need a... Read more »


August 12, 2019, 3:02 pm

I had a lightning strike hit an antenna mast and it took out a lot of electronics in my house. It actually popped circuit breakers in the house along with taking out the TV, modem, KVR switch, low... Read more »

The Tardigrades

August 10, 2019, 3:31 pm

We can't just leave them there to die. Read more »

Current vs. wire gauge

August 10, 2019, 10:44 am

What current can 18AWG wire carry? And, more usefully, is there a table somewhere giving this info for all the usual gauges? Read more »

12 Vdc led running hot

August 9, 2019, 2:03 am

I bought some 12 VDC 5 mm red leds. They work find but... when I touch the wires going into the led, they were hot enough that I had to remove my hand. That does not seem normal. Thanks. Read more »

Rebuild computer speakers

August 6, 2019, 5:59 pm

I bought some Inland Pro Sound 2000 speakers from a thrift store. It is an amplified system putting out about 7 watts. They sound pretty poor. I remember making my own 8 ohm speakers years ago usi... Read more »

Two diode vs four diode rectification

  [ 2 ]
July 30, 2019, 2:04 pm

What is the advantage of a four diode bridge full-wave rectifier over a two diode full-wave rectifier. There must be some, else why accept the extra cost? -- He who will not reason is a bigot... Read more »

Isolation transformer?

July 28, 2019, 11:56 pm

I was looking for a 120-120 isolation transformer on eBay and I kept finding 120-240/480 transformers. There are 2 secondaries on these (connect in parallel or series). It occurred to me that I... Read more »

Click here for other recent discussions »

The best rated discussions


Where to buy a small wheel hub motor?

Specifically, where can I buy a high quality small wheel hub motor (with wheel) like the one used for powered Trikkes? http://www.trikke.com/hd_2/Refurbished-Trikkes/Tribred-E-Kit-Upgrade http://www... Read more »


Satellite radio - radio validation

I'm curious, can someone provide a simple several paragraph, basic explanation of how satellite radio authentication works? eg. If the radio is only a receiver and I cancel my subscription how does ... Read more »


Max Frequency of SM 118A counter?

  [ 2 3 ]

Anyone know the maximum frequency of a Heathkit SM-118A? I have been all over Google with little luck. One guy said it would go to 1 GHz maybe 2 GHz, I don't think so. ... Read more »


Software for PIC 16F876

Hello, I want to built a simple datalogger with a PIC 16F876, and found a nice schema on the net. My problem: te software (source) is written in C, but i need a hex files to program the PIC processor... Read more »


Soldering Copper to Phosphor Bronze

Does anyone know if soldering copper wire to Phosphor-Bronze make a solid and reliable electrical connection? Would it make much of a difference if the copper wire is stranded or solid? If there is a... Read more »


Best Light for reading?

When choosing a Flourescent Bulb for a Task Light what is the best for reading.......my choices are 2700 Kelvin, 3000, 3500, or 4100..... Read more »


Thought experiment-will this work?

I think I pretty much understand how induction motors work. A typical single phase motor has a start winding that is approximately in quadrature electrically to the run winding. This provides the p... Read more »


How do you test a capacitor?

  [ 2 ]

Just bought a generator and it failed within two hours of usage. Mfg. say maybe capacitor and will ship a new one. But am not sure. I have a voltmeter with capacitor readings. Know how to test for re... Read more »


Electronic parts sites

I am looking for sites that sell electronic components. I have Jameco, but they don't have a lot of components. Thanks, Andy Read more »


UCANDO videos

If anyone has any old ucando videos on the subject of AC or DC or power supplies or amplifiers or any basic stuff and you want to sell them, at a resonable used price, I'd be interested. I'm just ... Read more »