Hobby Electronics Basics

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Loop antennas

Assuming that a single turn loop will receive a particular frequency better than others will a multiple turn loop of the...
5 comments posted 20yrs
posted by dewhurst
5 comments posted 20yrs posted by dewhurst

Tagging Cables?

Any ideas on how to tag video cables and the like, so that I can at least identify what equipment they belong to--camco...
4 comments posted 20yrs
posted by wolf_tracks
4 comments posted 20yrs posted by wolf_tracks

cascode switching

I tried firing a car ignition coil by connecting a 400 volt transistor in cascode, like this: +12 v | | +--+-------+ |...
22 comments posted 20yrs
posted by kellrobinson
22 comments posted 20yrs posted by kellrobinson

Help req please - Identifying SMD transistors

Hi, i have an unidentified circuit board which i'd like to replace completely by making my own. It has a couple of SMD...
1 comments posted 20yrs
posted by jackflash
1 comments posted 20yrs posted by jackflash

Electronic Remote Key for 2003 Forester

My electronic key for the car has gotten a little odd lately. It seems to work about 1 out of 50 tries. I can stand clo...
0 comments posted 20yrs
posted by wolf_tracks
0 comments posted 20yrs posted by wolf_tracks

What is power latch?

Dear All, Product A "shall enable the power latch upon startup"? What is that mean? Best regards, Boki.
5 comments posted 20yrs
posted by bokiteam
5 comments posted 20yrs posted by bokiteam

555 timer to make 120HZ motor drive?

This probably won't work. I don't know enough about motors and electronics to know. I was looking at some zero crossing...
2 comments posted 20yrs
posted by etpm
2 comments posted 20yrs posted by etpm

remove DC voltage

Hello, I came across the following problem which I would like to solve with your help. My brand new iRiver iFP899 provi...
4 comments posted 20yrs
posted by quinn_the_esquimo
4 comments posted 20yrs posted by quinn_the_esquimo

How do I charge a Sub-C Battery ?

Hello, Sorry if this sounds like a simple stupid question. How do I charge a Sub-C Battery? Do I need a special battery...
17 comments posted 20yrs
posted by yoshi
17 comments posted 20yrs posted by yoshi

n-type sample of silicon

One question, "An n-type sample of silicon has a uniform density Nd= 10(power 16) atomes cm(-3) of arsenic. Find out th...
3 comments posted 20yrs
posted by patrick.zou
3 comments posted 20yrs posted by patrick.zou

Proper cleaning of an IC

Hello Group, I am interested if there is an industry standard on the simple cleaning of a dirty IC of general grime (di...
6 comments posted 20yrs
posted by waynelittle
6 comments posted 20yrs posted by waynelittle

Analysis of circuits containing diodes

Hi, For the past couple of weeks I've been working through a book called "Network Analysis" by M.E. Van Valkenburg. Spe...
6 comments posted 20yrs
posted by longjohnstuartmill
6 comments posted 20yrs posted by longjohnstuartmill

water-powered clocks and calculators

Re those clocks and calculators powered by a water battery, e.g.: http://www.thinkgeek.com/gadgets/electronic/757e/ Can...
4 comments posted 20yrs
posted by tombrown
4 comments posted 20yrs posted by tombrown

Help with wiring a 12V 4PDT Relay

I am trying to follow the following schematic: http://www.scied.science.doe.gov/nmsb/pdfs/Buzzerset.pdf Radioshack no l...
3 comments posted 20yrs
posted by samluber
3 comments posted 20yrs posted by samluber

audio question

Can someone give me direction on this? I want to build a circuit that allows me to remix(?) left and right channels fro...
9 comments posted 20yrs
posted by darths68ss
9 comments posted 20yrs posted by darths68ss