Hobby Electronics Basics

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Need a remote switch idea

--I've got a loooooooong driveway. I want to put some EL wire on a sign at the end so people know where to turn. The EL...
7 comments posted 20yrs
posted by steamer
7 comments posted 20yrs posted by steamer

Getting En from NV

Hi, I'm looking at a supposedly low noise N-JFET (NTE458), which only supplies the Noise Voltage data, as 15mV (Id=0.5m...
8 comments posted 20yrs
posted by pmlonline
8 comments posted 20yrs posted by pmlonline

magnetic switches

Greetings... Several years ago, perhaps the 70's, I got some magnetic switches.. at least that is what the draw I put t...
3 comments posted 20yrs
posted by larya
3 comments posted 20yrs posted by larya

Is this buck/boost xmfr wiring correct?

If I want to raise the voltage to an ac 120 volt motor by, say, 12 volts, is this a way to do it?: Use a 120 volt prima...
6 comments posted 20yrs
posted by etpm
6 comments posted 20yrs posted by etpm

Capacitors

As a kid; I use to tear electronics apart and break capacitors off of the circuit boards and chew on them, especially t...
4 comments posted 20yrs
posted by miseryneverend
4 comments posted 20yrs posted by miseryneverend

JFET amp noise

Hi, Is the following equation correct for calculating a simple j-fet amp noise? The positive battery terminal is going...
22 comments posted 20yrs
posted by pmlonline
22 comments posted 20yrs posted by pmlonline

delay

Is there any easy way to delay an analog signal through a cable by half a second? (without digital conversion)
30 comments posted 20yrs
posted by mike7411
30 comments posted 20yrs posted by mike7411

flip flop metastability

Hello, I've been doing some reading on metastability of flip flops when you have inputs that are asynchronous or coming...
6 comments posted 20yrs
posted by ninjak
6 comments posted 20yrs posted by ninjak

Freezing and Fading a led

If I have a LED driven from a electronic VU meter, is there a way to have the led remain on (for approx 5 sec) when ill...
21 comments posted 20yrs
posted by ksleep
21 comments posted 20yrs posted by ksleep

Microwave Bonding

Dear All We want to feed in Microwaves (about 5 GHz) into a micron-sized CPW (made out of Gold). How does one bond thes...
1 comments posted 20yrs
posted by =5F-=3D=B0NoSPAM=B0=3D-=5Fpasc
1 comments posted 20yrs posted by =5F-=3D=B0NoSPAM=B0=3D-=5Fpasc

toroidial transformer winding question

I have several toroidial transformers that have two 115v windings and two 25v windings on each. The way I understand el...
25 comments posted 20yrs
posted by cwaugs
25 comments posted 20yrs posted by cwaugs

Electronics supplier in Europe?

Any recommendation on an lowpriced electronics supplier in Europe ..? Need things like ether-transformer, ether-phy, po...
3 comments posted 20yrs
posted by pbdelete
3 comments posted 20yrs posted by pbdelete

NPN sensor to TTL input

I got a ST L294 solenoid driver and I am stuck on the enable input (TTL) currently using a sunx cx-24 @ 5v supply. The...
13 comments posted 20yrs
posted by jim_sveta
13 comments posted 20yrs posted by jim_sveta

The right thing of measuring leakage inductance?

Hi all, I want to know what is the right thing to measure leakage inductance, A or B? Check this out: http://my.dreamwiz...
1 comments posted 20yrs
posted by bob2a
1 comments posted 20yrs posted by bob2a