Hobby Electronics Basics

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Antenna question

The other day I posted a few pictures of this dish like antenna I took from my parents roof. If you live in Sydney you'...
2 comments posted 21yrs
posted by mr
2 comments posted 21yrs posted by mr

OT: Quiz - more suggestions?

I'm compiling a few familiar quizzes for the family at Christmas, probably entirely unoriginal. I've copied the first b...
12 comments posted 21yrs
posted by terrypinDELETE
12 comments posted 21yrs posted by terrypinDELETE

intensity of radio em field

I am planning to buy a home weather station with a remote temperature sensor (wireless, ie using radio transmission at...
4 comments posted 21yrs
posted by salvor.hardin
4 comments posted 21yrs posted by salvor.hardin

Urgent need help

Sorry for cross posting but I need instant response. My assignment is due this wednesday and wondering someone would he...
3 comments posted 21yrs
posted by jl
3 comments posted 21yrs posted by jl

Headphone to RCA

I'm looking to interface the headphone jack on my laptop with an RCA jack on my TV. I already have a cable that goes fr...
2 comments posted 21yrs
posted by trogadoror
2 comments posted 21yrs posted by trogadoror

Antene

Howdy I have an Antene here and I know it can be used for something. It would be good to be able to pickup other statio...
8 comments posted 21yrs
posted by mr
8 comments posted 21yrs posted by mr

7805 regulator question

There was not enough explanation on the spec sheet for me to understand its full workings: How high an input voltage do...
2 comments posted 21yrs
posted by cprstn54zz
2 comments posted 21yrs posted by cprstn54zz

Bargain Optocouplers

I picked up some optocouplers cheap from the bargain bin. I was expecting to find 4 useful pins (2 in, 2 out, 2NC), but...
5 comments posted 21yrs
posted by chrish57
5 comments posted 21yrs posted by chrish57

Coil driver efficiency

I need to drive a 5K coil with a single or dual op amp. Can anyone provide a brief summary of available design options...
5 comments posted 21yrs
posted by jstern
5 comments posted 21yrs posted by jstern

wet-cell battery gravity test

A while back, I had a brand new battery that sat for a long time, eventually loosing its charge. It was slow-charged fo...
6 comments posted 21yrs
posted by no_spam
6 comments posted 21yrs posted by no_spam

CAD Program

Is there a relatively easy CAD program. I need to model some 3d shapes so I can see how they fit together. I've been us...
4 comments posted 21yrs
posted by webmaster
4 comments posted 21yrs posted by webmaster

black & decker

anyone have a power supply for a b&d cordless drill the model number of the power supply is PS-180 I would like to know...
2 comments posted 21yrs
posted by lurk
2 comments posted 21yrs posted by lurk

electronic safety

Dear all: Iam trying to help someone fix an old x-box game console - however I do not have any background on electronic...
2 comments posted 21yrs
posted by simplitia
2 comments posted 21yrs posted by simplitia

Voltage Shifting Question

I've been looking at a circuit which produces sawtooth oscillations. It does this by sending a constant current to a ca...
4 comments posted 21yrs
posted by concentricnews
4 comments posted 21yrs posted by concentricnews

Pi Network & S - parameters

Hi, I am new in the RF field and I have a question regarding Pi Networks and S parameters. I was recently reading an ar...
1 comments posted 21yrs
posted by genenamg
1 comments posted 21yrs posted by genenamg