Hobby Electronics Basics

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Tube Headphone Amp Schematic Needed

I want to build a headphone amp to connect to my laptop's audio output, and thought a tube based one would be a nice ch...
22 comments posted 18yrs
posted by the1930s
22 comments posted 18yrs posted by the1930s

A Compromised Reasoning Ability

> >> >Three months and $100,000 in diesel to plow a field? > >> As I recall, someone verified that the 1/2 MPH was corr...
8 comments posted 18yrs
posted by BretCahill
8 comments posted 18yrs posted by BretCahill

Optimizing Interdisciplinarity

> > > InnoCentive found that =93the further the problem was from the > > > solver=92s expertise, the > > > : more likel...
11 comments posted 18yrs
posted by BretCahill
11 comments posted 18yrs posted by BretCahill

Justifying Yer Existence

> You are quite the rabid dog, aren't you? If you or, for that matter, anyone else wants a pat on the head you'll need...
21 comments posted 18yrs
posted by BretCahill
21 comments posted 18yrs posted by BretCahill

S-R latch

Hi , the following is the implementation of S-R latch which i saw in a book, http://i297.photobucket.com/albums/mm220/s...
2 comments posted 18yrs
posted by sophia.agnes
2 comments posted 18yrs posted by sophia.agnes

LEI-4 transformer

Hi - I yanked some parts from an old APC unit - a 350 (I think). A chunky transformer has markings of LEI-4, 430-2020 a...
0 comments posted 18yrs
posted by huwdixon
0 comments posted 18yrs posted by huwdixon

How to add 12v lamps to circuit?

http://www.stephenhobley.com/sound.jpg I have this circuit, the standard Velleman mk103 sound to light kit. I would lik...
3 comments posted 18yrs
posted by shobley
3 comments posted 18yrs posted by shobley

Power supply to run camera and 555 timer

I'm looking for ideas for building a power supply (out of batteries) bank that will run a 555 timer circuit and a Kodak...
1 comments posted 18yrs
posted by DorkyGrin
1 comments posted 18yrs posted by DorkyGrin

Continuous Operation From Grid-Battery Tractors

Diesel power is now almost 4X the cost of the grid. Battery cost is 2X - 3X grid cost and the combination is just now a...
21 comments posted 18yrs
posted by BretCahill
21 comments posted 18yrs posted by BretCahill

power supplies

I've got a couple of AC/DC power adapters that went to various things that are no longer around. They have various outp...
6 comments posted 18yrs
posted by huwdixon
6 comments posted 18yrs posted by huwdixon

MATERIAL MAY HELP AUTOS TURN HEAT INTO ELECTRICITY

Researchers have invented a new material that will make cars even more efficient, by converting heat wasted through engi...
1 comments posted 18yrs
posted by mathew.thomas21
1 comments posted 18yrs posted by mathew.thomas21

LED info

Stupid question probably but what does the (T1) specification for LED's mean? H. Dixon
5 comments posted 18yrs
posted by huwdixon
5 comments posted 18yrs posted by huwdixon

Cleaning a Female BNC Coax Connector?

The male and female parts of the connector are used together outdoors. There's no trouble disconnecting them, but they...
2 comments posted 18yrs
posted by notvalid2
2 comments posted 18yrs posted by notvalid2