Hobby Electronics Basics

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Laptop Power Supply

Will I damage my laptop if I use a power supply rated at 16 volts rather than the 20 volts (same amp) that came with it...
4 comments posted 19yrs
posted by rickj
4 comments posted 19yrs posted by rickj

Is this a time-delay or 'slo-blo' fuse?

I have a blown fuse here, 5mm x 20mm. It is marked 250v 315ma. On the inside, it has what looks like a metal film resis...
16 comments posted 19yrs
posted by blahbleh666
16 comments posted 19yrs posted by blahbleh666

Need display design help

Hi all, I haven't designed a circuit in the past 15 years and need some help. I'm into aircraft avionics and want to bu...
35 comments posted 19yrs
posted by bonanzaman
35 comments posted 19yrs posted by bonanzaman

BRINKMAN SOLAR SPOTLIGHT SL-7--Alternative?

The light in the Subject doesn't seem to robust and is generally a bit over priced. I've had one for about 5-6 years, a...
2 comments posted 19yrs
posted by wolf_tracks
2 comments posted 19yrs posted by wolf_tracks

Handset telephone amplifier

Hi, I have to build a telephone handset amplifier which has to amplify both the speaker on the ear (incoming sound) and...
16 comments posted 19yrs
posted by no.spam
16 comments posted 19yrs posted by no.spam

Make + and - 12V from 24VDC?

Anyone have any simple circuits on how to make +/- 12VDC from 0-24VDC? I would just take a center-tapped transformer, b...
6 comments posted 19yrs
posted by mrdarrett
6 comments posted 19yrs posted by mrdarrett

temperature compensated BJT current source/sink

I'm considering the idea of compensating a BJT current source (or sink) for temperature variation. I haven't read any d...
12 comments posted 19yrs
posted by jkirwan
12 comments posted 19yrs posted by jkirwan

Req: The benefit of your sagacity

Is there a source of information you can recommend that deals with the more escoteric aspects of component selection? I...
9 comments posted 19yrs
posted by gregor
9 comments posted 19yrs posted by gregor

oscilloscope probes VS BNC cable

Hi, Is BNC cable is appropiate cable to make oscilloscope readings or oscilloscope probes? My co-worker is insisting th...
11 comments posted 19yrs
posted by conphiloso
11 comments posted 19yrs posted by conphiloso

modify mp3 player for continious play

Is it possible to modify an MP3 player (I have one of those stick-shaped mp3 players to play with) so it plays a music...
3 comments posted 19yrs
posted by dave
3 comments posted 19yrs posted by dave

Electric bug zapper

I had one of those bug zapper things that looks like a mini tennis racket only with a wire mesh. It ran on a 9v battery...
2 comments posted 19yrs
posted by nomail
2 comments posted 19yrs posted by nomail

China PCB Factory

Wonder Electronic Technology Co. Ltd is an advanced venture in Guangzhou. It mainly develops, manufactures and sells hi...
1 comments posted 19yrs
posted by lizhiren
1 comments posted 19yrs posted by lizhiren

XRF analyzer?

Just out of random curiosity (no need for salesmen to contact me), what sort of price do the handheld XRF analyzers out...
0 comments posted 19yrs
posted by tomhorsley
0 comments posted 19yrs posted by tomhorsley