Hobby Electronics Basics

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Do globes care about AC or DC?

Hi, If I have a 12V globe (or any voltage for that matter), does the globe "care" whether it is run on AC or DC? "Care"...
15 comments posted 21yrs
posted by newspaper.20.broom
15 comments posted 21yrs posted by newspaper.20.broom

LED Question

What's the difference between "max continuous current" and "rated current"? I have leds with 30MA for the former and 10...
2 comments posted 21yrs
posted by nl
2 comments posted 21yrs posted by nl

Metal film resistor stability over time

What resistance change can be expected over time using 5% metal film 1/4 watt resistors? If I select a couple 5% metal...
6 comments posted 21yrs
posted by wrongaddress
6 comments posted 21yrs posted by wrongaddress

WTB: Kanebo PAS621R or substitute for Sony Clie

The Sony Clie SL10 uses Kanebo PAS621R polyacene cells for backup power. I need to replace these cells. Can anyone tell...
2 comments posted 21yrs
posted by devnull
2 comments posted 21yrs posted by devnull

Using a Karnaugh map I need to

I wants to convert my old hot tub controller, wich is currently using relays, to more reliable TTL gates (solid state)...
24 comments posted 21yrs
posted by Lost
24 comments posted 21yrs posted by Lost

Motor generator

Part II of "Generator for LEDs" I grabbed out some stepper motors and a couple of magnet DC motors and hooked them to t...
17 comments posted 21yrs
posted by quakeserver149
17 comments posted 21yrs posted by quakeserver149

Source for Switches

For my project I need some switches that I would like to have semi- decorative. I will need about 10 switches in total....
8 comments posted 21yrs
posted by ivan
8 comments posted 21yrs posted by ivan

Soldering: Need Two More Hands

Okay, There's the soldering iron, the wire, the solder, and the work. How the hell do you guys do it.(I was only born w...
8 comments posted 21yrs
posted by Searcher7
8 comments posted 21yrs posted by Searcher7

How much current can my small transformer provide?

Hi, I have a tiny isolated mains transformer with one primary winding described as 230V, and two secondary taps, both r...
7 comments posted 21yrs
posted by erik1969
7 comments posted 21yrs posted by erik1969

RMS to DC scheme

Hi! I need scheme of RMS to DC converter. What is important I can`t use integrated circuits (except opamps) in this appr...
7 comments posted 21yrs
posted by lemonekpl
7 comments posted 21yrs posted by lemonekpl

Motion Sensor

Ok, heres the deal. I live in a very small apartment complex and where i park is quite secluded. Last night, my car cov...
8 comments posted 21yrs
posted by dakota39l
8 comments posted 21yrs posted by dakota39l

What is a "Polysorb"?

Hello, I saw a schematic for that had conditioning for a 12v source that had a component on the source in side that was...
1 comments posted 21yrs
posted by earcher
1 comments posted 21yrs posted by earcher

voltages and air flow sensor

I have an air flow sensor on my car. Does it follow that if all the input and output voltages are correct, then the circ...
6 comments posted 21yrs
posted by not_here.5.species8350
6 comments posted 21yrs posted by not_here.5.species8350

402-425 nm LEDs

Does anyone know where I can get LEDs that emit in this range in small quantities?
3 comments posted 21yrs
posted by leon.park
3 comments posted 21yrs posted by leon.park