Re: New to electronics.

On Sat, 14 May 2005 09:15:37 GMT, "anon" <anon@xxxxxxxxxxxxx> wrote:

>Hi to all
>
>I'm just getting into electronics as a hobby because i've had to retire from
>work due to illness and thought i could do with something interesting to pass
>the time.
>
>I've decided to try my hand at some "breadboarding" to start me off.
>
>I saw a link for http://www.doctronics.co.uk/index.htm in one of these
>electronics newsgroups, so i had a look to find out if the website would be of
>any use to me.
>
>I noticed a project for a games timer which i thought i'd try my hand at. I sent
>off for the components, complete with instructions, and bought myself a couple
>of breadboards and some other bits and pieces to start me off.
>
>On ebay, i saw a new (and fairly cheap), bench top power supply which i thought
>would be better than having to keep buying batteries for the various projects
>that i would be undertaking.
>It is switchable between 3, 4.5, 6, 7.5, 9 and 12volts dc. The current rating is
>1500ma max.
>
>I was just wondering, as i'm new to electronics. Would the current of 1500ma
>max, be flowing whatever the voltage might be (ie: 3, 4.5, 6, 7.5, 9 or 12volts
>dc) - or would the current flow be dependent on the components being used in the
>circuit, upto a maximum of 1500ma using the above power supply ?.
>
>
>Thanks in advance for any help with this question.
>
>
>hermit50
>


Here's my list:

Breadboard-hookup wire-wire cutters-wire stripper

Digital VOM-cheap one-let's you measure the 3 variables in Ohm's
Law-volts, ohms, amps. Gotta know Ohms law. The cornerstone of the
electronics building.

Good NiMH battery charger with AA size NiMH batteries. I use a Power
Port Model BC-101-U. Individually charges up to 4 AA or AAA batteries
at one time, based on deltaV/deltaT. Batteries can also be used for
all the other battery-powered things around the house.

Battery holders for the above. 1/2/3/4 battery capacities available.
Lets you experiment with various voltages and power your early
breadboard projects. 99% of your first efforts can be handled with
either 5 volts(4 AA batteries, 4.8-5.2 volts, depending on charge
state) or a 9 volt alkaline.

A sprinkling of 1/2 watt resistors, spanning the range of 10 ohms to
10 megohms. ~$0.05 ea.

Various-colored LEDs. ~$0.05 ea.

This will give you enough to learn about Ohms law, the correct way to
wire in some LEDs and figure the resistor required for it to work
without letting the magic smoke out, etc. Besides Ohms law, read
about how to figure DC power. Later, you'll want to read about
building your own power supply using a "wall wort", couple of
capactitors and a 7805 voltage regulator chip.

Welcome to the fray.

Cheers!
Charlie

.

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