Electronics Forum / Basics / October 2007

I'm extremely confused.
I have a part SN74LVC8T245 that I'm trying to find a footprint for.
I know the part is ssop so I assume its a sop in general. On the datasheet
they list many of the packages and I know that my part is DBZ, of course

hello to all group members,
                                       please tell me were i can get
a small ultrasonic driller for drill holes in hard granite stones with
the depth of 2 inches and the diameter of holes is 5m.m to 10 m.m.that

I'm trying to learn about electronics as a hobby. Far too often, I'm
exploring a hobby (flashlights, photography, etc.) and I run into DIY
projects that involve electronics. And I hit a roadblock here because,
even though I can buy the parts and wire them together (albeit,

I'm relatively new to electronics and I'm trying to understand the
following circuit:
http://elm-chan.org/works/vlp/ldpctl2.png
It's to control a laser galvanometer X/Y.

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Is it necesary to repair lifted traces/pads ?
its actually a pad at the end of a trace to mount a wire/pin
connection to another board (not a hole)
if one does need to repair then  how does one ree-glue or repair

I just moved into a house which has an automatic garage door opener
installed. However the previous owners did not leave any of the
controllers/clickers. The receiver is from JC Penny and my guess is it
is at least 30 years old. It works fine so I would have to replace it,

1) I have a stepper motor in mind :
http://tinyurl.com/2qr4d9
I'm guessing since it has 6 wires that it has 2 coils.  But should
that not mean it has 4 phases.  Why do they list it as a "2 phase

How are the pins of a mosfet identified please.
The project requires a 45V/16A Schottky diode or similar.  I cannot find a
supplier.  What is special about a Schottky diode?  Can I use smaller diodes
wired in parallel?

I've been looking into getting a microcontroller kit to start learning
about them. Preferably to be programmed in BASIC.
The problem is I don't know where I can go in my city to buy such a kit.
I'd rather not mail order - I'd rather buy something locally.

Hey all;
I've got a scratchy noise in my tube guitar amp. I suspect it's emanating
somewhere from the power amp section, as it is present in both channels, and
doesn't increase in volume when the volume is turned up. Before I get into

What is the recommended procedure for measuring low resistances?
My DMM seems to wander all over the place depending on how I hold the
probes against the conductors. Is there a better method? It's
autoranging, so I don't know what range it's working with.

Resistors are rated by 2 parameters: ohms and (W). Capacitors are rated in
(C) and (V).
It's taught to make sure that (W) doesn't exceed the resistor's power rating,
which takes (I) into calculation, but capacitors are only chosen by their

how can i repair my mobile phone selfly ?is there any help about that
can you guide me regarding this