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clipka wrote:
> Am 23.05.2010 12:41, schrieb Orchid XP v8:
>
>> I took a trip to Maplin and somehow spent £25 - which is impressi
ve,
>> given that a 74HC00 is a mere £0.79 (for example).
>
> No, actually it's not - once you get used to this effect :-P
Indeed, one of my own big insights was "Wow, I can use the computer for
another project, if I write *software*!" ;-)
> Pre-cut wires?
And I would think if you're getting pre-cut breadboard wires, you *want*
them to be stiff.
--
Darren New, San Diego CA, USA (PST)
Ada - the programming language trying to avoid
you literally shooting yourself in the foot.
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>> Pre-cut wires?
>
> And I would think if you're getting pre-cut breadboard wires, you *want*
> them to be stiff.
I have now cut some flexible wire, and it works quite well. (In
particular, it can go around corners...)
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Hmm, this isn't going to work at all, is it?
Post a reply to this message
Attachments:
Download 'logic1.png' (7 KB)
Preview of image 'logic1.png'
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PS. MS Word is utterly *horrible* at drawing circuit diagrams... (But I
guess you probably knew that already.)
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On 5/23/2010 9:24 AM, Orchid XP v8 wrote:
>> Why not?
>
> Because when it doesn't work, I will probably end up killing myself, for
> starters... A power supply is far too complicated for me to get right.
>
A power supply is a rather simple device: A transformer that steps down
the 240VAC to (for example) 12VAC, a bridge rectifier to convert the AC
source into DC then a couple regulators to get (perhaps) 5 and 12 volts.
Personally, though I'm a bit skittish about using wall power, I use an
AC adapter w/12 volts (though the one powering my headphone amp is 24v
regulated, so the op-amp gets +/- 12v much more than is ever needed for
boosting heaphones, but gives the op amp plenty of headroom to source
current for the low impedance phones I have)
... One of these days I'll upgrade it to an op-amp w/ a mosfet output
stage so I can get as much current as I can, even though this is plenty
loud ;)
--
~Mike
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On 5/23/2010 9:50 AM, Stephen wrote:
> LOL, They get them from work ;-)
For a minute there I thought you were going to say you picked them off
of discarded electronics.
--
~Mike
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>>> Why not?
>>
>> Because when it doesn't work, I will probably end up killing myself, for
>> starters... A power supply is far too complicated for me to get right.
>>
>
> A power supply is a rather simple device: A transformer that steps down
> the 240VAC to (for example) 12VAC, a bridge rectifier to convert the AC
> source into DC then a couple regulators to get (perhaps) 5 and 12 volts.
...or I could use one assembled by professionals who actually know what
they're doing. ;-)
I don't mind destroying a few 29p LEDs by accident, but I'd really
rather not die a virgin...
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On 5/23/2010 6:10 AM, Orchid XP v8 wrote:
>>
>> No, actually it's not - once you get used to this effect :-P
>
> Yeah, it's like that time I was on Amazon, and I saw a textbook for,
> actually 20 books...
>
> by a suitably big number, becomes a *big* total. ;-)
>
>> Pre-cut wires? Gee, you must have too much money to spend ;-) (or
>> suffering from an utter lack of time... duh, thinking about it, it
>> somehow makes sense after all... >_<)
>
> Well, I don't know where my soldering iron, solder or wire cutters are.
> And I know from experience that trying to strip wires is approximately
> for a nice set of wires with a box to keep them in wasn't bad.
This is why you buy solid wire and not stranded! Though I have learned
that stranded is the best choice for hooking up external peripherals to
your circuit, when used in a project.
For extra fun, do something like this:
http://www.flickr.com/photos/87959461@N00/4469974973/
http://www.flickr.com/photos/87959461@N00/4470754768/
I learned a pretty important lesson with this project:
Put the jumpers on the component side, and use stranded wire for the
external parts (jacks, pot, power and LED) the solid wire made install
into the enclosure a royal pain.
A breakout board for a 14-segment display. (The title is incorrect):
http://www.flickr.com/photos/87959461@N00/4487754588/
> colours...)
>
Copper isn't cheap....
--
~Mike
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>>> Pre-cut wires? Gee, you must have too much money to spend ;-) (or
>>> suffering from an utter lack of time... duh, thinking about it, it
>>> somehow makes sense after all... >_<)
>>
>> Well, I don't know where my soldering iron, solder or wire cutters are.
>> And I know from experience that trying to strip wires is approximately
>> for a nice set of wires with a box to keep them in wasn't bad.
>
> This is why you buy solid wire and not stranded!
Trouble is, you just can't *bend* the stuff! It's like trying so connect
components together with a coat hanger...
(Although, I bought 4 chunks of wire, and one of them actually *is*
single-core wire. While it's rather rigid, it's not quite as bad as the
other stuff.)
>> colours...)
>>
>
> Copper isn't cheap....
And 10 m of wire weighs, what, about 10 grams?
Oddly, both the single-strand and multi-strand cables appear to contain
some kind of white metal, not copper.
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On 5/24/2010 8:30 AM, Invisible wrote:
>
> ...or I could use one assembled by professionals who actually know what
> they're doing. ;-)
>
pff.. I did that, was highly dissatisfied with the result, and the thing
ran on batteries, which was inconvenient. So, I built one to my own
requirements. :D
--
~Mike
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