Perfboard / Stripboard challenge

bubzy · Posted: Sun Nov 18, 2012 12:50 am Post subject: Perfboard / Stripboard challenge

yesterday, while waiting for my iron to heat up, I noticed an offcut of perfboard that had chipped off an edge when i was cutting it, while I was absent-mindedly staring at it, I wondered what i could build on that small piece, then I wondered what any of you guys could make too.

therefore, I challenge everyone to make a circuit that:

1) makes noise!!!
2) takes up NO MORE than 30 holes on perf/stripboard

there are no prizes for this challenge (because im broke Razz

)

look forward to seeing your builds.

-minus- · Joined: Oct 26, 2008 Posts: 787 Audio files: 13

What a good idea. I have a box of little pieces of stripboard here. So just to be clear, with 30 holes, that could be a 6 hole by 5 strip board right? Question

bubzy · Posted: Sun Nov 18, 2012 1:11 am Post subject:

PHOBoS · Posted: Sun Nov 18, 2012 3:33 am Post subject:

hmm, I guess I have to do this,.. right ?
I mean it's a PEFRBOARD challenge,

damn you!

Uncle Krunkus · Posted: Sun Nov 18, 2012 5:27 am Post subject:

But if you didn't need a hole/s could you drill it out and drop the hole count!? Twisted Evil

bubzy · Posted: Sun Nov 18, 2012 5:54 am Post subject:

i think if you drill a hole it becomes another hole Razz

-minus- · Joined: Oct 26, 2008 Posts: 787 Audio files: 13

I think no piggy-backing components should be a rule... and no off the board component wiring... no sculptural open space wiring, point to point or whatever it is called. That would be defeating the purpose. Not much room on that size board. Hopefully this will get beyond a load of two transistor multivibrators.

PHOBoS · Posted: Sun Nov 18, 2012 6:41 am Post subject:

JovianPyx · Posted: Sun Nov 18, 2012 6:58 am Post subject:

Can't fit a dsPIC on that... Sad

-minus- · Joined: Oct 26, 2008 Posts: 787 Audio files: 13

It doesn't really leave much left, does it? Laughing

We could always go and buy a load of musical greetings cards and hack them or use flashing led's.

http://www.evilmadscientist.com/2011/does-this-led-sound-funny-to-you/

PHOBoS · Posted: Sun Nov 18, 2012 7:06 am Post subject:

-minus- · Joined: Oct 26, 2008 Posts: 787 Audio files: 13

I think we will all just have to make our own parameters up for ourselves. It's 30 holes of stripboard. I'm going to try do it in 3! Shocked

vladosh · Posted: Sun Nov 18, 2012 4:33 pm Post subject:

it's impossible! Shocked

vladosh · Posted: Sun Nov 18, 2012 4:34 pm Post subject:

if we invite people to the contest do we get more strips Very Happy

PHOBoS

played a bit more with a 2 transistor AMV,

replaced resistors with LDR's, changed the circuit a bit and to my surprise I got it oscillating with 1 capacitor. Very Happy

didn't realize how small 30 holes actually was untill I cut the perf Shocked

the design was a bit trickier then I expected too,
but I managed to get it on there.

the 4 pins it stands on do have a function, 2 are for power, the other 2 are connected together and can be used
as a line out.

nice perferted challenge bubzy! Laughing

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PHOBoS · Posted: Sun Nov 18, 2012 8:03 pm Post subject: Perfertorator schematic

and the schematic.

I'll see if I can make a video,. or at least record some sound.

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-minus- · Joined: Oct 26, 2008 Posts: 787 Audio files: 13

Well done! Looks good... like a little bunch of electronic mushrooms. Some sound recording would be nice Wink

.

It does pretty much come down to transistors. There isn't room for an IC... unless you want to go opening the cases. Of course there is the option of making your own custom components if that is not cheating.

EDIT: also, there is a distinct advantage with perf. You don't need to sacrifice holes to make a break in the track.

PHOBoS · Posted: Sun Nov 18, 2012 9:20 pm Post subject:

slacker · Posted: Mon Nov 19, 2012 11:56 am Post subject:

You could stand an opamp or other 8 pin DIP on its side making it only 2 holes wide on perf or 3 on vero. You could get it 2 on vero if you made trace cuts between holes rather than through them, or would that be cheating?
The same trickery would just about allow a 14 pin DIP for some CMOS fun.

bubzy · Posted: Mon Nov 19, 2012 1:26 pm Post subject:

Edit:
after rereading slackers post......

i cant see why we cannot "creatively" mount components, so long as we dont reduce the number of holes they use. i think reducing the number of holes they "waste" is PERFectly acceptable.

Cynosure · Posted: Mon Nov 19, 2012 3:10 pm Post subject:

An atmega328 is only 28 holes Razz

bubzy · Posted: Tue Nov 20, 2012 12:01 am Post subject:

transponderfish · Joined: Feb 09, 2012 Posts: 17 Location: 3rd from the sun

Possibly the ILC (International Lunettic Committee) will reject my entry because
- in two places a hole is used twice (the wires on AA and FB)
- one component (C2) is half-offboard
- the circuit is not my design, it is a Sudo-Mini by John Richards (http://www.dirtyelectronics.org/docs/sudomini.zip)
- I have not built and veryfied it yet.

But as it is about taking part, not about to win, here it is (24 holes): Smile

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bubzy · Posted: Sat Nov 24, 2012 2:56 pm Post subject:

we may accept it, if you post some sound samples

bubzy (ilc)

-minus- · Joined: Oct 26, 2008 Posts: 787 Audio files: 13

No seriously, F*** the ILC! They are all Flat Earthers. Laughing

At 24 holes if you went down the perf route you could add another 4 and fit that cap on could you not? Although part of its charm is the cap hanging over the side.