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/diy/ - Do It Yourself

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Anonymous Fri Aug 15 12:03:52 2014 No.682186 [DELETED]

[Reply] [Original]

I went yard sailing to find electronic components to salvage for projects. The guy at the sale has no idea what this is. Scientology thetan meter? What the fuck did I just buy???

>>	Swifts !WiNDUPyWhk Fri Aug 15 12:10:59 2014 No.682192 >>682186 http://en.wikipedia.org/wiki/Thetan

>>	Swifts !WiNDUPyWhk Fri Aug 15 12:12:07 2014 No.682193 I'm assuming it's some kind of soul meter or ghost detector.

>>	Anonymous Fri Aug 15 12:23:07 2014 No.682195 File: 20 KB, 575x715, lie detector.gif [View same] [iqdb] [saucenao] [google] more likely, someone built a lie detector. or tried.

>>	Anonymous Fri Aug 15 12:29:25 2014 No.682199 >>682186 Can you get a closer shot of the IC or post the numbers on it?

>>	Anonymous Fri Aug 15 12:30:22 2014 No.682200 >>6821986 I didn't even think of that. When I first saw it, I thought of Napoleon dynamite and that scene where he racks his balls on a fake time machine that runs on crystals

>>	Anonymous Fri Aug 15 12:31:30 2014 No.682202 >>682195 ... which, incidentally, isn't that much different from thr scientologists' magic meter.

>>	Anonymous Fri Aug 15 12:33:19 2014 No.682205 >>682195 No transistors, only a DIP8 chip, a bunch of ceramic caps and some resistors. But I agree, it might be a lie detector built around an op-amp. OP, post up a clear, high res pic of the top and bottom of the board.

Anonymous Fri Aug 15 12:38:40 2014 No.682210

>>682199
Til we get that shot of the IC, I'm gonna guess it's a 555 timer judging by how it's wired up. It's hard to trace the circuit without seeing the bottom of the board, but it looks like the LED will maybe blink (possibly really fast depending on the value of that big orange capacitor, so it looks like it's burning steady at different brightnesses depending on other stuff) unless you grab both handles, which would pull the output on pin 3 closer to ground and maybe bring it below the turn-on threshold

>>	Anonymous Fri Aug 15 12:40:31 2014 No.682211 File: 1.28 MB, 3264x1836, IMG_20140815_123524_843.jpg [View same] [iqdb] [saucenao] [google] Chip says MAL NE 555N J4H748 best pic I can get. Bottom of board incoming. I'm a noob with components and circuits btw.

>>	Anonymous Fri Aug 15 12:42:00 2014 No.682212 File: 1.38 MB, 3264x1836, IMG_20140815_123541_526.jpg [View same] [iqdb] [saucenao] [google] Bottom. Its hooked to a 9v battery btw

Anonymous Fri Aug 15 12:42:49 2014 No.682214

OP, I've got an assortment of DIP8 ICs lying around along with probably all of the other components in that thing. I could breadboard one real quick and see if it does anything interesting if you can get a better shot of the board, maybe the bottom of the board too if there are any jumpers, which from what i see there would probably have to be. I'd assume it's a 9V battery in the bottom box.

Very bored electronicsfag reporting in.

Anonymous Fri Aug 15 12:47:02 2014 No.682216

>>682211
HAHA I was right! Yeah, looks like the thing is supposed to measure body conductance and use the brightness of the LED as an indicator. I don't see it working too well though. Not sensitive enough. The signal going through those resistors would go between 9v and ground depending on the resistance between the two handles. A human is pretty much ground compared to a 9v battery in any case.

>>	Anonymous Fri Aug 15 12:47:08 2014 No.682217 The light stays on constant with no blinking and if I grip them nothing at all happens. Was just kind of curious. Seems like a silly experiment to me.

>>	Anonymous Fri Aug 15 12:48:40 2014 No.682219 >>682217 Short those resistors and something might happen when you grip. Just maybe.

>>	Anonymous Fri Aug 15 12:51:05 2014 No.682221 >>682217 Also if that ceramic is bad the IC won't oscillate. It'll just put out a steady voltage. If there's blinking it's probably too fast to see. You'd see the rate as a change in brightness on the LED.

Anonymous Fri Aug 15 12:53:40 2014 No.682223

>>682216
Thanks anon. I'll accept that answer. Haven't been on diy much, but I will have to lurk around here more. Been having fun working on a portable old school nes lately and it reminded me how much fun it is to work with electronics. I have built a mame cabinet and rebuilt an old donkey Kong machine. Thanks DIY.

>>	Anonymous Fri Aug 15 12:56:08 2014 No.682226 >>682219 I'll give that a try later when I get out of work. If this thread still lives I'll post again

>>	Anonymous Fri Aug 15 12:56:32 2014 No.682227 File: 3 KB, 370x297, 555astable.gif [View same] [iqdb] [saucenao] [google] >>682223 This should help you figure out what it's supposed to do.

>>	Anonymous Fri Aug 15 13:01:12 2014 No.682232 >>682227 Nice. Thanks.

Anonymous Fri Aug 15 13:32:12 2014 No.682249

I was just thinking, maybe we're looking at this the wrong way around. Maybe the LED is just an on/off indicator. If one of the probes is tied to ground, and the other one ends up ultimately on pin 3 of the 555, there would be a ~9v peak-to-peak pulse at probably a pretty high frequency between the probes. Electrotherapy quackery?

Anonymous Fri Aug 15 13:47:01 2014 No.682257

Anyway, once the mystery is solved, if you decide to scrap this baby, you can get some cool beeps and boops out of that IC running it in astable mode into an amplifier. Change out C for bigger values for lower frequencies, and you can put a pot between C and ground to tune it.

>>	Anonymous Fri Aug 15 14:54:08 2014 No.682278 File: 128 KB, 625x233, idiocracy-quotes-doctor-image-search-results-130815.jpg [View same] [iqdb] [saucenao] [google] >>682186 I know i'm late to the party but I'm pretty sure one of those is meant to go up your butt.

>>	Anonymous Fri Aug 15 22:46:17 2014 No.682530 OP here. I think I'm gonna scrap this and use the 555 toward making an Atari Punk console. (synth instrument) the project looks accessible at my current level, and I could make some fun noises with it.

>>	Anonymous Sat Aug 16 00:00:27 2014 No.682557 >>682212 EWWW ITS THE GROSSEST SOLDER JOB I'VE EVER SEEN EVER

>>	Anonymous Sat Aug 16 00:09:20 2014 No.682565 Electronic parts seller here. I have had people come in and buy parts for these. Its some sort of snake oil bs that is supposed to cure cancer or similar. When you ask them what it is they mostly try and avoid the question.

>>	Anonymous Sat Aug 16 00:12:41 2014 No.682569 >>682565 what store? how cheap can I get shit there?

>>	Anonymous Sat Aug 16 01:48:39 2014 No.682625 File: 167 KB, 881x907, Clarinotboards.jpg [View same] [iqdb] [saucenao] [google] >>682278 This~!!! Use the 555 for at bare-minimum Atari Punk Console....

>>	Anonymous Sat Aug 16 03:03:38 2014 No.682639 a 555timer, a RC time constant, and potentiomiter (hand holding rods) Sir, this well tell you how conductive you are based on how fast the light flashes. Sounds like something from Scientology.

>>	Anonymous Sat Aug 16 04:02:27 2014 No.682648 >>682186 Looks like a time machine op, make sure you have the right crystals before staring it.

>>	Anonymous Sat Aug 16 16:48:24 2014 No.682863 File: 20 KB, 300x200, image.jpg [View same] [iqdb] [saucenao] [google] >yard sailing Ha!

OP Sat Aug 16 16:57:18 2014 No.682865

>>682639
The time constant will be too short with those caps, and I think OP determined the two resisters coming off of pin 3 keep the output of the 555 from getting close enough to ground to affect anything. I'm going with this
>>682565
It looks like it's supposed to send a pulse between the two probes to do some kind of electrotherapy thing. The LED doesn't do much other than stay on when you turn the gadget on.

>>	not OP Sat Aug 16 17:33:13 2014 No.682880 >>682865 >resistor and sorry, I'm not OP

>>	Anonymous Sun Aug 17 15:19:29 2014 No.683308 File: 599 KB, 1504x1416, 1340921863718.jpg [View same] [iqdb] [saucenao] [google] >>682186 i was thinking, pain electrotherapy device but then i found this... https://www.youtube.com/watch?v=Ydwj9dKlOgI butthurt therapy machine

>>	Anonymous Sun Aug 17 15:29:22 2014 No.683313 I saw this, is a 555 scam machine. http://www.555-timer-circuits.com/clark-zapper.html

>>	Anonymous Sun Aug 17 15:31:43 2014 No.683315 >>683308 looool

>>	Anonymous Sun Aug 17 15:49:13 2014 No.683318 File: 134 KB, 600x468, 1374762227595.jpg [View same] [iqdb] [saucenao] [google] >>683308 This picture is actual gold.

>>	Anonymous Sun Aug 17 16:00:08 2014 No.683324 File: 70 KB, 652x484, 1337879618.jpg [View same] [iqdb] [saucenao] [google] >>683308 Sorry for derailing thread but since winrar >>683313 i dont think it matters anymore

>>	Anonymous Sun Aug 17 16:00:39 2014 No.683325 >>683313 Nice find. That's what I was thinking it was.

>>	Anonymous Sun Aug 17 21:46:03 2014 No.683431 Some type of biofeedback device. skins resistance should (depends on dryness of skin) change the flash rate of the led.

>>	Anonymous Sun Aug 17 22:50:30 2014 No.683445 File: 151 KB, 908x814, wallet zapper.jpg [View same] [iqdb] [saucenao] [google] >>683313 i'm reading about this zapper business and it's almost making me upset what people will pay for a 555 timer in a box

>>	Anonymous Sun Aug 17 23:02:19 2014 No.683450 >>683445 >only one wire connected mfw they don't even have to try to con people any more

>>	Anonymous Sun Aug 17 23:22:38 2014 No.683458 File: 65 KB, 552x425, it's a feature.jpg [View same] [iqdb] [saucenao] [google] >>683450 it works like an antenna, so you don't need a ground connected :^)

>>	Anonymous Sun Aug 17 23:38:21 2014 No.683463 >>682249 That's what I was thinking.

>>	Anonymous Sun Aug 17 23:50:58 2014 No.683466 >>683445 I don't have any morals, how can I get into this business?

>>	Anonymous Sun Aug 17 23:58:41 2014 No.683470 >>683466 That makes two of us.

>>	Anonymous Mon Aug 18 01:02:38 2014 No.683491 >>682212 UGHhhhhhh, That soldering job.....

Anonymous Mon Aug 18 02:21:43 2014 No.683525
File: 42 KB, 340x544, TB5-2500.jpg [View same] [iqdb] [saucenao] [google]

>>682569
I know where >>>/biz/ is and its not here.

You won't get anything from us cheaper than the internet. We are handy for people who walk in and walk out with parts but we don't make money selling below cost. Also do electronic repairs and sometimes build custom stuff for people. Have fixed stuff from grandma's torch with 2 D cells to 10kw RF stuff containing a few of pic related.

>>	Anonymous Mon Aug 18 23:12:04 2014 No.683846 >>683466 The big money is in audio cables.

>>	Anonymous Tue Aug 19 00:15:17 2014 No.683864 >>683846 I was actually thinking this. And there's nothing morally wrong about scamming audiophiles.

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