[QUOTE=DrDevil;45143404]Don't abuse samples, you're hurting everyone who actually depends on them.[/QUOTE]
Not really abusing, IMO - The last time I ordered them from TI was more than 1y ago.
People who order multiple times per month, those are abusing.
[QUOTE=TTSDA;45143528]Not really abusing, IMO - The last time I ordered them from TI was more than 1y ago.
People who order multiple times per month, those are abusing.[/QUOTE]
Are you using the samples to prototype a commercial product or to conduct research? If no, then you're abusing them.
[QUOTE=DrDevil;45143578]Are you using the samples to prototype a commercial product or to conduct research? If no, then you're abusing them.[/QUOTE]
Not really hurting anyone, though.
Ordered a few samples from a company to learn with.
Literally Hitler.
[QUOTE=Tw34k;45144105]Ordered a few samples from a company to learn with.
Literally Hitler.[/QUOTE]
Yes. The company looses money on you, and that directly contributes to the end of sampling programs.
Samples are supposed to be a means of evaluating a component, so that you can buy hundreds of them for your production run later on.
A special case is made for university students, since companies want the students to get familiar with their products. It's kind of like advertising on a higher level.
[QUOTE=DrDevil;45144533]Yes. The company looses money on you, and that directly contributes to the end of sampling programs.
Samples are supposed to be a means of evaluating a component, so that you can buy hundreds of them for your production run later on.
A special case is made for university students, since companies want the students to get familiar with their products. It's kind of like advertising on a higher level.[/QUOTE]
Well i think most of us are uni/college/highschool students, so the above applies to me :3
[QUOTE=scratch (nl);44755084]seeing how we're talking about peltiers, I got mine two days ago
[t]https://dl.dropboxusercontent.com/u/43645231/photos/electro/2014-05-08 17.30.54.jpg[/t]
big ass heatsink does help I assume as this thing cools like a motherfucker. I didn't do the thermal paste so well though as the outer corners aren't covered, and it's hard to get the plate off due to suction forces :v:
[editline]8th May 2014[/editline]
and that's on 9 V. can't wait to try it on 12[/QUOTE]
If you're using it for room cooling: doesn't it heat up the room more than it cools it?
[editline]18th June 2014[/editline]
[QUOTE=DrDevil;45144533]Yes. The company looses money on you, and that directly contributes to the end of sampling programs.
Samples are supposed to be a means of evaluating a component, so that you can buy hundreds of them for your production run later on.
A special case is made for university students, since companies want the students to get familiar with their products. It's kind of like advertising on a higher level.[/QUOTE]
I [B]am[/B] a student though.
Speaking of peltiers, im still selling units:
[url]http://www.ebay.co.uk/itm/331220545432?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649[/url]
[QUOTE=nuttyboffin;45144658]Speaking of peltiers, im still selling units:
[url]http://www.ebay.co.uk/itm/331220545432?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649[/url][/QUOTE]
I would buy one if I didn't go crazy on eBay last week. Those chinese electronics sellers' stuff is so hard to resist.
[QUOTE=TTSDA;45144707]I would buy one if I didn't go crazy on eBay last week. Those chinese electronics sellers' stuff is so hard to resist.[/QUOTE]
Indeed, these ones are all from a product line, were never put in use. however the thermal goop dried up so i took them all appart and i have re-added the thermal goop with a nice fresh layer, the heatsinks are all pressed and machined. REALLY high quality :)
I really want a supercapacitor but I have no way to charge it, argh.
[QUOTE=Leestons;45145559]I really want a supercapacitor but I have no way to charge it, argh.[/QUOTE]
Why? Most Supercaps are at relatively low voltage, so you can use any 12V transformer. Don't forget to put a resistor in series though, or else you'll effectively short the transformer.
[QUOTE=DrDevil;45146079]Why? Most Supercaps are at relatively low voltage, so you can use any 12V transformer. Don't forget to put a resistor in series though, or else you'll effectively short the transformer.[/QUOTE]
Because the cap is 2.5V. I wouldn't have a problem with 5v but I can't afford to buy two capacitors and put them in series.
[QUOTE=Leestons;45146252]Because the cap is 2.5V. I wouldn't have a problem with 5v but I can't afford to buy two capacitors and put them in series.[/QUOTE]
That wouldn't work that well anyway. You'd realistically only be able to charge it to a total of 4.5V without having to wait a couple hours, if not days, not to mention that you would loose a lot of capacity by putting them in series.
[QUOTE=DrDevil;45146303]That wouldn't work that well anyway. You'd realistically only be able to charge it to a total of 4.5V without having to wait a couple hours, if not days, not to mention that you would loose a lot of capacity by putting them in series.[/QUOTE]
You don't loose capacity putting them in series. still the same amount of energy stored.
you loose the capacitance, and that doesn't matter, once you charge it up you could just put them in parallel.
[QUOTE=nuttyboffin;45147198]You don't loose capacity putting them in series. still the same amount of energy stored.
you loose the capacitance, and that doesn't matter, once you charge it up you could just put them in parallel.[/QUOTE]
I just did the math in my head and you're right, the energy doubles by putting 2 equally dimensionsed capacitors in series.
[QUOTE=TTSDA;45144564]If you're using it for room cooling: doesn't it heat up the room more than it cools it?
[editline]18th June 2014[/editline]
I [B]am[/B] a student though.[/QUOTE]
I plan to use it for like a mini fridge, which could hold like what, 1-2 cans of beer? I kinda forgot about the thing, but I realized that I could make a nice model for it using my 3D printer once that is done (with of course space for insulation as it otherwise would cool for shit)
[QUOTE=DrDevil;45146303]That wouldn't work that well anyway. You'd realistically only be able to charge it to a total of 4.5V without having to wait a couple hours, if not days, not to mention that you would loose a lot of capacity by putting them in series.[/QUOTE]
Hours? Afrotechmods charged 5 2600F capacitors in series in like 20 minutes.
also, about the free sample stuff, I'm actually kinda interested in what they could offer. Having new stuff to experiment with as an electronics student without draining your pockets dry could be really interesting and learnfull.
How would I go about asking for a sample kit?
[QUOTE=Leestons;45148505]Hours? Afrotechmods charged 5 2600F capacitors in series in like 20 minutes.[/QUOTE]
It entirely depends on the output impedance of your power supply.
[editline]19th June 2014[/editline]
[QUOTE=scratch (nl);45148546]also, about the free sample stuff, I'm actually kinda interested in what they could offer. Having new stuff to experiment with as an electronics student without draining your pockets dry could be really interesting and learnfull.
How would I go about asking for a sample kit?[/QUOTE]
With most companies, you can only order ICs for sampling.
[QUOTE=DrDevil;45148579]It entirely depends on the output impedance of your power supply.
[editline]19th June 2014[/editline]
With most companies, you can only order ICs for sampling.[/QUOTE]
I don't think any other components would be of any use in sample kits. Stuff like LED's and resistors are so common that one probably wouldn't ask for a sample kit consisting of those for any other reason than it being free.
[QUOTE=scratch (nl);45148661]I don't think any other components would be of any use in sample kits. Stuff like LED's and resistors are so common that one probably wouldn't ask for a sample kit consisting of those for any other reason than it being free.[/QUOTE]
I thought you meant demo/evaluation boards
wow you can pick out of a lot of things at TI it seems. Not gonna do it though at the moment as I got no clue what I could look for and it would make no sense to go "that sounds interesting I'll sample one" without looking into the components first, which would take ages with so many choices.
[QUOTE=scratch (nl);45148546]also, about the free sample stuff, I'm actually kinda interested in what they could offer. Having new stuff to experiment with as an electronics student without draining your pockets dry could be really interesting and learnfull.
How would I go about asking for a sample kit?[/QUOTE]
TI/Maxim/Analog/Microchip offers most of their ICs as samples.
Atmel samples most of theirs too, including relatively expensive AVR chips.
There's a lot more info here: [url]http://www.ladyada.net/wiki/findingparts/sampling[/url].
Most companies will not send to people with free e-mail addresses (@gmail.com, etc), and some will call you/send you an email before sending the stuff. The five I mentioned just send the samples without asking anything.
[QUOTE=DrDevil;45148579]It entirely depends on the output impedance of your power supply.[/QUOTE]
Most power supplies can mange far less than 1 ohm, it only really goes up as the transformer core reaches saturation or current limiting kicks in, indeed most power supplies I've made have an output impedance in the range of 0.02 to 0.005 Ohm with a bipolar output stage.
If you charge a 2.5F cap with a 2.5V supply through a 1 ohm resistor it will take roughly 12.5 seconds to reach full charge, with a peak current of 2.5A.
Postman left me an ENC28J60 ethernet module today.
Great little thing, just got an AVR to work as a web server :v
[T]http://i.imgur.com/XEsThln.jpg?1[/T]
Look at my beautiful SMPS driver for my isolated gate powersupply.
The pins towards the bottom go to the transformer, then there will be other PCBs for the outputs, controlling the gates of each massive IGBT! :)
[img]http://i.imgur.com/DhJ7fnx.png[/img]
[img]http://i.imgur.com/xeCB9Z4.png[/img]
[url]http://www.ebay.ca/itm/301153223869[/url]
I bought one and I have no idea what I'll do with it but hey, it was only $10.
[QUOTE=pentium;45161465][url]http://www.ebay.ca/itm/301153223869[/url]
I bought one and I have no idea what I'll do with it but hey, it was only $10.[/QUOTE]
Remove your alarm clock buzzer and attach it to that instead, apply to the ceiling above your bed.
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