[QUOTE=Chezburger;32396404]Ceramic, sorry for the confusion. Never had any trouble with electrolytes. Bought 'em from some local webshop, quite popular here.
[URL="http://www.dickbest.nl"]http://www.dickbest.nl[/URL] (here ddrl have some link)
[editline]20th September 2011[/editline]
Why the hell would they do that? not like those fake transistors from a while ago, still have some fakes in my inventory. They put a lot of fake ones in things such as radio's, because they made the customers believe that, more transistors = better radio. At least it's easy to notice when your projects are riddled with fakes, RF output power stays on a steady 0.00 Watts[/QUOTE]
Probably just trying to make a bit more profit by selling nasty cheap parts, if it is marked with 10 then it's a 10pF capacitor.
This is precisely the reason I avoid small sellers (with the exception of bitsbox) and stick to the larger companies like RS / Farnell even if it costs more I know I'm getting good quality parts and customer service.
[QUOTE=Chryseus;32396554]Probably just trying to make a bit more profit by selling nasty cheap parts, if it is marked with 10 then it's a 10pF capacitor.
This is precisely the reason I avoid small sellers (with the exception of bitsbox) and stick to the larger companies like RS / Farnell even if it costs more I know I'm getting good quality parts and customer service.[/QUOTE]
Never really took a look at Farnell, will do sometime. Still have my local shop for the real hard to find parts, like the BLY88 FET's. They come at a high price though, remember paying 35 euro's for a BLY87.
Has anyone seen this yet: [url]http://www.wired.com/gadgetlab/2011/09/arduino-arm-products/[/url]
Hey guys, look what I just found, arduino is going to release new products!!!!
[editline]21st September 2011[/editline]
[t]http://i54.tinypic.com/2na1wdy.png[/t]
I love playing with my scope!
[QUOTE=DrLuke;32352404][t]http://i56.tinypic.com/34qmjx1.png[/t]
Whenever I need something, I just take out the whole tray, and take it with me, and then I just put it back again. Also I need to organize it soon, do a major cleanup in my room, as most of the other stuff is just piling up on my pc-table, because I was too lazy to sort it in.[/QUOTE]
That looks perfect for what I need. Did you get that online or in store?
[QUOTE=FoohyAB;32402391]That looks perfect for what I need. Did you get that online or in store?[/QUOTE]
I got that in a local hardware store
I have a weird habbit of de soldering every component on any used electronics I find for free, and storing all of it.
That's how my addiction started. first I was looting everything useful from old PCB's, then I came across some old radio's and bam, hooked on the virus called High Frequent Electronics. But nowadays desoldering from old pcb's is way to unreliable. Only thing I ever used from an old pcb was the fuse. Still intact and shit so I just rampage-soldered it in.
I mostly harvest capacitors and high-power resistors.
[QUOTE=DrLuke;32423692]I mostly harvest capacitors and high-power resistors.[/QUOTE]
what about transformers? must not forget transformers!
[QUOTE=SubbyV-2;32424045]what about transformers? must not forget transformers![/QUOTE]
Or inductors and their ferrite cores.
[QUOTE=ROBO_DONUT;32424102]Or inductors and their ferrite cores.[/QUOTE]
Inductors arent worth much unless you have a inductance meter right?
[QUOTE=SubbyV-2;32424362]Inductors arent worth much unless you have a inductance meter right?[/QUOTE]
Inductors are great, and as for measuring inductance there are a number of methods that can be used.
Well, I seldom get boards with inductors or transformers on them.
I found like 8 BTA 16 triaks on a board , don't know what to do with them
[QUOTE=marcin1337;32424843]I found like 8 BTA 16 triaks on a board , don't know what to do with them[/QUOTE]
Use them as remote on/off switches for various things, all you need is a wireless communication chip, a micro and an opto-isolator.
[QUOTE=SubbyV-2;32424362]Inductors arent worth much unless you have a inductance meter right?[/QUOTE]
You usually don't need a precise value unless you're working with resonant circuits. For something like a a boost/buck converter or power filtering it's often a 'I need a value larger than x' thing.
If you know the diameter and relative permeability of the core (which you can generally look up), the radius of the wire, and approximate number of winds, you can use a formula to get a good idea. I would think that it's something you could guess just by looking at the part with enough experience (since the core/winds are generally visible on larger inductors), but I don't work with inductors enough to have even the vaguest idea myself.
On a related note, I'm thinking about building an inductance meter/frequency counter. I think what I'm going to do is have two 4-bit counters clocked by the frequency input, which will be polled and reset by the MCU periodically. This way the MCU isn't trying to sample a 25MHz signal when it's only executing instructions at 20MHz, the counters effectively mean you only have to poll at 1/256 the frequency of the input signal (although the limits of the counter itself still apply).
I'm still unsure about building the oscillator. I don't want to copy something verbatim without understanding it. All of the DIY LC-meters seem to look similar to [url=http://www.kerrywong.com/2010/10/16/avr-lc-meter-with-frequency-measurement/]this one[/url], which uses some sort of oscillator built around a comparator. I have some idea of how it works (the LC-circuit appears to be some kind of band-pass filter which discards some of the positive feedback), but it's an unusual design I haven't seen before. Is there a name for this sort of circuit?
[QUOTE=DrLuke;32424676]Well, I seldom get boards with inductors or transformers on them.[/QUOTE]
Are you sure? I have a back room full of motherboards, and all of them have inductors on the power circuitry to reject HF noise.
[QUOTE=ROBO_DONUT;32426774]
Are you sure? I have a back room full of motherboards, and all of them have inductors on the power circuitry to reject HF noise.[/QUOTE]
Well, I'm pretty sure there aren't any inductors on the PCBs I got lying around here.
[QUOTE=Chryseus;32425328]Use them as remote on/off switches for various things, all you need is a wireless communication chip, a micro and an opto-isolator.[/QUOTE]
This is dumb but, can I use DC current on them?
[QUOTE=marcin1337;32427319]This is dumb but, can I use DC current on them?[/QUOTE]
Well, unlike transistors, you can only turn them off by applying 0V to the triacs. So basically they only work because AC at some point goes through 0V, thus turning off (when the control pin or whatever it's called is low).
Don't nail me to it though, I haven't ever played with them.
[QUOTE=DrLuke;32427659]Well, unlike transistors, you can only turn them off by applying 0V to the triacs. So basically they only work because AC at some point goes through 0V, thus turning off (when the control pin or whatever it's called is low).
Don't nail me to it though, I haven't ever played with them.[/QUOTE]
IIRC, TRIACs only turn off when there is no voltage present on the gate AND when the anode1-anode2 *current* drops below the holding current for that particular TRIAC.
MY COLLECTION - COMPLETION IS NEAR.
Just arrived package number 8 containing RD15 HVF 15 Watt transistors, some LCD displays, loads of TSA5511 IC's and some other shit.
Oh look what my good mate Sparky drew for me.
It's me getting more (30 year old) HF power transistors in the local shop.
[IMG]http://i.solidfiles.net/8a714.png[/IMG]
Gonna build a 0,1 mhz - 1 ghz frequency counter. Looking forward to the arrival of the pcb.
What's a good all-rounder kit for the Arduino for like $30? I've got LEDs and a PCB and some resistors/capacitors, but that's all.
[t]http://i55.tinypic.com/2rh1m43.png[/t]
This is the circuit board for my tesla coil I'm finally going to etch tomorrow.
Right now I'm eating a lot of ice cream so I have a container for etching tomorrow!
[QUOTE=Protocol7;32460555]What's a good all-rounder kit for the Arduino for like $30? I've got LEDs and a PCB and some resistors/capacitors, but that's all.[/QUOTE]
Since the Arduino alone costs around 30 dollars I don't think you can get a kit for that price.
I'd say the cheapest of kits starts with 50$ and won't contain a lot.
[QUOTE=DrLuke;32461352]I'd say the cheapest of kits starts with 50$ and won't contain a lot.[/QUOTE]
And since you already have LEDs and resistors, which is all a kit really contains, you don't have to get a kit. And don't forget that all the stores charge a shitload extra because it has the name Arduino on it.
Is [url]http://ibiblio.org/kuphaldt/electricCircuits/DC/DC.pdf[/url] a good read to start getting into electronics? And I have basic experience with electronics, what kind of stuff should I get to start getting into electronics? Does it have to be a Arduino? Couldn't find any real info in the OP.
[editline]25th September 2011[/editline]
Also, I have intermediate programming experience.
[QUOTE=Asgard;32471533]Is [url]http://ibiblio.org/kuphaldt/electricCircuits/DC/DC.pdf[/url] a good read to start getting into electronics? And I have basic experience with electronics, what kind of stuff should I get to start getting into electronics? Does it have to be a Arduino? Couldn't find any real info in the OP.[/QUOTE] If you want to get started with real electronics, don't get an Arduino.
Alright, so I'll cross that off my list.
[editline]25th September 2011[/editline]
So, now what? What should I read? What should I buy? How can I really get started?
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