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Post #561
Doing it yourself is part of the fun, and as for paying someone to do it $20-50 per batch is expensive when you just want a prototype.
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Where's the fun in that?
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Why bother with the PCB, rather than just using wire or even soldering the bridge rectifier straight to the top of the capacitor ?
This will be a rough power supply board, I will solder my selfmade bridge rectifier to it and the mega-capacitor, and also mains power.
The bridge rectifier made out of 4 pairs of diodes:
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Jeez can't I have some fun?
Edited:
Also I prefer everything sitting on a board, I'll have more than enough room in my case.
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It seems you're rushing it alot, you could at least make it a through hole design?
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I already said that my drillbits are too big. The smallest I got is 2mil or something like that,
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I'm new in the whole electronics scene and am trying to understand transistors. Would this schematic work? If not could you help me better understand?
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I'd help, but I'm not quite sure what you're trying to accomplish.I'm new in the whole electronics scene and am trying to understand transistors. Would this schematic work? If not could you help me better understand?
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Sorry.
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I assume you're trying to do a basic transistor switch circuit, the problem with your design is that the base-emitter junction is reversed biased so it won't work as you expect (or at all depending on battery voltage).I'm new in the whole electronics scene and am trying to understand transistors. Would this schematic work? If not could you help me better understand?
This is what it should look like.
And when doing a schematic, always put the most positive voltages at the top, not the bottom.
Also place components left to right not the other way.
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thanks
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I wonder if this capacitor is a bit oversized...
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I just managed to send "hallo welt" (Hello world) from my phone to my Arduino using a normal 3.5 audio cable. The first problem was that the voltage was too low for the digital ports, so I couldn't use any preexisting libraries. The second problem was that I couldn't just send high-voltage or low-voltage. It only had voltage spikes when switching between high and low. So I had to define 0 as low and 1 as high-low-high-low-...
The implementation was rather easy, but finding out how to do everything took me nearly a week (of only <1 hour of work each day though
).
Edit: Are those gaybows or optimistics? I'm confused, neither make sense too me. :saddowns:
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I'm posting this so I have motivation to finish it. Its the first two layers of my 4x4 led cube that I am working on. I'm not sure if I want to multiplex and run it entirely from pins or if I want to use my MAX7-somethingCNG chip. What do you think?
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So I built a 5V power supply.
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Shift registerI'm posting this so I have motivation to finish it. Its the first two layers of my 4x4 led cube that I am working on. I'm not sure if I want to multiplex and run it entirely from pins or if I want to use my MAX7-somethingCNG chip. What do you think?
Edited:
Cool!
Now make it smaller, my first psu fitted in 4 rows on a breadboard :)
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Got a Netudino for mah birthday!
Now I've got to find out what to do with it. Any suggestions?
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I think he followed the Adafruit breadboard powersupply tutorial thingy.
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Try FFT.
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Coolio, I just found a triac on an old board!
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I made myself a PWM-fan-controller to replace my broken CPU-Fan.
All it really is, is an astable 555 timer with a diode to bridge the second resistor so I can reach duty cycles below 50% (so from 0% to 100%). Then I fed the output to a MOSFET's gate and thus control the fan. It's incredibly simple, and now I'll neatly solder it onto a board and place in it my pc.
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I found some neat little lightbulbs:
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At first it ran at 10Bit/s and was very stable. Then I rewrote it to be much easier to use (programming wise) and wrote my own software for the phone and it ran at 100Bit/s rather unstable. And today I improved the timing code a lot and it can now do 500Bit/s stable. I love how fast it's getting better. It's so motivating.
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Are there any forums for electronics?
Edited:
It's funny because TI made the first laser guided bomb.
Yes, TI, I am planning on using your MSP430 for a weapon of mass destruction.
Edited:
Oh and yeah, I've decided to get the MSP430.
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I can't listen to the EEVBlog guy for more than three minutes.
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And for the dutch people here, http://circuitsonline.net/forum/
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Well, here is something interesting: http://www.youtube.com/watch?v=ZqufqMQr3rE
Good to see that those software folks at valve are also interested in hardware.
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That POV with a breadboard... yuck!
I liked the first guy, he really was interested in giving his project a finished look.
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Indeed... I was just waiting for LEDs and breadboards to start flying around after he swung the crank.
I also liked the looks of that drum synth. Very slick top panel for the buttons.
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This is a lovely blog for electronics
http://hackaday.com/
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I used to read HaD until they turned fascist. Mind you, I come from '05 era Facepunch, where improper punctuation was a permabannable offense.
The difference here is that the Facepunch community has always said exactly what they thought, and has never been particularly adverse to criticism. Criticism is a necessary thing. I honestly can't support an electronics site that's maintained by art students and encourages the community to sweep issues under the rug instead of participating in open debate.
Edited:
Well I really am a pessimistic asshole today, aren't I? Bashing both EEVBlog and HaD simultaneously. (I'm sorry, I never really gave EEVBlog a chance :( )
I'll try to make up for it by saying that I actually don't hate everything. Jeri Ellsworth's Youtube channel is full of great stuff (ironic, since it's her comment that sent the HaD editors into their self-destructive fit), and there was a while where I was listening to the Soldersmoke podcast pretty regularly (although I'm not a ham, it's still full of great DIY electronics stuff). I also stumble upon a lot of really neat sites on the internet when I'm researching for whatever project I might be working on.
So there is some really good stuff out there, most of it is just a little less mainstream.
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If we had a dedicated electronics forum, we could have like an awesome lesser-known electronics blog megathread where we could post whatever awesome sites we stumble upon.
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There's also Bunnie's blog. He was part of the team who hacked the original XBox back in the day. I don't read the blog often enough, but he's a really smart guy and he posts some neat stuff.
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Bought a MAX232 chip, can't wait for it to arrive in the mail so I can start working with serial communications on my ATTiny2313.
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Well, I got HaD in my RSS feed. 90% of it is uninteresting shit, but the other 10 percent sometimes are worth reading.
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You god it in your RSS feed?
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Except the only people they don't want are the assholes. You can still post criticism as long as you're posting in a manner that's not overly aggressive or rude, and that is exactly what people were doing before the change, being rude to the creators of projects posted on HaD and getting into stupid arguments which would devolve into a shit slinging match.
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Most of the anger was directed at their editorial process. A lot of the editor's summaries are flat-out wrong, and a lot of the projects they choose to put up (at the time) were really inane. You'd see the same sort of backlash if it was a trade journal (which it is, basically, just hobbyist-level), and I don't think the DIY electronics community should settle for anything of lesser quality.
They also weren't open to comments (despite them insisting that they were). You can't say "you don't need x to do that, you could just use y", on HaD, no matter what your intentions, they view it as hostile.
It's a shame, really, they were a good site when they started. Before they hired all these new editors who don't know what the fuck they're doing.
Edited:
I'm also of the opinion that you shouldn't judge people by the words they use. If they have a valid point, you shouldn't shut them up, even if they come across as rude. And if they aren't happy with something, they should be free to express that as well, it isn't healthy not to.
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74HC595 and PC serial port, anyone has idea how to?
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RS-232 doesn't have a clock signal, it would probably be easier to bit-bang it.
Remember to do logic-level conversion.
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Try the parallel port instead.
Agree x 6
Disagree x 1
Funny x 1
Friendly x 1
Optimistic x 3
Artistic x 1
Informative x 2
Dumb x 1
Winner x 1
Zing x 4
