schematic vs breadboard

Your chip is in backwards! Pin 1 should be the pin with the dot next to it. Also, your 0.1uF capacitor is shorted by the strip in the board.

Haven't really checked for other problems, they were the two obvious things.

Dave :)

Surely you can do that yourself ?

What are you expecting the circuit to DO ?

Why do you think you have a problem ?

Graham

Brilliant.

It would have helped it he'd used a more conventional colour coding !

Typical googler.

Graahm

Thanks!

What exactly do you mean by "shorted by the strip in the board"?

David L. J> elesser wrote:

It means the 2 'holes' you have it plugged into are internally connected in the 'breadboard'.

Maybe you think the connections run the other way ? They don't ( except for the power connections on the outer part ).

Graham

Having the "right" colour wires would have still produced the same result...

I'm offended! :->

The OP would not be the first beginner to get an IC in backwards. Heck, after 25 years I still do it occasionally when my brain isn't on the job! Not much fun unless it smokes though, but still an essential part of the beginner learning curve. You don't learn much when your circuit works first go!

Dave :)

Exactly as Graham said, but a picture tells a thousand words:

Depending on the breadboard model, the horizontal power strips can be split in half and not run all the way along, a trap for young players.

Dave :)

It might have made the mistake more obvious though !

Graham

Ok, thanks a lot Dave, I corrected these two mistakes, and it seems to work now... The only problem is that I don't have an AC source to test it with (I thought of a mic, but I wouldn't know how to connect it to a breadboard...)

Btw, I'm a student Electronics and Computer Engineering (in the second year), and we only worked with breadboards for about a month in the first year, and all the rest is FPGA's and microcontrollers, etc.. So that's the reason I'm not so good at wiring breadboards...

Anyway, thanks a lot!!!!

David L. J> Eeyore wrote:

How do you make microcontrollers work then ?

Graham

and please stop top-posting btw.

Schools usually have "trainer" systems with everything (sadly) pre-connected. Just compile your code, download, and the LED flashes or the LCD lights up. Means everything works first go and the teacher doesn't have to waste time actually teaching anything :->

Dave :)

A little off topic: Why not use top posting? Bottom posts require that I page through stuff I have likely already read. If the response is at the top, I only need to read that. If I don't recall the original it is there as a footnote.

Do you have a reader that automatically sends you to the new material?

I admit to follow>and please stop top-posting btw.

John Ferrell W8CCW

I hate those plastic breadboard things. I prefer to solder parts live-bug style on an old hunk of copperclad. It's a lot easier to understand, and you can add "comments" with a marker pen and keep it for future reference.

If you're serious about electronics, you should set up a personal mini-lab: scope, DVM, function generator, soldering iron, power supply, a small stock of parts. The things you hear in class tend to just whizz by and be forgotten, but if you actually make working circuits, the theory becomes real and sticks.

"Electronics" education is less and less about electronics, mostly because all that computer and digital stuff is so cheap to teach.

John

You might install those newgangled things on your screen, "scroll bars" I think they're called.

The main reason to not top-post is because most everyone on usenet trims and bottom-posts, and think it rude if you don't. Consider it an issue of manners.

John

It's been my experience that most people don't trim, yet still bottom post, which is very inconsiderate, since then you have to scroll (usually past lots of repeat and multi-quoted text) to get to the new text.

Also, most people interleave, not bottom-post. If everyone learned to trim down to the minimum, and interleave post, I'd be happier.

Usenet news servers used to enforce the rule that you had to have more new text than old, but that's long gone.

Me, I trim heavily and interleave my replies most of the time, but top post when the text I'm quoting is more of a footnote than something I'm replying to.

Looks to me that the ic is in right. pin 1 is lower left and 8 is top left and connected to positive. The .1 cap is in line with the pin1 instead of pin 5 where it should be, and is indeed shorted by the breadboard connector.

Stick your finger on the input. That'll couple a little 60 cycle AC in.

And tragic for the blind usenet users who have to listen through all of the other crap over and over and over again.

If I have to scroll down as often as not I'll skip the message.

John Ferrell wrote in news: snipped-for-privacy@4ax.com:

No, but close. Whem I'm reading posts with lots of quotes I can hit [shift]+[space] to jump down to the first bit of unquoted text. This works only when others use properly quoting newsreaders (where quotes are greater than signs at the start of the line.)

I'm using Xnews as my newsreader.

Puckdropper