Electrical Engineering V2 - Developers

[QUOTE=scratch (nl);44361628]I forgot to make a video, but here's a pic of the final [del]clusterfuck[/del] breadboard prototype. At the moment I'm working on a prototype board, which is almost done as well. [t]https://dl.dropboxusercontent.com/u/43645231/photos/electro/crane.png[/t] the 3 rotary encoders are to prevent the crane from driving past it's limits. As far as I know the programming side of things is all done now.[/QUOTE] If you think that is bad, try build a TL494 circuit with those jumpers.

[QUOTE=Chryseus;44360065]-TI title image- Have some reading material. [url]http://www.ti.com/ww/en/analog/Amplifiers-eBook/[/url][/QUOTE] I really don't know what it is with electronics companies and puns. Had to raise an eyebrow when I saw this in my inbox from Freescale Semiconductor. [IMG]http://i.imgur.com/TIkdzAb.png[/IMG] [sp]It was a sales announcement with the opening line- "When it's going "cheap, cheap!""[/sp]

[IMG]http://3devs.bplaced.net/wp-content/uploads/2014/03/2-pin2.jpg[/IMG] Any idea how this connection is called ? its the same on both sides. I can not search for it because i dont know the name...

I think it's a JST connector

[QUOTE=Pappschachtel;44372674][IMG]http://3devs.bplaced.net/wp-content/uploads/2014/03/2-pin2.jpg[/IMG] Any idea how this connection is called ? its the same on both sides. I can not search for it because i dont know the name...[/QUOTE] Japanese Solderless Terminal JST The partner of this one i think is: [url]http://uk.farnell.com/jst-japan-solderless-terminals/xhp-2/connector-housing-2way/dp/1516264?MER=en-me-pd-r2-acce-con[/url] Might be wrong. i will be able to find it if i get a closer picture of it and pin pitch measurement

[IMG]http://3devs.bplaced.net/wp-content/uploads/2014/03/closeup.jpg[/IMG] seems to the one you told to be :) much thx!

[QUOTE=Pappschachtel;44373938][IMG]http://3devs.bplaced.net/wp-content/uploads/2014/03/closeup.jpg[/IMG] seems to the one you told to be :) much thx![/QUOTE] Hehe, good, i would try using a micrometer to measure the pitch ;)

Worth noting is that JST comes in a slew of different types and pin-pitches.

[QUOTE=chipset;44375327]Worth noting is that JST comes in a slew of different types and pin-pitches.[/QUOTE] Hence my asking for a close up look at it, i think i found a matching one. Don't know why someone dissgreed with my last post... measuring the pin pitch properly is rather important actually.

Seems to be 2.54mm/0.1in pitch

looks like a 2.5 mm pitch [IMG]http://www.hansenhobbies.com/products/connectors/250mm_X57/250mm_X57_1x2/imgfolder_a/img1_big.jpg[/IMG] might be this one that should fit :) anyways, thx very much, it would be hard to search for something you don't even know the name of ....

[IMG]http://forum.allaboutcircuits.com/cache.php?url=http://diyaudioprojects.com/Technical/Voltage-Regulator/LM317-Current-Regulator.png[/IMG] Could somebody please be utterly amazing and recreate this on a breadboard? I'm clearly not doing it right because it's not working and a photo would help loads. The input side wouldn't be needed as I've done that right and the load can just be an LED. You don't even need to use a LM317, anything with the same package would be fine. Thanks.

[QUOTE=Leestons;44376042][IMG]http://forum.allaboutcircuits.com/cache.php?url=http://diyaudioprojects.com/Technical/Voltage-Regulator/LM317-Current-Regulator.png[/IMG] Could somebody please be utterly amazing and recreate this on a breadboard? I'm clearly not doing it right because it's not working and a photo would help loads. The input side wouldn't be needed as I've done that right and the load can just be an LED. You don't even need to use a LM317, anything with the same package would be fine. Thanks.[/QUOTE] Why don't you just post a picture of your circuit instead

[QUOTE=Leestons;44376042][IMG]http://forum.allaboutcircuits.com/cache.php?url=http://diyaudioprojects.com/Technical/Voltage-Regulator/LM317-Current-Regulator.png[/IMG] Could somebody please be utterly amazing and recreate this on a breadboard? I'm clearly not doing it right because it's not working and a photo would help loads. The input side wouldn't be needed as I've done that right and the load can just be an LED. You don't even need to use a LM317, anything with the same package would be fine. Thanks.[/QUOTE] What size resistor did you use ?

What I'm struggling with is R1, isn't ADJ and Vout basically just connected with a resistor?

[QUOTE=Leestons;44376042][IMG]http://forum.allaboutcircuits.com/cache.php?url=http://diyaudioprojects.com/Technical/Voltage-Regulator/LM317-Current-Regulator.png[/IMG] Could somebody please be utterly amazing and recreate this on a breadboard? I'm clearly not doing it right because it's not working and a photo would help loads. The input side wouldn't be needed as I've done that right and the load can just be an LED. You don't even need to use a LM317, anything with the same package would be fine. Thanks.[/QUOTE] Here, i drew this up for you: [img]http://i.imgur.com/bmocwsS.png[/img] I am far too kind.. and amazing :P

[QUOTE=Leestons;44376286]What I'm struggling with is R1, isn't ADJ and Vout basically just connected with a resistor?[/QUOTE] Yes, but due to Ohm's law you have a voltage drop over the resistor, as there's a current flowing through it. You want that voltage to be 1.25V, as the regulator will try it's best to keep this voltage difference between Vout and ADJ.

I think I see where I'm going wrong. I'll give it a go tomorrow. Thanks guys.

I'm going to major in EE when I go to uni this fall. I've been quite interested in this subject, and I want to learn and experience more because I love circuits and making things and I LOVE learning how stuff works (and so I am ahead of the class when school comes, hehe) Can anyone give me some tips, or preferably a simple task to do with given materials? I just want to learn about stuff.

It works! Many thanks to those who helped. Now I just need to get myself a rheostat because potentiometers can't handle much current.

[QUOTE=Leestons;44382818]It works! Many thanks to those who helped. Now I just need to get myself a rheostat because potentiometers can't handle much current.[/QUOTE] Try using an Opamp and a potentiometer to feedback.

Thanks. Never used an opamp before so I'll be spending the afternoon learning about them.

[QUOTE=NixNax123;44382394]I'm going to major in EE when I go to uni this fall. I've been quite interested in this subject, and I want to learn and experience more because I love circuits and making things and I LOVE learning how stuff works (and so I am ahead of the class when school comes, hehe) Can anyone give me some tips, or preferably a simple task to do with given materials? I just want to learn about stuff.[/QUOTE] Depends on how deep you want to dive in. Try googling for "beginner circuits" or "fun weekend electronics projects".

tomorrow Arduino will be 10 years old!

And some store is having a sale! You can get Pro minis for $3, or unos for $18

[QUOTE=Gulen;44383694]And some store is having a sale! You can get Pro minis for $3, or unos for $18[/QUOTE] Where :O

SparkFun.

[QUOTE=Gulen;44384050]SparkFun.[/QUOTE] And then you realize you are paying 30 euros to get it shipped (excluding import fees).

[QUOTE=Gulen;44383694]And some store is having a sale! You can get Pro minis for $3, or unos for $18[/QUOTE] The UNO R3 clone (indistinguishable apart from the text on the back silkscreen) is on sale for $13.99 on dx.com at the moment, or you can get the SMD version for $12.45. Free shipping too, albeit slow.

[url]http://www.ebay.com/itm/141043540165?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649[/url] [url]http://www.ebay.com/itm/130839929399?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649[/url] I keep a handful of each of these in one of my bins and even a few at work. At this price they're almost disposable.