Author Topic: AVR-Transistor Tester (Read 43211 times)

FOOKz™ · « **Reply #30 on:** March 03, 2011, 02:26:38 PM »

I guess i will take 2 DIP ones... thought about it today and i could just turn a DIP into SOIC by bending the leads and belt sanding the silicon package smaller.

Quote from: hyper999 on March 03, 2011, 10:30:48 AM

also how would i check capacitors?

resistance across a capacitor is always supposed to be infinite ohms if its discharged... basically open an condition.

Measure supply terminals. you should not get a resistance thats scary low; say under 20 ohms... would be bad. measure supply terminals, you should read some sort of resistance.

hyper999 · « **Reply #31 on:** March 03, 2011, 02:48:38 PM »

Quote from: hyper999 on March 03, 2011, 10:30:48 AM

ok i can get them smd ones (although they are twice the price of the same but through hole)

turns out they aren't I just have an awful memory... so its up to you smd or through hole.

though are you sure you could sand them? wouldnt that get really hot?

FOOKz™ · « **Reply #32 on:** March 03, 2011, 03:58:03 PM »

i sand DIP package chips all the time to fit them in controllers. no they dont get hot if you do a bit at a time.

get the SMD ones please if they are less than or equal to the through hole chip price. surface mount PCBs are easier to build in my opinion plus they are smaller and you'll be able to fit them in anything.

If you can program the surface mount chip that would also be a plus.

However, if you do not feel comfortable programming a surface mount chip get some regular ones if that makes it easier for you. [This is mainly why i want you to get them so you could program them for me ]

FOOKz™ · « **Reply #33 on:** March 24, 2011, 04:58:21 PM »

hyper what version did you program the AVRs you sent me? I have to know so i can grab the proper schematic diagram. Gonna test it tonight and finish up the PCB next weekend.

hyper999 · « **Reply #34 on:** March 25, 2011, 08:58:46 AM »

its the latest version, i'm pretty sure they all use the same code so any of the schematics posted in this thread will work

frenulem - No.5417 · « **Reply #35 on:** June 05, 2011, 05:24:29 PM »

I'm gonna get back on this soon, very very soon, I got 4 hours of maths exams this week tho

FOOKz™ · « **Reply #36 on:** June 05, 2011, 10:35:52 PM »

same*

I failed a class and im retaking it, ITS SO GAY!!! I hate busy work stuff.

Still have the PCB to work on... if theres someone who wants to build a case for it that would be kool.

hyper999 · « **Reply #37 on:** June 06, 2011, 07:46:24 AM »

I think i might have another crack at a PCB for this, because i've had a lot more practice at making them and i've stumbled upon some nice free PCB software called Fritzing that allows you to build your circuit on a virtual breadboard and then translate this into a PCB (including auto-routing

) and i'm dying to get this thing off my breadboard!

Anonamous · « **Reply #38 on:** June 11, 2011, 07:47:06 AM »

hey, just wondering how this is coming along. I would like to be making one of these as I can see how damn useful it would be. Im just gonna wait untill there is a solid parts list and code and everything. I just dont want to go through whta I did trying to get my usb/spi NAND flasher working (which I eventually did btw

)

frenulem - No.5417 · « **Reply #39 on:** June 11, 2011, 10:13:36 AM »

Gonna work on his tonight, I would try and buy a pre programmed from you hyper but my pay pal is bein a dirty hoe

hyper999 · « **Reply #40 on:** June 11, 2011, 10:56:51 AM »

lol well i got as far as rebuilding this on my breadboard, and as i did i also built it on fritzing but i had trouble getting a decent PCB layout worked out without a trillion jumpers...

If someone else does a PCB design i will happily test it out

Anonamous · « **Reply #41 on:** June 11, 2011, 11:11:48 AM »

Is there anywhere where I can get all of these at the same place?

ATMEGA8-P
LM7805
HD44780

hyper999 · « **Reply #42 on:** July 13, 2011, 11:37:28 AM »

determined to get this finished by the weekend :@

Sneak peek...

hyper999 · « **Reply #43 on:** July 16, 2011, 03:00:23 PM »

FINISHED!!!!!!

Isn't she beautiful? :P

Rodent · « **Reply #44 on:** July 16, 2011, 05:03:45 PM »

Very Nicely done Hyper you do some really nice and clean work

hyper999 · « **Reply #45 on:** July 16, 2011, 05:06:16 PM »

Quote from: Rodent on July 16, 2011, 05:03:45 PM

Very Nicely done Hyper you do some really nice and clean work

Thank you, if a jobs worth doing, its worth doing right. :P

Anonamous · « **Reply #46 on:** July 16, 2011, 05:12:04 PM »

Quote from: hyper999 on July 16, 2011, 05:06:16 PM

Thank you, if a jobs worth doing, its worth doing right. :P

That is definatly true lol.

I would never use the board your using because of how the traces are... it would confuse the hell out of me lol.

Rodent · « **Reply #47 on:** July 16, 2011, 05:13:22 PM »

Quote from: hyper999 on July 16, 2011, 05:06:16 PM

Thank you, if a jobs worth doing, its worth doing right. :P

Your welcome and doing it right is the only way to do things doing them right the first time around.

hyper999 · « **Reply #48 on:** July 16, 2011, 05:29:14 PM »

Quote from: Anonamous on July 16, 2011, 05:12:04 PM

That is definatly true lol.

I would never use the board your using because of how the traces are... it would confuse the hell out of me lol.

Did you see the pdf i made about the battery powered charger? i'm going to make one like that for this, so you print the layout out stick it to the board then you know exactly where everything goes

makes it super easy

frenulem - No.5417 · « **Reply #49 on:** July 16, 2011, 05:49:38 PM »

ZOMG cannot wait, may need to get the chip off you tho hyper, sometime in the future

Anonamous · « **Reply #50 on:** July 16, 2011, 06:43:31 PM »

Quote from: hyper999 on July 16, 2011, 05:29:14 PM

Did you see the pdf i made about the battery powered charger? i'm going to make one like that for this, so you print the layout out stick it to the board then you know exactly where everything goes makes it super easy

did not think of that... lol

anyway in that pdf where it shows the board, all the traces going horizontal are connected except where the red circles r right.

Also, your tester looks great, I cant wait to get my avr and lcd screen so i can make it lol.

hyper999 · « **Reply #51 on:** July 17, 2011, 04:06:09 AM »

Quote from: Anonamous on July 16, 2011, 06:43:31 PM

did not think of that... lol

anyway in that pdf where it shows the board, all the traces going horizontal are connected except where the red circles r right.

Also, your tester looks great, I cant wait to get my avr and lcd screen so i can make it lol.

Yep you get the board with all the horizontal traces intact then you "break" the traces where the red squares are

Anonamous · « **Reply #52 on:** July 17, 2011, 08:51:16 AM »

Quote from: hyper999 on July 17, 2011, 04:06:09 AM

Yep you get the board with all the horizontal traces intact then you "break" the traces where the red squares are

Oh ok good then I was correct lol. I don't have any boards set up like that, radio shack doesn't seem to carry them, so this is what I did.

http://i93.photobucket.com/albums/l70/matand009/0717111134.jpg

hyper999 · « **Reply #53 on:** July 17, 2011, 09:57:12 AM »

Quote from: Anonamous on July 17, 2011, 08:51:16 AM

Oh ok good then I was correct lol. I don't have any boards set up like that, radio shack doesn't seem to carry them, so this is what I did.

http://i93.photobucket.com/albums/l70/matand009/0717111134.jpg

Thats odd...

and what is that in the picture?

Anonamous · « **Reply #54 on:** July 17, 2011, 10:06:50 AM »

Quote from: hyper999 on July 17, 2011, 09:57:12 AM

Thats odd...

and what is that in the picture?

the bottom of the board I made of the usb charger you posted... this is getting a bit off topic now lol.

hyper999 · « **Reply #55 on:** July 17, 2011, 10:13:52 AM »

you should post some pics of it in the thread

Anonamous · « **Reply #56 on:** August 01, 2011, 06:55:23 AM »

Quote from: hyper999 on January 28, 2011, 10:37:55 AM

built it, seems to work, but im gonna need to edit the code as the on screen messages are in german now i just need the pcb layout

EDIT: it seems to be detecting all resistors as paralell opposite diodes, this could be due to my wiring or because the youtube video above has different software on the AVR (mines in german theres is english), or because i had to bodge some resistors, i dont know

EDIT2: Just found some updated designs and software here, http://svn.coremelt.net/avr/semiconductor_tester/

EDIT3: Ok sorted now, english, resistors working, caps working, transistors working, diodes working, uart output now included and working. cant test accuracy until i get the right resistors though. also the uart means you can use a cheap serial>usb cable instead of or as well as an lcd

there is also updated schematics including one that sacrifices the auto turn off but reduces the part count a bit

also fookz if its not too much trouble could you add to the pcb a connection for uart (pin 26 for tx and gnd) and a 6pin isp header? or gimme the files so i can try add these myself?

cheap serial>usb cable... how do I do that? lol I can do a full test then without the lcd screen after I get back from dropping off my car to get it painted. I only need to connect a few resistors and put in the test socket and the board part is done.

I got everything together now (except for the display) and I believe that it is working because when I put an led in and press the button, it does blink like in the video.

hyper999 · « **Reply #57 on:** August 01, 2011, 10:47:38 AM »

Quote from: Anonamous on August 01, 2011, 06:55:23 AM

cheap serial>usb cable... how do I do that? lol I can do a full test then without the lcd screen after I get back from dropping off my car to get it painted. I only need to connect a few resistors and put in the test socket and the board part is done.

I got everything together now (except for the display) and I believe that it is working because when I put an led in and press the button, it does blink like in the video.

I dunno I never managed to get the serial out to work properly

Anonamous · « **Reply #58 on:** August 01, 2011, 12:46:21 PM »

Quote from: hyper999 on August 01, 2011, 10:47:38 AM

I dunno I never managed to get the serial out to work properly

i believe in one of our posts you said something about having to connect pin 26 to all? what does that mean lol

hyper999 · « **Reply #59 on:** August 01, 2011, 06:18:06 PM »

The latest software is meant to have uart out but when i hooked it up all i got was random symbols

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Author Topic: AVR-Transistor Tester (Read 43211 times)