New Jarduino build gets started - Page 17

ScubaSteve · #**161** 05-03-2013, 12:59 AM

Quote:

Originally Posted by daplatapus

I'm was going to be using the DS18B20. It's got 3 legs on it 1 of which is a ground that goes to the Arduino's ground plane. I though maybe I could share that ground too but by Chris' schematic the fan grounds all go through either a 10K resistor or through a 2N3904 transistor and I wasn't sure if that would work...

Which actually brought me to another question about that 10K resistor. All I have here is a huge 3W10K resistor, will that still work in that fan circuit?

Hey Dom, the DS18B20 should be able to share a ground with the fan circuit but, yes, Chris' fan scheme might present some issues. Then again, that damn schematic he posted is so damn small I can hardly tell what's what - I'm going blind staring at that thing. Can you post a bigger version of it?

daplatapus · #**162** 05-03-2013, 01:38 AM

Lol, ya the original was a bit small. I got my ampehol connectors in and a buddy of mine is a mechanic who works for highways has a crimper so I should be good to go. Although because the pins are removable, I think I can actually solder my wires on.

How's this pic for size:

Chatouille · #**163** 05-03-2013, 02:26 AM

Wow I missed a lot here.... sorry work has been stupid the last 6 weeks.

Looks like you've made some great progress. You can use BC549, that's what I'm using as well. Just remember that the pin orientation (collector, base, emitter) is different on the 2N3904 than the bc549/547.

Chatouille · #**164** 05-03-2013, 02:28 AM

Yeah... that pic was small. I ended up emailing it to Dom shortly after.

daplatapus · #**165** 05-03-2013, 02:40 AM

Hey, there he is!
Ya I did some googling about the differences between them all and found a page there that said the pins were reversed so I hooked them up right, whew.
I'm not finished wiring that all up, but am working on it. Mounting it all on a breadboard.
I'm pretty excited about the amphenol connectors, they look awesome and will work great! Thanks for suggesting them Chris and to Mike and Scubasteve for the input for helping make my decision.

Chatouille · #**166** 05-03-2013, 02:54 AM

Nice to see how everything is coming together! There's still a few things I would like to do to mine, but it's hard to find the time right now.

daplatapus · #**167** 05-03-2013, 01:58 PM

New PCB boards with the integral pull down resistor have been ordered.

KrazyKuch · #**168** 05-03-2013, 05:08 PM

Quote:

Originally Posted by Goatman

Should have used the newer smoke free ones...duh

I didnt see if anyone told what you did wrong here and I know your past that but for future reference for anybody else it looks like those 2 original resistors were in parallel and by putting in a jumper you basically jumpered out your variable resistor....ie you removed the resistance from the circuit, hence the smoke!!!

daplatapus · #**169** 05-04-2013, 04:44 PM

Quote:

Originally Posted by KrazyKuch

I didnt see if anyone told what you did wrong here and I know your past that but for future reference for anybody else it looks like those 2 original resistors were in parallel and by putting in a jumper you basically jumpered out your variable resistor....ie you removed the resistance from the circuit, hence the smoke!!!

Lol, I actually ended up pulling everything off the board and traced everything back to see how that thing was made.
I basically created a dead short like you said. Education is never free

daplatapus · #**170** 05-07-2013, 02:31 PM

2 ends down, 10 to go... them is a lot of wires in one little fitting...ugh