Old 03-20-2008, 03:06 AM #1
Abray's Avatar
Class 2M Laser
 
Join Date: Nov 2007
Posts: 933
Rep Power: 16
Abray is a jewel in the roughAbray is a jewel in the roughAbray is a jewel in the rough
Send a message via AIM to Abray
Abray Abray is offline
Class 2M Laser
Abray's Avatar
 
Join Date: Nov 2007
Posts: 933
Rep Power: 16
Abray is a jewel in the roughAbray is a jewel in the roughAbray is a jewel in the rough
Send a message via AIM to Abray
Default LM317

Question about LM317's

I have recently been having ALOT of trouble with my DIY. I think its the solder, cause everything else has been replaced or tested. However, I am going to replace the LM317 YET AGAIN to make sure thats not the problem. I want to make a completely solderless circuit. But this LM317 says that "it is designed to supply more than 1.5 Amps of load current"

does this mean that I shouldn't get it for my 420mA DIY cause the LM317 should be used with OVER 1.5A? Or could I use it....

I get confused with some electronics lol

http://cgi.ebay.com/10pcs-LM317T-1-5...QQcmdZViewItem

if you go down a little on the page, there is a link for the full specs of the component


__________________
Proud Colorado School of Mines student
Abray is offline   Reply With Quote


















Old 03-20-2008, 03:38 AM #2
Hemlock_Mike's Avatar
Class 4 Laser
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,227
Rep Power: 122333
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Hemlock_Mike Hemlock_Mike is online now
Class 4 Laser
Hemlock_Mike's Avatar
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,227
Rep Power: 122333
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Default Re: LM317

An LM317 is very happy at 200 mA !! I thought it was 1 AMP Maximum. You should be ok with what you are doing if in the 1 amp range. Solderless?? I don't like the sound of that.

Mike
__________________
Don't freeze yourself to cold steel
Hemlock_Mike is online now   Reply With Quote
Old 03-20-2008, 03:49 AM #3
Abray's Avatar
Class 2M Laser
 
Join Date: Nov 2007
Posts: 933
Rep Power: 16
Abray is a jewel in the roughAbray is a jewel in the roughAbray is a jewel in the rough
Send a message via AIM to Abray
Abray Abray is offline
Class 2M Laser
Abray's Avatar
 
Join Date: Nov 2007
Posts: 933
Rep Power: 16
Abray is a jewel in the roughAbray is a jewel in the roughAbray is a jewel in the rough
Send a message via AIM to Abray
Default Re: LM317

well, on a breadboard. I was just saying solderless because I'm trying to confirm that it IS the solder joints that are the problem with my circuit.

but thanks for the help, I've had several people now tell me that LM317's are generally for less than 1 AMP and such
__________________
Proud Colorado School of Mines student
Abray is offline   Reply With Quote
Old 03-20-2008, 04:06 AM #4
MarioMaster's Avatar
Class 3B Laser
 
Join Date: Jul 2007
Location: Allentown, PA
Posts: 3,626
Rep Power: 44935
MarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond repute
Send a message via AIM to MarioMaster
MarioMaster MarioMaster is online now
Class 3B Laser
MarioMaster's Avatar
 
Join Date: Jul 2007
Location: Allentown, PA
Posts: 3,626
Rep Power: 44935
MarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond reputeMarioMaster has a reputation beyond repute
Send a message via AIM to MarioMaster
Default Re: LM317

the LM317 can handle currents of 1.5 amps or even more with a good sized heatsink
__________________
ILT 5500KR krypton only air cooled ion 100mW 647.1nm | ILT 5500AR argon only air cooled ion >300mW multiline
Omnichrome 643 air cooled Ar/Kr ion 10mW 676.4nm 647.1nm 568.2nm 488nm 476.2nm (high hours)
Spectra Physics 127 >30mW 632.8nm HeNe | Uniphase 1.5mW 543.5nm GreeNe
Coherent Innova 90 argon ion water cooled ??W (got plasma, alignment in progress)
Coherent 60W 830nm water cooled diode brick | Shenhui Laser 40W 10600nm water cooled CO2

(9:03:50 PM) Picasso: the best guys i saw ever at burning man was two dudes dressed as all green army men shooting pants at naked guys
MarioMaster is online now   Reply With Quote
Old 03-20-2008, 04:13 AM #5
Hemlock_Mike's Avatar
Class 4 Laser
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,227
Rep Power: 122333
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Hemlock_Mike Hemlock_Mike is online now
Class 4 Laser
Hemlock_Mike's Avatar
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,227
Rep Power: 122333
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Default Re: LM317

The capacity of the LM317 depends on its voltage drop x current. That = watts.
May need heatsink.

Mike
__________________
Don't freeze yourself to cold steel
Hemlock_Mike is online now   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 12:11 AM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC