Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

LED Issue

Status
Not open for further replies.
perts

perts

Electrical
Joined
Jun 30, 2004
Messages
39
Location
US
I have a micro and sinks the current to a 3.3 V LED via 220 ohms to turn it on. It works but as soon as I put my scope probe on the LED (micro side) the LED doesnt turn on. What can cause that?
 
Sort by date Sort by votes
IRstuff said:
A schematic at this point would be useful. You're using terminology I recognize in ways I don't.
Click to expand...

How is a schematic going to help with a firmware issue?
25unspf.gif


Keith Cress
kcress -
 
Upvote 0 Downvote
So, you think that a guy that got firmware for turning an LED on wrong actually wired it correctly?

TTFN
faq731-376
7ofakss
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

durablack2
  • Locked
  • Question Question
two proximity sensors, One LED light for system status
Replies
2
Views
2K
IRstuff
IRstuff
SolarTrap
  • Locked
  • Question Question
Battery protection low voltage disconnect issue
Replies
14
Views
973
3DDave
3DDave
Hammer335i
  • Locked
  • Question Question
36V step down to 12V/20A for two pairs of LED’s
Replies
7
Views
2K
eeprom
eeprom
itsmoked
  • Locked
  • Question Question
Soldering issue.
2
Replies
21
Views
1K
IRstuff
IRstuff
RyreInc
  • Locked
  • Question Question
LED circuit clarification
Replies
6
Views
372
itsmoked
itsmoked

Part and Inventory Search

Sponsor

Back
Top