Measuring m43 mcpcb at 4v and emitters dont turn on, help!

6 posts / 0 new
Last post
trailhunter
Offline
Last seen: 4 hours 16 min ago
Joined: 12/23/2015 - 17:56
Posts: 353
Location: VA
Measuring m43 mcpcb at 4v and emitters dont turn on, help!

Hi all, going through a reflow. I tested each emitter on the mcpcb by touching the anode and cathode side, all emitters individually light up but when I touch the leads to the mcpcb, none of them light up. Is there a short in the mcpcb or do I need to up the voltage when testing the mcpcb directly?

bilakos10
bilakos10's picture
Offline
Last seen: 8 hours 53 min ago
Joined: 08/22/2013 - 14:25
Posts: 1317
Location: Thessaloniki, Greece

Measure the resistance between the mcpcb's positive and negative pads. If there's a short, you should be getting a reading.

 

Also, I am speculating that you might have soldered the emitters in reverse polarity. In that case, the emitters should light up after you reverse the leads. 

My daily deals thread: ☢ [Gearbest.com Special Deals]
If you need any coupon code, just leave a reply on the thread.

trailhunter
Offline
Last seen: 4 hours 16 min ago
Joined: 12/23/2015 - 17:56
Posts: 353
Location: VA

Dale helped clarify in another thread. I was only testing the mcpcb at 3v. I bumped up the power to 6.9v and all 12 emitters showed a faint light, just enough to test my reflow. Thanks for circling back so quickly bilakos! Love how people are very active here Smile

bilakos10
bilakos10's picture
Offline
Last seen: 8 hours 53 min ago
Joined: 08/22/2013 - 14:25
Posts: 1317
Location: Thessaloniki, Greece

Ah, I totally missed the fact that the meteor is wired in series Smile

Good for you that you figured everything out!

My daily deals thread: ☢ [Gearbest.com Special Deals]
If you need any coupon code, just leave a reply on the thread.

DB Custom
DB Custom's picture
Offline
Last seen: 17 hours 2 min ago
Joined: 01/13/2013 - 22:28
Posts: 20060
Location: Heart of Texas

Some of us are maybe TOO active, look at my post count…. Facepalm

raccoon city
raccoon city's picture
Online
Last seen: 13 min 52 sec ago
Joined: 10/06/2010 - 02:35
Posts: 12854
Location: रॅकून सिटी Palm Desert CA USA

DB Custom wrote:

Some of us are maybe TOO active, look at my post count…. Facepalm

Congrats on 20,000 posts!  :BEER: