Heater Controls - PCB Polarity ?, Help Please |
Heater Controls - PCB Polarity ?, Help Please |
Nov 10, 2008 - 5:21 PM |
|
Enthusiast Joined Sep 27, '02 From UK Currently Offline Reputation: 1 (100%) |
I've started desoldering the LEDs from the Heater Control PCB.
I have now received my new LEDs. However, they have a + and - wire. The longer of the 2 wires being positive. Problem is...I'm trying to work out the polarity on the PCB. That is, the positive and negative circuits. I also have the same question relating to the window switch. Can anyone help please? |
Nov 10, 2008 - 6:21 PM |
|
Enthusiast Joined Nov 14, '06 From Northampton, UK Currently Offline Reputation: 5 (100%) |
You need to look at the side of the PCB with the silkscreen on. LEDs have a symbol like this:
The triangle points to a vertical bar: >| The vertical bar is the negative side of the LED. Sometimes the two arrows pointing away from the |< are omitted (strictly speaking the latter is the symbol for a diode but sometimes used for LEDs also). This post has been edited by BloodyStupidDavey: Nov 10, 2008 - 6:21 PM -------------------- Davey
Items for sale |
Nov 11, 2008 - 8:18 AM |
|
Enthusiast Joined Sep 27, '02 From UK Currently Offline Reputation: 1 (100%) |
Cheers mate.
QUOTE The triangle points to a vertical bar: >| ...symbol for a diode That's what through me on the window switch. OK for the window switch now. But for the PCB... QUOTE You need to look at the side of the PCB with the silkscreen on....look for symbol... I assume the silkscreen is the green side with the track on. Problem is, I don't seem to be able to see that symbol anywhere. Can you tell I haven't done this before |
Nov 11, 2008 - 11:40 AM |
|
Enthusiast Joined Oct 2, '08 From New Zealand Currently Offline Reputation: 0 (0%) |
Hi 3TST
OK I finished my AC Unit last night and I have some photos that may help. 1st thing is to get a Multi Meter with the diode tested "http://en.wikipedia.org/wiki/Multimeter" Get something like this "http://www.screwfix.com/prods/14469/Electrical/Electricians-Tools/Circuit-Testers/Autoranging-Digital-Multimeter?cm_mmc=GoogleBase-_-Datafeed-_-Electrical-_-Autoranging%20Digital%20Multimeter" only 10 Pound! This tool is your best friend when you work with electricity. In your last Photo (above) it shows the ->|- (diode) symbol so flop your AC board over from the way you have it in the 1st Photo. Sorry if this sounds a bit Preachy but it should help you. Have a look at "http://www.6gc.net/forums/index.php?showtopic=63338" (My Thread) and scroll to the end for a look at how I have done my Car (and AC Unit) WWSideWinder -------------------- WWSideWinder - 1996 - 3S-FE - Auckland New Zealand
~ signature made by jaws4god ~ Have a look at my thread for updates on my progress. "http://www.6gc.net/forums/index.php?showtopic=63338&hl=0" |
Nov 11, 2008 - 5:45 PM |
|
Enthusiast Joined Sep 27, '02 From UK Currently Offline Reputation: 1 (100%) |
Thanks for your help.
LEDs are coming out so much easier QUOTE Have a look at "http://www.6gc.net/forums/index.php?showtopic=63338" (My Thread) Think you'll find that is this thread Still can't work out PCB polarity Sent you a PM based on this pic: This post has been edited by 3TST: Nov 11, 2008 - 5:46 PM |
Nov 11, 2008 - 6:58 PM |
|
Enthusiast Joined Oct 2, '08 From New Zealand Currently Offline Reputation: 0 (0%) |
http://www.6gc.net/forums/index.php?showtopic=63338 is my thread on the updates done to my Curren.
You rAC Board is different to my one. I'll have a look at th eorientation of yours to myne and work it from there. -------------------- WWSideWinder - 1996 - 3S-FE - Auckland New Zealand
~ signature made by jaws4god ~ Have a look at my thread for updates on my progress. "http://www.6gc.net/forums/index.php?showtopic=63338&hl=0" |
Nov 12, 2008 - 5:08 PM |
|
Enthusiast Joined Nov 14, '06 From Northampton, UK Currently Offline Reputation: 5 (100%) |
I assume the silkscreen is the green side with the track on. Silkscreen is the (usually white) writing. Silkscreen actually describes the process of printing the writing: http://en.wikipedia.org/wiki/Silkscreen -------------------- Davey
Items for sale |
Nov 12, 2008 - 7:25 PM |
|
Enthusiast Joined Feb 7, '07 From Portland, Oregon Currently Offline Reputation: 67 (96%) |
I assume the silkscreen is the green side with the track on. Silkscreen is the (usually white) writing. Silkscreen actually describes the process of printing the writing: http://en.wikipedia.org/wiki/Silkscreen So basically, flip the board over to see where the >| symbols are This is gonna come in real handy for me some day! -------------------- |
Nov 12, 2008 - 7:33 PM |
|
Enthusiast Joined Jan 20, '08 From New York Currently Offline Reputation: 1 (100%) |
you could power the board and with a DMM and check for the polarity that way only for a low voltage board or with extreme caution (ex your dryer).
FYI the green lines cover an insulate the "traces" which are the copper lines on the board This post has been edited by brk34: Nov 12, 2008 - 7:34 PM |
Lo-Fi Version | Time is now: January 10th, 2025 - 4:40 PM |