Heater control panel led's
Discussion
From www.thegriffithpages.com/alternative-parts-list.html
Maplin and RS components
Small round (3mm) Cylindrical ones with a flat top are made by Kingbright, stock nos; L424HDT Red, L424GDT Green.
Maplin order codes; YH72 red, YH73 green.
RS stock numbers; 247-1139 red,229-2497 Green.
Triangular ones are also made by Kingbright, stock number L-323GD (Green) and L-323YD (Yellow).
Maplin supposedly stock the green ones as YY55k, but not the yellow ones.
Found these people selling all sorts of LED's but havnt had the time to see if they sell the right 1's www.eleinmec.com/shop_category.asp?126
Tim
Maplin and RS components
Small round (3mm) Cylindrical ones with a flat top are made by Kingbright, stock nos; L424HDT Red, L424GDT Green.
Maplin order codes; YH72 red, YH73 green.
RS stock numbers; 247-1139 red,229-2497 Green.
Triangular ones are also made by Kingbright, stock number L-323GD (Green) and L-323YD (Yellow).
Maplin supposedly stock the green ones as YY55k, but not the yellow ones.
Found these people selling all sorts of LED's but havnt had the time to see if they sell the right 1's www.eleinmec.com/shop_category.asp?126
Tim
Sorry to hijack the thread but my Griff has 6 LEDs on top of the steering column shroud. 3 that flash when indicating right and 3 for when indicating left. They are really visible and help make sure that I cancel the indicators after a turn... would like to put the same on my W3dge
- how does one wire up an LED - is it as simple as earth to one leg and live from indicator to the other ? 
- how does one wire up an LED - is it as simple as earth to one leg and live from indicator to the other ? 
To wire up an LED, you need to connect the cathode (usually the shorter leg) to earth, and the anode to the power supply with a serial resistor. You'll know if it's the wrong way round cos it won't light up (just spin it round). eg
Earth--------(short leg)Diode(long leg)-----resistor R------ +12.8V
The value of the resistor is R = (12.8 - Vf) / Imax where Vf is the diode's voltage drop and Imax is the the maximum forward current for the diode. Typical values are Vf=2.5V and I=20ma which gives
R = (12.8 - 2.5) / 0.02 = 500ohms approx. (go for the nearest value above this you can get)
If you make R bigger (eg 1000ohms) you won't blind yourself with a powerful led. Substitute your own values into the above formula...
Earth--------(short leg)Diode(long leg)-----resistor R------ +12.8V
The value of the resistor is R = (12.8 - Vf) / Imax where Vf is the diode's voltage drop and Imax is the the maximum forward current for the diode. Typical values are Vf=2.5V and I=20ma which gives
R = (12.8 - 2.5) / 0.02 = 500ohms approx. (go for the nearest value above this you can get)
If you make R bigger (eg 1000ohms) you won't blind yourself with a powerful led. Substitute your own values into the above formula...
Middle Laner said:
To wire up an LED, you need to connect the cathode (usually the shorter leg) to earth, and the anode to the power supply with a serial resistor. You'll know if it's the wrong way round cos it won't light up (just spin it round). eg
Earth--------(short leg)Diode(long leg)-----resistor R------ +12.8V
The value of the resistor is R = (12.8 - Vf) / Imax where Vf is the diode's voltage drop and Imax is the the maximum forward current for the diode. Typical values are Vf=2.5V and I=20ma which gives
R = (12.8 - 2.5) / 0.02 = 500ohms approx. (go for the nearest value above this you can get)
If you make R bigger (eg 1000ohms) you won't blind yourself with a powerful led. Substitute your own values into the above formula...
Earth--------(short leg)Diode(long leg)-----resistor R------ +12.8V
The value of the resistor is R = (12.8 - Vf) / Imax where Vf is the diode's voltage drop and Imax is the the maximum forward current for the diode. Typical values are Vf=2.5V and I=20ma which gives
R = (12.8 - 2.5) / 0.02 = 500ohms approx. (go for the nearest value above this you can get)
If you make R bigger (eg 1000ohms) you won't blind yourself with a powerful led. Substitute your own values into the above formula...
wish I'd paid attention at school now
better get backk on the Maplins site and look for some resistors then...
Edited by paulg390 on Thursday 5th April 16:58
eliot said:
roy e6 said:
does any body know who is selling the led's especially the triangular ones and the tri colour one for the ice detector??? Many thanks in advance for any replies.
Led's a very reliable - are you they are faulty?
What? I took the dash out to be revaneered, that is why i had to replace some. Job now done and looking good.
Edited by roy e6 on Saturday 7th April 18:49
roy e6 said:
eliot said:
roy e6 said:
does any body know who is selling the led's especially the triangular ones and the tri colour one for the ice detector??? Many thanks in advance for any replies.
Led's a very reliable - are you they are faulty?
What? I took the dash out to be revaneered, that is why i had to replace some. Job now done and looking good.
Edited by roy e6 on Saturday 7th April 18:49
Roy, assume they arrived ok? Did they fit ok or need filing down a little? Only ever done them on Leven dashes and they are always too tight.
groomvroom said:
roy e6 said:
eliot said:
roy e6 said:
does any body know who is selling the led's especially the triangular ones and the tri colour one for the ice detector??? Many thanks in advance for any replies.
Led's a very reliable - are you they are faulty?
What? I took the dash out to be revaneered, that is why i had to replace some. Job now done and looking good.
Edited by roy e6 on Saturday 7th April 18:49
Roy, assume they arrived ok? Did they fit ok or need filing down a little? Only ever done them on Leven dashes and they are always too tight.
They arrived the next day.Top bloke thanks again. They needed a litle filing but i think that was due to a litle excess lacquer in the holes. Looks the muts nuts now. London Carriage Craft have done a very very good job.
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