Duo Leds 0 3/16in Bi-Color Yellow Red Clear Changing Light Loks 20 Piece S667

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20 pieces DUO Bi-Color LEDs 5mm yellow / red clear
We offer you a very rare LED type with two colors in a standard 5mm housing.
Depending on the polarity, it lights up red or yellow (color change due to polarity reversal).
Ideally suited, for example, for lighting that changes in the direction of travel on locomotives and railcars, push-pull trains and much more. for analog DC railways
Technical specifications:
Design - 5mm
Luminous color - red and yellow
Voltage - red = 2.00V DC and yellow 2.00V DC
Current - per color max. 20mA
Beam angle - approx. 30 °
Luminosity - ka
Housing color - clear
Connection type - 2-pole (bipolar - color change by reversing polarity)
The connection diagram 1 shows the connection of 4 LEDs with only 2 resistors. The small disadvantage with this simple circuit is the use of only one resistor for both colors. The value of the resistance determines the light intensity. It is therefore not possible to adjust the brightness of the two colors individually.
Connection scheme 2 is a little more complex. The advantage here is the use of 1N4148 diodes. Now you can insert 4 resistors and thus set the brightness of each individual luminous color separately.
The values ​​of the resistors are based on the maximum driving current and also on your individual preferences for brightness.
If you decide on connection diagram 1, you will need with a driving voltage of, for example, max .:
10V - 470 ohms
12V - 560 ohms
14V - 680 ohms
If you decide on connection diagram 2, you will need with a driving voltage of, for example, max .:
10V - 470 Ohm for red and 470 Ohm for e.g. yellow
12V - 560 Ohm for red and 560 Ohm for e.g. yellow
14V - 680 Ohm for red and 680 Ohm for e.g. yellow
The specified resistance values ​​are the minimum values. If you want to reduce the luminosity, then simply use resistors with higher values.
Enjoy your shopping!!
Important note on the purchase process when purchasing multiple items
When purchasing multiple items, please make sure that you only visit the eBay checkout "pay now" after you have bought all the items. This is the only way to combine your order into one order. So that the shipping costs are only calculated once by eBay, you have to go through the purchase process!
Please inquire the international shipping costs for multiple purchases before you pay!
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The connection diagram 1 shows the connection of 4 LEDs with only 2 resistors. The small disadvantage with this simple circuit is the use of only one resistor for both colors. The value of the resistance determines the light intensity. It is therefore not possible to adjust the brightness of the two colors individually. Connection scheme 2 is a little more complex. The advantage here is the use of 1N4148 diodes. Now you can insert 4 resistors and thus set the brightness of each individual luminous color separately. When purchasing multiple items, please make sure that you only visit the eBay checkout "pay now" after you have bought all the items. This is the only way to combine your order into one order. So that the shipping costs are only calculated once by eBay, you have to go through th