This circuit uses the latest TE555-5 LED FX chip from Talking Electronics. This 8-pin chip and drives 3 LEDs. The circuit can be assembled on matrix board.
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Light Emitting Diode Part IVTHE RESISTOR
The value of the current limiting resistor can be worked out by Ohms Law.
Here are the 3 steps:
1. Add up the voltages of all the LEDs in a string. e.g: 2.1v + 2 ... readmore
Fading LEDs CircuitTwo strips of LEDs fading in a complementary manner9V Battery-operated portable unit Circuit diagramParts:R1,R2 4K7 1/4W ResistorsR3 22K 1/4W ResistorR4 1M 1/4W Resistor (See Notes)R5 2M2 1/4W Carb ... readmore
Light Emitting Diode
CONNECTING A LED
A LED must be connected around the correct way in a circuit and it must have a resistor to limit the current.
The LED in the first diagram does not illuminate because ... readmore
AC Powered LED SchematicAC Powered LED Schematic ... readmore
LEDsLight Emitting Diodes (LEDs)
Example: Circuit symbol:
FunctionLEDs emit light when an electric current passes through them.
Connecting and soldering LEDs must be connected the correct way ... readmore
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