Putting together a row of LED's that goes from left to right by the use of a Pot. Make sure to provide a diagram ----- to show this 'row of LEDs', the resistors, and the voltage source connection points (and the potentiometer). HermanJFourie: All the diagrams I find has a resistor for every LED. Upload a diagram of one of those circuits - for
Unfortunately as the temperature rises, LED will draw more current at the same voltage - which means even higher temp, higher current, malfunction. This is why high-power LEDs should be always used only with constant-current source and not just series resistors. You can find many LED driver ICs, to which you need only few components.
Factors affecting the resistance life: (1) If the temperature is too high, it can be burned quickly. (2) The acidity and alkalinity of the environment directly corrode the resistance and cause damage. (3) When the external force exceeds a certain limit, the resistance will break. Therefore, to extend the life of the resistor, heat dissipation
Without resistors, the LEDs may draw different currents, leading to inconsistent brightness and color balance. Circuit Overload: Drawing excessive current can overload the power source or other components in the circuit. To properly use an RGB LED, you should include a resistor in series with each color channel.
Assuming you do the right thing and use current limiting resistors for them all then the resistor has to drop 8.6 volts at 16mA. This is a resistor value of about 537 ohms. However, you could wire 3 in series to produce a combined LED voltage of 10.2 volts then use a resistor of 112 ohms. It will be a more efficient way of driving the LEDs .
Common Cathode RGB LED. In a common cathode RGB LED, the cathode of the internal LEDs are all connected to the external cathode lead. To control each color, you need to apply a HIGH signal or VCC to the red, green, and blue leads and connect the anode lead to the negative terminal of the power supply. Common Cathode RGB LED Pinout.
. 340 307 80 52 100 121 101 183 60
do smd leds need resistors
