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lab_electrical_engineering:led_brightness_control_using_pwm [2026/06/17 14:28] – mexleadminlab_electrical_engineering:led_brightness_control_using_pwm [2026/06/17 14:29] (current) – mexleadmin
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-  - Build the circuit on the MEXLE-board. To do this, connect two LEDs in anti-parallel. What value must the series resistor for the LEDs have? **An LED requires approx. 20 mA to operate.** \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\  +  - Build the circuit on the MEXLE-board. To do this, connect two LEDs in anti-parallel. What value must the series resistor for the LEDs have? **An LED requires approx. 20 mA to operate.** \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ 
-  - Use the circuit variant with **C1 = 10 nF**. Vary the duty cycle and document the result. \\ \\ \\ \\ \\ \\ \\ \\  +  - Use the circuit variant with **C1 = 10 nF**. Vary the duty cycle and document the result. \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\  
-  - What are the advantages of this type of brightness control? Name some applications. \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ +  - What are the advantages of this type of brightness control? Name some applications. \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ 
   - How would the circuit have to be designed if only one LED is to be operated with brightness control?   - How would the circuit have to be designed if only one LED is to be operated with brightness control?
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