ການຈໍາກັດການຄິດໄລ່ບັນຫາທີ່ຖືກຈໍາກັດໃນປະຈຸບັນ Vin Volt Voltage Drop Across LED Volt Desired LED Current mA No.of LED Connected Series Output of Series LED Resistance Calculation Limiting Resistor Ohms Calculated Resistor Wattage Watts