Lucid Electronics Workbench, calculate the value of a load resistor for a Light-Emitting Diode (LED) based on supply voltage and LED characteristics. This program contains a number of standard LED products to choose from. After the value of the load resistor is calculated, a table of standard resistor values can be displayed so that the closest resistor value may be selected for the intended program. Select from a variety of Power Supply types and enter the transformer voltage and power supply load. This program will calculate the values for diodes, capacitors, output voltage and load current.