(c) The diagram of FIGURE 2 shows a bi-directional opto coupler input interface circuit. When a supply voltage of 20 V is applied the LED
carries a current and 2 V is dropped across it. Calculate the value of the LED current and the value of current through the 3 k? resistance.
Please refer to the attachment.© BrainMass Inc. brainmass.com October 25, 2018, 7:12 am ad1c9bdddf
The solution contains the complete steps to arrive at the answer.