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The figure above shows a simplified circuit of 80- serial-connected LED lamps of which each VT = 2

Electrical Engineering

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The figure above shows a simplified circuit of 80- serial-connected LED lamps of which each VT = 2.7 v and the resistance Ri = 10? in the forward direction. Otherwise, we assume the diode to be ideal. A) Determine R and C so that the current id through the LEDs is limited to flactuate between 8 and 10mA when the circuit is connected to the network voltage. B) Draw id(t) and uc(t). Give the time and top values.