Problem #1: Build the circuit like in the figure below. The input signal
V_(5)=
20Vppf=1Hz,V_(6)=5V,R_(1)=270\Omega
. Assume that,
V_(GREEN )=2.2V
,
V_(AMBER)=2.4V,V_(RED)=1.7V
for forward biased LED, and
V_(ZENER )=4V
for reverse biased Zener diode. Calculations: Sketch the expected voltage output ( 0.25 pt ), determine numerically expected cutoff voltages ( 0.75 pts ) on the graph.