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A Simple Zener Diode Voltage Regulator The Zener diode has a region in its reverse characteristics of almost constant voltage regardless of the current through the diode. This can be used to regulate or stabilize a voltage source against supply or load variations. . A Zener diode whose breakdown voltage is the desired constant voltage is connected across the load as shown in Fig.3. Rs-100 S2 Re www Ve 4/1/+ Vin Fig.3 www RL VI

Construct the circuit of Fig.3 Copy the results as shown in Table 2. V(V) VV) Table 2 4 4.5 5 5.5 6 7 00 8 8.5 9 10 VLV ILOMA) Iz(mA) IT(MA) Ri=1 kQ R₁-220 52

1) Plot Vin against IL. 2) Shade on your graph the area that now represents the useable range of Vin and IL