Report Power Supply +5v with Zener in Electronic Projects Design/Ideas Posted April 28, 2004 Yes i know the method by IC Regulator of Voltaje, but the conflict is that the power supply is for a University Lab. were a diode zener is needed. I have simulated in Multisim 7.0 the circuit with the diode zener 5.1 Volt and an ideal transistor. What transistor would you recommend me to use? Thanks.