Variable zener diode


Posted on Feb 12, 2013

The circuit behaves like a zener diode over a large range of voltages. The current passing through the voltage divider R1-R2 is substantially larger than the transistor base current and is in the region of 8 mA. The stabilizing voltage is adjustable over the range 5-45 V by changing the value of R2. The total current drawn by the circuit is variable over the range 15 mA to 50 mA


Variable zener diode
Click here to download the full size of the above Circuit.

This value is determined by the maximum dissipation of the zener diode. In the case of a 250 mW device, this is of the order of 50 mA.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Siren Circuits using timer 555
    Dc static switch
    Digital-logic-probe
    Stabilized-wien-bridge-oscillator
    Dc Motor-Speed Control
    Stamp9G20
    Automatic Ac Line Voltage Selector
    Record audio with the MSP430 microcontroller
    Op Amp Wien-Bridge Oscillator
    Dynamic Microphone Preamplifier using C945 transistor
    Proximity detector schematic



    Top