DUAL power supply (JFET)

Discussion in 'General Electronics Chat' started by nightcrawler218, Mar 31, 2013.

Preferable choice for dual supply in low voltage electronic circuits

  1. JFET

    0 vote(s)
  2. Relay

    0 vote(s)
  3. Zener+Transistor

    0 vote(s)
  4. Comparators

    0 vote(s)
Multiple votes are allowed.
  1. nightcrawler218

    Thread Starter Member

    Dec 24, 2012

    I am trying to do a simple modification in a standard circuit by adding dual-power supply with automatic selection ( Since I dont want to manually setup the jumper wires for power port selection.) JFETs are my choice for making this alteration.

    The purpose:
    The device will take the first power source. If both the power sources are connected accidentally, the device will draw current ONLY from the first connected source & the second source will be entirely blocked.

    Suggestions & Help:
    I have attached the circuit & datasheet of the P-Channel JFET (2N5460) with this post. Any suggestions regarding modifications & alteration of the circuit will be appreciated.

    2N5460 Datasheet - http://www.eng.yale.edu/ee-labs/morse/compo/datasheets/2n5460-d.pdf

    Thanks in Advance
    Last edited: Mar 31, 2013