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Last uploaded SPICE projects

  • Solar Tracker with Unipolar Step Motor Driven by a PIC16F877

    Created by joserami, published on 18-05-2012

    A solar tracker can maximize the power output from the solar panels, tracking the sun and keeping the panels aligned. It's been estimated that the yield can be increased form 30 to 60 percent by using a tracking system. This circuit implements a low cost automatic tracking system with a unipolar step motor driven by a PIC16F877 with four darlington transistors.

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Complicated Proteus 7.7+ Yes 21-30
  • NE555 timer application

    Created by Velocity64, published on 16-05-2012

    Timer circuit NE555 oscillator and pulsed timer. Constant frequency variable pulse length timer.

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number Documents
    Simple LTspice 4.14p No 11-20 1
  • NPN Transistors Double Balanced Mixer

    Created by MicroCapDesigner, published on 10-05-2012

    This mixer is usable for frequencies around 500Mhz. Discrete transistors mixers require the matching of the transistors' characteristics. This issue is overcome by applying a bit of feedback through emitter resistors. The base are driven with LO signal from a balun transformer. This mixer exhibits a conversion loss of 6dB and 15 to 17dBm of LO drive power.

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate Micro-Cap 10+ No 21-30
  • CMOS Input Buffer with PMOS and NMOS buffers

    Created by JacobBaker, published on 07-05-2012

    This circuit solution form an input buffer that operates well with input signals approaching full logic levels (ground or VDD).

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate LTspice IV No 11-20
  • Gilbert Mixer with CMOS 0.35 micron

    Created by MicroCapDesigner, published on 03-05-2012

    This circuit implements a CMOS conversion gain active mixer. The voltage conversion gain is the ratio of the RMS voltages of IF and RF signals.The power conversion gain is the ratio of the power delivered to the load and the power available to RF input.

    Project Type: Free

    Complexity Spice Software Software Version Full version Components number
    Intermediate Micro-Cap 9+ No 31-50