VFO-005

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P17251-720px.jpg

Variable Frequency Oscillator (VFO)

  • Arduino Pro Mini
  • AD9833 Function Generator
  • Rotary Encoder/Breakout Board
  • 128x32 OLED
  • Breadboard Power Supply
    • 3.3V operation

AD9833 Function Generator

AD9833s-P17243-720px.jpg

  • Digitally programmable frequency and phase
    • 12.65 mW power consumption at 3 V
    • 0 MHz to 12.5 MHz output frequency range
    • 28-bit resolution: 0.1 Hz at 25 MHz reference clock
    • Sinusoidal, triangular, and square wave outputs
    • 2.3 V to 5.5 V power supply
    • No external components required
    • 3-wire SPI interface
    • Extended temperature range: −40°C to +105°C
    • Power-down option
    • Update Rate: 25(max)
    • VOUT Maximum: 0.65V
    • VOUT Minimum: 38mV
    • VOUT Temperature Coefficient: 200°
    • Input High Voltage: 1.7-2.8V
    • Input Low Voltage: 0.5-0.7V
    • Input Current: 10µA
    • Input Capacitance: 3pF
    • Operating temperature range is −40°C to +105°C; typical specifications are at 25°C

Arduino Pro Mini

  • 3.3V
  • 8 MHz

ArduinoProMini P17147 720px.jpg

ArdProMini-Pins.PNG

Rotary Encoder/Breakout Board

RotaryEncoderCAD.PNG

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128x32 OLED

  • Ebay
  • 5V/3.3V operation

VRO-004 P17146-720PX.jpg

Breadboard Power Supply

  • On breadboard build

BrBdPS-IMG 4809-720px.jpg

Schematic

VFO-005 Schematic.PNG