Anchor

Anchor will be an electronic current/voltage sink, for testing/characterizing power supplies and other similar tasks.

• Desired features/specs:
  • Constant current and constant voltage options
    • Maybe constant power too?
  • Ramp-up/down automatically and track outputs
  • Pulse load to test transient response
  • 5A/100V maximums
    • 500W dissipation in a FET is a bit nuts, so it won't be 5A *at* 100V
    • 100W continuous, 500W pulse might be reasonable? Would be nice anyway.
• MCU needs:
  • 2 or 3 16-bit ADC channels (voltage, current, heatsink temperature, though the latter could be a digital sensor if needed)
  • 1 PWM or DAC channel (input into op amp)
  • ATxmega16A4 seems a good fit for the MCU.
• An LCD would be cool to plot the response of load variations without a PC (transient response, current limits, etc.)
  • Could use a simple STN monochrome panel, would be cheap and work well
  • Could alternatively use a touchscreen OLED, would be expensive but look really cool
  • Middle ground would be a touchscreen LCD, which would be not-crazy-expensive and still look pretty cool
  • With any of these options, want the critical UI bits to be physical controls (current/voltage mode/setting)