Difference between revisions of "Anchor"
From Hackstrich
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** 5A/100V maximums | ** 5A/100V maximums | ||
*** 500W dissipation in a FET is a bit nuts, so it won't be 5A *at* 100V | *** 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: | * MCU needs: | ||
** 2 or 3 16-bit ADC channels (voltage, current, heatsink temperature, though the latter could be a digital sensor if needed) | ** 2 or 3 16-bit ADC channels (voltage, current, heatsink temperature, though the latter could be a digital sensor if needed) | ||
Revision as of 15:33, 21 December 2010
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.
- Constant current and constant voltage options
- 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)
