Comments (4)
pyr0ball
commented on September 26, 2024
Original resistor ladder functionality has been verified working. Possibly will still move to pwm/dac for more grainular control
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pyr0ball
commented on September 26, 2024
Possible code for 10-bit pwm DAC: https://www.avdweb.nl/arduino/adc-dac/fast-pwm-dac
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pyr0ball
commented on September 26, 2024
After testing, no need for 10-bit, analog write works just fine with proper filtering.
Testing (experimentation) shows best frequency response and smoothing (+7mV / -12mV) is achieved with:
10k resistor
3.3uF + 10uF SMD ceramic capacitors
Auto-Adjust reconfiguration can be enhanced using these topologies:
- Linear Resistor ladder used to adjust gain on first amp stage
- PWM DAC for adjusting comparator noninverting input
- Adjust V_FOLLOW net to output ~2v for wider adjustment window
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pyr0ball
commented on September 26, 2024
Implementation fixed in 2297f15
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