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xro:eh2024_badge_homeassistant_esp32 [2024-10-17 02:14] xro |
xro:eh2024_badge_homeassistant_esp32 [2024-10-17 02:32] (current) xro |
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| * It still works with about 1.8V where it takes about 50mA but has almost no activity and is very dark | * It still works with about 1.8V where it takes about 50mA but has almost no activity and is very dark | ||
| * which is perfect, so we can control it's activity by controlling it's supply voltage | * which is perfect, so we can control it's activity by controlling it's supply voltage | ||
| + | |||
| + | Basically we want to trick the step-down module to generate less output by changing the feedback voltage it sees by generating an offset voltage using the ESP32's DAC. | ||
| {{ :xro:eh2024_badge_esp32.svg |}} | {{ :xro:eh2024_badge_esp32.svg |}} | ||
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| * [[https://github.com/btittelbach/esphome_config_examples/blob/main/eh_badge_power_indicator.yaml|ESPhome Example YAML]] | * [[https://github.com/btittelbach/esphome_config_examples/blob/main/eh_badge_power_indicator.yaml|ESPhome Example YAML]] | ||
| + | * [[https://www.analog.com/en/resources/technical-articles/digital-adjustment-of-dcdc-converter-output-voltage-in-portable-applications.html|Helpful Document explaining different options of controlling power supply voltage]] | ||
| ==== Result ==== | ==== Result ==== | ||
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