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Look at the datasheet of the ATtiny45. In the section “Sleep Modes”, there is a table that lists the wake-up sources available for each sleep mode. For the mode “power-down”, INT0 is listed as a possible wake-up source, but there is a small footnote: For INT0, only level interrupt. This means that the CHANGE mode you are trying to use will not wake-up ...


3

ATTINY's are designed to easily do this since they can wake from power down sleep mode by a pin change... Basically you want to... Connect a normally-open push button between an IO pin and ground. Enable the pull-up on the IO. Enable the pin change interrupt on the IO pin. Enable interrupts. Enter "power down" sleep mode. When the button is pushed, it ...


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Two of those 10mA come from the ATECC608 crypto chip which idles at 2mA. That leaves 8mA for you to track down. The WiFi-NINA module has multiple "sleep" modes that range from 30mA down to 4.5µA. Since you can't be in the 30mA "modem sleep" mode (it's too high for your measurements) I suspect it enables "light sleep" at 800µA. The switching regulator ...


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standard current you can draw from a usb port is 500 mili ampere with 5 volt(you may get even more but it is not recommended) . so if you want to calculate sensors are very low current about 1~2 mA(but you must check out datasheet) turbidity for example draws 30 mA temperature ds1820 is 1 mA flow is up 2 mA the LEDs based on resistors series with them ...


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