https://github.com/shadow578/attiny-sleep-mcu

use a Attiny13a to switch power to e.g. a ESP8266, to build a power-efficient weather station
https://github.com/shadow578/attiny-sleep-mcu

Last synced: 12 months ago
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use a Attiny13a to switch power to e.g. a ESP8266, to build a power-efficient weather station

• Host: GitHub
• URL: https://github.com/shadow578/attiny-sleep-mcu
• Owner: shadow578
• Created: 2024-10-15T06:53:07.000Z (almost 2 years ago)
• Default Branch: main
• Last Pushed: 2025-04-18T11:51:23.000Z (over 1 year ago)
• Last Synced: 2025-04-19T01:03:02.832Z (over 1 year ago)
• Language: C++
• Size: 921 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# attiny13-sleep-mcu

use a Attiny13a to switch power to e.g. a ESP8266, to build a power-efficient weather station

for schematic, see docs/schematic.pdf

## Power Usage

the following table shows the power usage of the Attiny13a during sleep mode (attiny13_slow environment):

| Supply Voltage | Power Usage | Notes                                                    |

| -------------- | ----------- | -------------------------------------------------------- |

| 1.8 V          | 4.3 uA      | On the low end of the voltage range, may not be reliable |

| 2.0 V          | 4.7 uA      |

| 2.5 V          | 5.3 uA      |

| 3.0 V          | 5.8 uA      |

| 3.3 V          | 6.0 uA      |

| 3.5 V          | 6.1 uA      |

| 4.0 V          | 6.7 uA      |

| 4.5 V          | 7.4 uA      |

| 5.0 V          | 8.2 uA      |

> [!NOTE]

> measurement were taken with a UNI-T UT61C multimeter, and may not be accurate.

>

> test procedure:

>

> 1. set voltage to desired value

> 2. power on device under test

> 3. wait for voltage to settle

> 4. assert `POWER_DOWN` pin

> 5. wait for current to settle

> 6. measure current

> 7. power off device under test