Hibouonics

Hypnos

Hypnos is a deep-sleep power management module for the Raspberry Pi Pico, with a built-in real-time clock. It lets the Pico enter a much lower-power sleep state than it can achieve on its own.

How it wakes the Pico

• Repeatedly, on a programmable interval
• At a preset time, using an RTC alarm
• With a physical wake button

On the board

• An RTC with backup battery support
• A wake button
• A battery power connector to power the Pico directly

Why it exists

On its own, a Pico’s sleep current is still too high for long-term battery use. Hypnos lets the Pico fully power down when idle, then wake only when needed—on a schedule or by a button. That suits duty-cycled work where the Pico only needs to run briefly, such as:

• Measuring temperature once per minute
• Updating an e-paper display periodically
• Battery-powered data logging
• Remote or unattended sensors

By cutting idle power, Hypnos can stretch battery life from days to weeks or months.

What makes it different

Software sleep modes leave the Pico partly on. Hypnos physically manages power and wake-up with an RTC, so you get much lower sleep current, reliable time-based wake-ups, and a simple path into battery-powered designs.

If a project spends most of its time sleeping, Hypnos can make long-term, battery-powered Pico work practical.

Connections

Firmware

The firmware is on GitHub: github.com/hibouonics/hypnos.