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Adafruit S-35710 Low-Power Wake Up Timer Breakout

Adafruit S-35710 Low-Power Wake Up Timer Breakout

Pimoroni

£4.13

Price read from Pimoroni on 2026-10-22. Check before buying.

The Adafruit S-35710 Wake Up Timer is a low power 'watchdog timer' chip that can be programmed to alert with a digitally-configurable alarm from 1 second up to 194 days, thanks to a 24-bit second counter. It's an interesting alternative to a real time clock or internal sleep timer and might be useful for some ultra-low-power projects that want to have a separate (and possibly separately-powered) chip to handle time-keeping and alarms. We covered this component on EYE ON NPI and thought it would make for a nice breakout in the shop . Usage is pretty simple: on I2C write of the timer register, t

Pimoroni's own words, read from their page.

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The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.