The Adafruit S-35710 low-power wake up timer is a versatile watchdog timer chip with a 24-bit second counter, capable of being programmed for alarms ranging from 1 second to 194 days. It offers a viable alternative to real time clocks and internal sleep timers, making it a potentially valuable component for ultra-low-power projects. This product was recently featured on EYE ON NPI and is now available for purchase in our shop.
Easily utilize this device by writing to the timer register via I2C, initiating a countdown from 0 seconds and a high output signal. When the timer matches the register, the output signal switches to low. This efficient timer has a low power consumption of only 0.2uA. The output is open-drain and can be inverted by using the switch to route the signal through an N-channel FET, reversing the polarity.
Please take note that upon powering up, the OUT line will default to a low state. This makes it unsuitable for use as a low-power sleep manager, and is only suitable for watch-dog-like timings. Therefore, it cannot be connected to your microcontroller's reset or enable line for self-powering, as it will be disabled or reset upon power up. However, it may still be a useful chip for those who require a long delay signal or a more sophisticated power management system.
To get you going fast, we spun up a custom-made PCB in the STEMMA QT form factor, making it easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the S-35710 or to chain it with a wide range of other sensors and accessories using a compatible cable.
Technical Details
Shipping rates Australia wide and New Zealand
FAQ:
- How do I estimate shipping for my order?
- Add products in the shopping cart and head to the checkout page to estimate the shipping.
Dispatch time
Unless expressly agreed otherwise with you, we will not commence delivery of an order until we have received cleared payment of the purchase price in full.
All orders placed before 11 am AEST (Monday to Friday) will ordinarily be processed on the same day.
We will endeavour to ship the Products by the applicable time indicated on the website, but all times are indicative only. All shipping times are dispatch times only, and actual delivery dates will depend on the shipping method chosen, delivery address and delivery service provider.
Note- Please make a note during purchase if you require any item urgently. However we cannot guarantee that we will be able to comply with any request.
*Go to Australia post delivery time calculation to get various Australia post service in your area please use our shipping postcode Thomastown, 3074 as the "from" address - https://auspost.com.au/parcels-mail/delivery-times.html?ilink=tools-open-deliv-times.
We ship all products throughout mainland Australia, Tasmania and New Zealand - Including Darwin, Melbourne, Sydney, Tasmania, Adelaide, Brisbane, Perth, all metro and regional areas but do not deliver to areas in Australia where the Australia Post delivery network is not available.
Check Express shipping delivery coverage area at - http://auspost.com.au/parcels-mail/delivery-areas.html
Receipt of deliveries
Deliveries to post office boxes are not permitted where delivery is by courier. If delivery is by courier and nobody is available at the delivery address to accept delivery when delivery is attempted then the courier may either:
- leave the relevant parcel at the unattended address (the courier will do so if specified in your delivery requirements); or
- re-attempt delivery at a later time or date, in which case we may charge you an additional re-delivery fee.
Note that if a delivery is left unattended at the shipping address and is subsequently stolen then the theft is your responsibility, not ours.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.