Joule-Thief™enabled energy harvesting DC power supplies can be used in a wide variety of applications. Some examples are wireless sensor network, asset tracking using active RFID & GPS, wireless switches, medical implants, structural health & condition monitoring. Other applications are in building automation, HVAC controls and monitoring, supply chain management, supervisory control in agriculture and the food processing industry.

Environments suitable for Joule-Thief™include mechanical energy sources such as industrial machinery, structural vibration, roads, buildings, bridges, vehicles (automobiles, trucks, trains, planes & ships) and human motion.

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AdaptivEnergy stresses the mantra, “Think Joules, not Watts” as these products are a perfect fit for embedded systems in continuous or asynchronous energy mode. The Joule-Thief™performance is typically quantified in terms of energy output and/or average power. This data can be obtained from the datasheets available on the website. The actual power outputs may vary depending on the vibration environment in customer application.

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The Joule-Thief™devices come with various power management and storage options. The storage capacitors and rechargeable batteries in AdaptivEnergy's custom Energy Key™ electronics are designed based on the power management requirements of the application, and can satisfy needs across the majority of wireless protocols (including 802.11, 802.15.4, Zigbee, Zigbee PRo, 6LoWPAN, and DASH7). AdaptivEnergy's presently available storage options include super capacitors, lithium coin cell batteries, lithium polymer batteries, and low leakage thin film batteries.

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Joule-Thief™ devices have an excellent effective power density The standard modules currently offered by AdaptivEnergy are approximately 5.0cm x 2.5cm 2.5cm (2" x 1" x 1") in size. Exact deimensions and weight can be obtained from the product datasheets. AdaptivEnergy has built effective energy harvesters ranging from 3cc volume to 140cc and can scale the size of the solution based on the power needs of the application.

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The existing operating temperature range for Joule-Thief™modules with onboard capacitive storage (standard or super-capacitors) is -40 °C to 80 °C. Alternative energy storage options (for example, rechargeable thin film batteries and Li-ion batteries) will produce more limited operating ranges.

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The Joule-Thief™devices are based on AdaptivEnergy’s proprietary Ruggedized Laminated Piezo (RLP®) technology that has been successfully tested to billions of cycles without failure. The Mean Time Between Failures (MTBF via QALT) of a 60 Hz resonant Joule-Thief™device (JTF-060e5) is 116000 hours when operating at room temperature and 1 grms vibration.

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The Joule-Thief™ DC power supplies are designed to act as power solutions for low power electronics. They are easy to install and come with a quick start guide & comprehensive user manual. The user will be informed about mounting instructions for attaching the Joule-Thief™devices to vibrating structures. The output of the AdaptivEnergy energy harvester is a DC voltage (presently from 2.75V to 3.30V although other voltages are available) that can be used to power any user application with an appropriate energy budget. In the Joule-Thief™demonstration kit, a sensor board is included for the user to evaluate a self-sustaining wireless application using vibration energy.

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Customers are encouraged to contact AdaptivEnergy directly with questions and orders about Joule-Thief™power supplies by calling (757) 320-1525 or via emails at Sales@AdaptivEnergy.com .

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