| Piezoelectric 3.3V Power Supply with LDO Post Regulator for Reduced Output Ripple - The LTC3588-1 integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric transducers. __ Linear Technology/Analog Devices App Note, Mar 23, 2010 Piezoelectric Energy Harvester & 1.2V Secondary Rail - The LTC3388-1/LTC3388-3 are high efficiency step-down DC/DC converters with internal high side and synchronous power switches that draw only 720nA typical DC supply current at no load while maintaining output voltage regulation. The EN pin can be used to activate the LTC3388-1/LTC3388-3. For instance, in this circuit the __ Linear Technology/Analog Devices App Note, Jul 23, 2010
Piezoelectric Energy Harvester with Battery Backup - The LTC3388-1/LTC3388-3 are high efficiency step-down DC/DC converters with internal high side and synchronous power switches that draw only 720nA typical DC supply current at no load while maintaining output voltage regulation. The EN pin can be used to activate the LTC3388-1/LTC3388-3. For instance, in this circuit the__ Linear Technology/Analog Devices App Note, Jul 23, 2010
Quartz_Clock_Solar_Powered - Connect a solar panel to a quality AA size 1One of my homes in Colorado had a large battery powered quartz clock above the fireplace. It was powered by an AA size 1.5v alkaline cell. The battery would run the clock for about a year or so, then I would have to break out a tall step ladder and replace the battery for another year or so of operation. That gave me a great 10:1 energy margin. . . . Hobby Circuit by David Johnson P.E.-September 21, 2017
Simple Circuit Photovoltaic Charger - The LTC4071 allows simple charging of Li-ion/Polymer batteries from very low current, intermittent or continuous charging sources. A near-zero current low battery latching disconnect function protects even the lowest capacity batteries from deep discharge and potentially irreparable damage. The 550nA to 50mA operating current__ Linear Technology/Analog Devices App Note, Oct 26th 2010
Single-Cell Photovoltaic NiMH Trickle Charger - The LTC3105 is a high efficiency step-up DC/DC converter that can operate from input voltages as low as 200mV. A 250mV start-up capability and integrated maximum power point controller (MPPC) enable operation directly from low voltage, high impedance alternative power sources such as photovoltaic cells, TEGs (thermoelectric__ Linear Technology/Analog Devices App Note, Oct 26th 2010
Small Solution Size 1.8V Low Voltage Input Piezoelectric Power Supply - The LTC3588-1 integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric transducers. __ Linear Technology/Analog Devices App Note, Mar 23, 2010
Smoothing Capacitors - Find out more about the uses of smoothing capacitors in renewable energy circuits. __ Designed by REUK-Renewable Energy UK website
Solar & Piezo Energy Harvester & Battery Life Extender - The LTC3330 integrates a high voltage energy harvesting power supply plus a DC/DC converter powered by a primary cell battery to create a single output supply for alternative energy applications. The energy harvesting power supply, consisting of an integrated full-wave bridge rectifier and a high voltage buck converter, harvests__ Linear Technology/Analog Devices App Note, Sep 19th 2013
Solar Fireflies In Jar Light - When I was a kid, growing up in Illinois, I remember catching fireflies and putting them into a jar. I loved watching them flashing away at night. Later, I would let them out to live another day. . . . Circuit by David Johnson P.E.-September 21, 2017
Solar Panel Charging 12V Battery through Ideal Diode to Prevent Back Feeding - in solar power systems, Schottky diodes are used to prevent discharge of the battery during hours of darkness. Unfortunately, the voltage drop and power dissipation of a Schottky diode can be quite large when used with high wattage solar panels, thus reducing the amount of power available to charge the battery. This circuit__ Linear Technology/Analog Devices App Note, Jun 15th 2010
Solar Panel Input 6V to 36VIN to 14.4V at 4.5A Buck Boost Converter 4-Cell LiFePO4 Battery Charger - The LTC4000-1 is a high voltage, high performance controller that converts many externally compensated DC/DC power supplies into full-featured battery chargers with maximum power point control. In contrast to the LTC4000, the LTC4000-1 has an input voltage regulation loop instead of the input current regulation loop. Features__ Linear Technology/Analog Devices App Note, Jun 25th 2013
Solar Powered Converter Extends Battery Life in Low Power 3V Primary Battery Applications - The LTC3129 is a high efficiency, 200mA buck-boost DC/DC converter with a wide ViN and VOUT range. It includes an accurate RUN pin threshold to allow predictable regulator turn-on and a maximum power point control (MPPC) capability that ensures maximum power extraction from non-ideal power sources such as photovoltaic panels. __ Linear Technology/Analog Devices App Note, Feb 15th 2013
Solar Powered Converter with MPPC Charges Storage Capacitor - The LTC3129 is a high efficiency, 200mA buck-boost DC/DC converter with a wide ViN and VOUT range. It includes an accurate RUN pin threshold to allow predictable regulator turn-on and a maximum power point control (MPPC) capability that ensures maximum power extraction from non-ideal power sources such as photovoltaic panels. __ Linear Technology/Analog Devices App Note, Feb 15th 2013
Solar Powered LED Driver - This figure shows an application for an LED driver supplied with a solar cell for an emergency LED torch. When the torch is off, the LTC3536 is in shutdown. The quiescent current of less than 1μA minimizes supercapacitor drain when the ambient light is no longer available. When the LED torch is switched on, the LTC3536 is turned__ Linear Technology/Analog Devices App Note, Oct 3, 2012
Solar Powered Super Capacitor Charger with MPPT - The input of the LTC3625 can also be driven by many widely available solar cells. In this circuit, MPPT (maximum power point tracking) is implemented by modulating the charge current based on the input voltage of the LTC3625. The LTC3625/LTC3625-1 are programmable supercapacitor chargers designed to charge two supercapacitors__ Linear Technology/Analog Devices App Note, Jul 23, 2010
Solar-Powered 2.2V Supply & 1.8V LDO with Li Battery Backup & Run Threshold Set to Battery Minimum Voltage - The LTC3104 is a high efficiency, monolithic synchronous step-down converter using a current mode architecture capable of supplying 300mA of output current. The LTC3104 includes an integrated, adjustable 10mA LDO to power noise sensitive functions. Additionally, the LTC3104 includes an accurate RUN comparator, thermal overload__ Linear Technology/Analog Devices App Note, Dec 5th 2011
Solar-Powered 2.2V Supply with Li Battery Backup & Run Threshold Set to Battery Minimum Voltage - The LTC3103 is a high efficiency, monolithic synchronous step-down converter using a current mode architecture capable of supplying 300mA of output current. Additionally, the LTC3103 includes an accurate RUN comparator, thermal overload protection, a power good output and an integrated soft-start feature to guarantee that the__ Linear Technology/Analog Devices App Note, Dec 5th 2011
Thermoelectric Generator to 2.4V Super Capacitor Charger - The LTC3105 is a high efficiency step-up DC/DC converter that can operate from input voltages as low as 200mV. A 250mV start-up capability and integrated maximum power point controller (MPPC) enable operation directly from low voltage, high impedance alternative power sources such as photovoltaic cells, TEGs (thermoelectric__ Linear Technology/Analog Devices App Note, Oct 26th 2010
Tool Shed LED Light - I have a lean-to 8ft by 12ft shed next to my house. It is full of lawn chemicals and garden supplies. There were times when I needed to get something from inside the shed during the dead of night. Early on I had to use a flashlight. But later, I installed a series of five 12v LED light strips on the ceiling. Each strip contained 15 3v white LEDs. The strip had 5 strings of three LEDs, wired in series, with a 150 ohm current limiting resistor. . . . Circuit by David Johnson P.E.-July 14, 2017
Unipolar Energy Harvester Charges Battery Backup - The LTC3109 is a highly integrated DC/DC converter ideal for harvesting surplus energy from extremely low input voltage sources such as TEGs (thermoelectric generators) and thermopiles. Its unique, proprietary autopolarity topology allows it to operate from input voltages as low as 30mV, regardless of polarity. In this circuit, __ Linear Technology/Analog Devices App Note, Jul 8th 2010
Well Pump Flasher & Beeper - Several years ago I installed a box on my water well pump head. At the well head, the solar powered box flashed a very bright LED light and chirped a very load siren, whenever the pump motor was in operation. After many years of service, the box finally became corroded from rain water and died. So, I thought it was time to redesign the circuit and build up a replacement. . . . Circuit by David Johnson P.E.-June 29, 2017 |
