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Solar Energy Circuits

Solar Energy Circuits:   #'s - R      S - Z

 

Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :
Solar Path Light Improvement -  Use the circuit below was designed to replace the guts of an existing path light assembly with one which has a much better performance.  I suggest using a quality 10 cell solar panel with at least a 4 square inch area.  Buy a panel with solar panels that. . . Circuit by David A. Johnson P.E.-March, 2011

Solar-Powered Pump Motor Controller -  A Discover Circuits visitor had a problem.  He needed a simple on/off controller for his solar powered water pump.  His system used two 12v 50 watt solar panels wired in series.  The power from the solar panels drove a submerged water pump.  However, during. . . Circuit by Dave Johnson P.E.-October, 2010

Water Pump controlled by Solar Power -  A Discover Circuits visitor had a problem.  He needed a simple on/off controller for his solar powered water pump.  His system used two 12v 50 watt solar panels wired in series.  The power from the solar panels drove a submerged water pump.  However, during . . . Hobby Circuit designed by David A. Johnson P.E.-October, 2010

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SCC3 20 Amp 12V Solar Charge Controller -  The SCC3 is a solar charge controller, its function is to regulate the power flowing from a photovoltaic panel into a rechargeable battery.  it features easy setup with one potentiometer for the float voltage adjustment and an equalize function for periodic overcharging.  Automatic temperature compensation optimizes battery charging over a wide range of temperatures.  The SCC3 is robust, it can handle reverse polarity connection of both the battery and photovoltaic panel.   __ Designed by G. Forrest Cook

Self Powered Solar Box Furnace -  This project involves the construction of a self contained solar box furnace (Photo 1).  I assembled the prototype with materials that I had laying around my workshop.  it is suitable for heating up a small room or a detached shed.  I use the furnace to warm up my garage, it takes the chill out of a fairly large space when the weather is cold, but sunny.  it is possible to scale this project up to any size, a larger version, or a set of them, could be used to add a lot of supplemental heat a house __ Designed by G. Forrest Cook

Sensor Electronic Tracker with H-Bridge Drive -  I decided to make a commercial surface mount PC board using the LED2 sensor concept.  it is quite sensitive and can track to a few degrees of accuracy in bright sunlight.  if a blocking shadowis used the accuracy is better than 1/4 degree, that's about as good as you can get with an active feedback sensor.  The board is a tiny.7"x1.4" __ Contact Duane C. Johnson

Sensor Electronic Tracker with Simple Circuit Solar Charge Controller -  The design philosophy for this tracker was to make it more robust and self contained. I included a charge controller for rechargeable batteries intending them to be NIC ds to run the actuators. Since the charger is there it might as well be capable of running a large PV panel with lead acid batteries. __ Contact Duane C. Johnson

Shunt-mode Solar/Wind Charge Controller -  This circuit is for a switching shunt-mode charge controller.  in a shunt-mode circuit, the solar panel is permanently connected to the battery via a series diode.  When the solar panel charges the battery up to the desired full voltage, the shunt circuit connects a resistive load across the battery to absorb the excess power from the solar panel __ Designed by G. Forrest Cook

Simple Circuit MPPT (maximum power point tracker) for photovoltaic arrays -  A new technique is presented for tracking the maximum power point (MPP) of solar arrays.  Although the control circuit is extremely simple and robust, its Dynamics are complex.  The MPP becomes inherently the global attractor of the system, thus ensuring optimum operation under transient and steady-state conditions.  Experimental results confirm excellent tracking effectiveness and rapid dynamic response.   __ Designed by Yan Hong Lim and D.C. Hamill

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

Solar AA Battery Charger -  This almost trivial circuit may be used to charge a pair of AA or AAA sized cells insun __ Designed by G. Forrest Cook

Solar Energy Meter -  Simple project that turns 8051SBC to be a dedicated instrument for measuring the amount of energy produced by photovoltaic power system.   __ Designed by Wichit Sirichote

Solar Panel Charge Controller/Low Voltage Disconnect -  The SPC3 is a solar power center, it can handle all of the power functions for a solar charged 12 Volt DC system. The SPC3 contains a 9 amp photovoltaic charge controller, a 10 amp low voltage load disconnect circuit and a pair of built-in white LEDs for area illumination. The low voltage disconnect circuit has a load on-off switch and a battery low voltage indicator. By using the SPC3 as the center of a solar powered device, long battery life is assured. The SPC3 can be used for a stand-alone solar lighting system, it can also be used for making solar powered audio and radio devices. __ Designed by G. Forrest Cook

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 Current Meter -  This circuit is used to measure the current from a solar panel.  it has very low power loss for currents in the 0-10A range.  it also works as a general purpose DC current meter.  The circuit can be used on either the positive or negative side of a DC circuit __ Designed by G. Forrest Cook

Solar Panel Current Meter -  This circuit is used to measure the current from a solar panel.  it has very low power loss for currents in the 0-10A range.  it also works as a general purpose DC current meter.  The circuit can be used on either the positive or negative side of a DC circuit __ Designed by G. Forrest Cook

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 Path Light Improvement -  Use the circuit below was designed to replace the guts of an existing path light assembly with one which has a much better performance.  I suggest using a quality 10 cell solar panel with at least a 4 square inch area.  Buy a panel with solar panels that. . . Circuit by David A. Johnson P.E.-March, 2011

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 Garden Light with PCB layout -  This simple flyback/blocking oscillator LED power supply was adapted to and built into solar powered garden light by a talented experimenter in the United States known as "mrpiggss".  The method of switching the power supply off during daylight hours, thus allowing the rechargeable cell to recharge, was taken from a circuit design by Nick Baroni, of Willetton, Washington, and published on the siliconchip.com. Au website. __ Designed by Dick Cappels

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 Night Light -  The goal of this project was to produce a self contained reading lamp that could be used by students in developing countries for reading at night.  The circuit can be used for a wide variety of lighting applications __ Designed by G. Forrest Cook

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 Server -  Build the solar station for insolation measurement with Ubuntu server 7.10 and a 24-bit Delta-sigma converter __ Designed by Wichit Sirichote

Solar switching regulator, Part 1 -  Circuit diagram - published in Silicon Chip Magazine January 1994 Part 1/2 __ Designed by  otakarpriboj @ otakarpribo j. com.au

Solar switching regulator, Part 2 -  Circuit diagram - published in Silicon Chip Magazine January 1994 Part 1/2 __ Designed by  otakarpriboj @ otakarpribo j. com.au

Solar tracking control system -  zyx __ Contact Duane C. Johnson

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

Solar-Powered Pump Motor Controller -  A Discover Circuits visitor had a problem.  He needed a simple on/off controller for his solar powered water pump.  His system used two 12v 50 watt solar panels wired in series.  The power from the solar panels drove a submerged water pump.  However, during. . . Circuit by Dave Johnson P.E.-October, 2010

Switching Regulator-Solar, Part 1 -  Circuit diagram - published in Silicon Chip Magazine January 1994 Part 1/2 __ Designed by  otakarpriboj @ otakarpribo j. com.au

Switching Regulator-Solar, Part 2 -  Circuit diagram - published in Silicon Chip Magazine January 1994 Part 1/2 __ Designed by  otakarpriboj @ otakarpribo j. com.au

Switching Shunt-mode Solar/Wind Charge Controller -  This circuit is for a switching shunt-mode charge controller.  in a shunt-mode circuit, the solar panel is permanently connected to the battery via a series diode.  When the solar panel charges the battery up to the desired full voltage, the shunt circuit connects a resistive load across the battery to absorb the excess power from the solar panel __ Designed by G. Forrest Cook

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

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

Water Pump controlled by Solar Power -  A Discover Circuits visitor had a problem.  He needed a simple on/off controller for his solar powered water pump.  His system used two 12v 50 watt solar panels wired in series.  The power from the solar panels drove a submerged water pump.  However, during . . . Hobby Circuit designed by David A. Johnson P.E.-October, 2010

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Solar Energy Circuits:   #'s - R      S - Z

 


Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches



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