Solar Cell Circuits Page 5c

Solar Cell Circuits Page 5c
Solar Cells: # - B C-H I - M N - R S T - Z
Last Updated on: Wednesday, November 29, 2017 05:39 AM

Circuits Designed by Dave Johnson, P.E. :

Solar Cell Test Fixture
If you are considering building your own solar panel, you might try building the solar cell tester shown below. When constructing a solar panel it is important to make sure that all the solar cells used in the panel be closely matched for their short circuit current. One weak cell will lower the efficiency of the whole panel. The system shown allows individual solar cells to be tested for their short circuit current under a constant light intensity condition....

Solar Powered Lithium Ion Battery Charger
The circuit below feeds a controlled current and voltage to a 3.6v lithium ion battery. The current is limited to 300ma and the voltage is limited to 4.2 volts. The circuit uses a LTC1734 IC from Linear Technology. No diode is needed between the circuit and a 6 volt solar panel....

Solar PV cell Test Fixture
This is an illustration of a test fixture, which can be used to test individual solar cells for short circuit current. Using a PIN photo diode and a control circuit, the solar cells can be tested under constant light level conditions. A halogen incandescent lamp is used as the light source. (added 7/06)

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

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Solar power battery charger - Schematic only, no circuit description

Solar power supply - Schematic only, no circuit description

Solar power supply - This circuit delivers either 4.8 or 7.2 V regulated at 15 mA with a 3-V input from a bank of photocells. Rl should be 453 kQ for a 7.2-V output and 274 Ø for a 4.8-Vdc output. Regulator efficiency is around 70%. This should be considered when selecting suitable solar cells.

Solar Powered FM Bug - There are many miniature FM transmitter (bug) circuits online, this one is unique in that it runs completely on solar power. No battery is required. As long as the sun is shining on the PV panel, the circuit will transmit. The bug is useful as a "remote ear", and can be used for anything from listening birds to surveillance work. The mic preamp and oscillator circuits were borrowed from a common circuit found around the Internet, I added a regulated solar power supply and an RF amp that extends the range and improves frequency stability.... [G. Forrest Cook]

Solar Powered Flood Light Using NiMH Cells - There are many solar powered garden lights available. Most of the devices offered at the home improvement stores have very poor performance. Their batteries are too small, the light launched is weak and the solar panels are undersized. None of the devices I have tested would operate through a typical night....[Designed by David A. Johnson, PE]

Solar Powered LED Garden Light - Reverse engineered circuit diagram of a popular mass produced solar light. The light automatically turns on when there is no light falling upon the solar cell, so the parts count is minimal. The charging circiut is not particularly efficient since the battery must charge through a plain diode.... [Circuit by Stepan Novotill]

Solar Powered Lithium Ion Battery Charger - This circuit is for a solar powered white LED with automatic activation in the dark. It can be used for both indoor and outdoor night light applications. For indoor uses, if the circuit is operated near another lamp, it can be set to automatically turn on when the other lamp is turned off. Circuit features include selectable off/on/auto settings, a built-in low voltage disconnect circuit for longer battery life and a light activation circuit with hysteresis.... [Hobby Corner Circuit by Dave Johnson]

Solar Powered Nestbox CCTV Camera - Observe wildlife inside a nestbox with a solar powered wireless CCTV camera…. [REUK - Renewable Energy UK website]

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.... [G. Forrest Cook]

Solar Powered Poultry Lighting - Put together a solar system to power poultry lighting - increase winter egg production… [REUK - Renewable Energy UK website]

Solar Powered Reading Lamp - 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.... [G. Forrest Cook]

Solar Powered Wireless CCTV - Use a solar panel to power a wireless CCTV system…. [REUK - Renewable Energy UK website]

Solar PV cell Test Fixture - This is an illustration of a test fixture, which can be used to test individual solar cells for short circuit current. Using a PIN photo diode and a control circuit, the solar cells can be tested under constant light level conditions. A halogen incandescent lamp is used as the light source. (added 7/06) …. [Designed by David A. Johnson]

Solar Revolver - A single-chip solarroller circuit with reverse and turning capability; based on a 1381 SE. (added 11/05)

Solar Robots - Make your own solar powered robot at home using things you probably already have. Transistors, resistor, capacitor, solar battery and flashing LED are available at any electronic store, if you don't already have them. Solar cells out of calculators work as well, you might want to use more than one since they are really small....

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