• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

  • 1000+ Circuits
  • Privacy Policy
  • About Us
  • Contact
  • Disclaimer
  • Videos – Circuit Test Results
You are here: Home / Battery Chargers / Solar Boost Charger Circuit with LED Driver Dimmer

Solar Boost Charger Circuit with LED Driver Dimmer

Last Updated on March 13, 2019 by Swagatam 6 Comments

The article explains a simple solar boost charger with LED driver circuit which also includes a single push dimmable feature. The idea was requested by Mr. Ashutosh.

Technical Specifications

Hi swagatam,

Myself Ashutosh. I m very new to ur website, n i ll say u r superb, u r doing one of the best thing by helping hobbyists. Thank you very much. I want an LED driver cum charger circuit for our project. i know u already have thousands of request pending and at the same time u might be working on different circuits, even though i want to ask for it, my circuit details are as below-

1. It's an LED lamp
2. Having 3volt (0.5watt) of solar panel for charging the battery.
3. Have to charge 3.6 volt battery from the solar panel (for this may be some boost ic is required ).
4. Regarding switching---> have one switch---> when all the connection are there the LED should be in off mode---> after 1st press it should glow in full brightness i mean 100% duty cycle----> 2nd time when i press 2nd time the switch the LEDs brightness should decreased by 40-50%---> when i press the switch 3rd time the LED should get more dimmed(say the brightness should decreased by 70-80%)----> and when i press the switch 4th time the LED should get off.
5. Circuit should be very compact(made up of very few components) and no use of microcontroller plz as, i dnt have that much idea about the microcontroller.
6. Also suggest the best LED for brightness whether it ll be an SMD LED and it's specification.

it won't be so difficult for u sir. i m bookmarking you this page for your reply, as i know from ur site, ur best thing is u used to reply almost everyone  keep doing it. A positive reply is expected from you. Thank you very much.

The Design

  • When an input is applied, the transistor instantly goes into an oscillating mode inducing a relatively stepped up voltage across the connected battery.
  • The process starts charging the battery and depending upon the position of the IC 4017 output illuminates the connected LED with a certain intensity.
  • The IC 4017 operates in three modes as requested above.
  • The modes can be selected by pressing the given button momentarily.
  • The above toggling sequences the output from the pin2 to pin7 in steps producing different glow intensities on the LED.
  • At the first pin out pin#3 (not shown) the LED shuts down completely as it's not associated with the switching network in anyway.

 




Previous: Zero Drop LDO Solar Charger Circuit
Next: 5V 3 Amp Fixed Voltage Regulator Circuit using IC LM123

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

You'll also like:

  • 1.  What’s Islanding in GTI (Grid Tie Inverter)
  • 2.  18V Cordless Drill Battery Charger Circuit
  • 3.  1500 watt PWM Sinewave Inverter Circuit
  • 4.  Potato Battery Circuit – Electricity from Vegetables and Fruits
  • 5.  How to Charge a Cell Phone from a 1.5V Battery
  • 6.  How to Make Simple Solar Cooker at Home

Please Subscribe (Only if you are Genuinely Interested in our Newsletters)


 

Reader Interactions

Comments

    Your Comments are too Valuable! But please see that they are related to the above article, and are not off-topic! Cancel reply

    Your email address will not be published. Required fields are marked *

  1. Search Related Posts for Commenting

  2. Nelio Abreu says

    Hi Swag,

    What’s the value and type of the capacitor?
    Best Regards.
    Nelio Abreu

    Reply
    • Swagatam says

      Hi Nelio, capacitor value can be 1uF/25V

      Reply
  3. Bibin Edmond says

    oh….! ok.. thanx swagatam.. !

    Reply
  4. Swagatam says

    Hi Edmond,

    It's for enabling the switching only after at least 1V passes through push button as it's pressed, so that the IC responds only to legit pushes and not accidental leakages.

    Reply
  5. Bibin Edmond says

    Hi swagatam,

    what's the use of two 1N4148 diodes on the circuit.. ?

    Reply
  6. Swagatam says

    You are welcome Ashutosh,

    TR1 is wound over a toroid type ferrite core with 20:20 turns of any thin super enameled copper wire.

    The switch is an ordinary push-to-ON type of switch or simply a push button which should switch ON only momentarily when pressed and disconnect when released.

    The boost circuit is explained here more elaborately:

    https://homemade-circuits.com/2012/10/1-watt-led-driver-using-joule-thief.html

    Reply


  7. COMMENT BOX IS MOVED AT THE TOP


Primary Sidebar

Electronic Projects Categories

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (51)
  • 4060 IC Circuits (25)
  • 555 IC Circuits (92)
  • 741 IC Circuits (18)
  • Amplifiers (49)
  • Arduino Engineering Projects (82)
  • Audio Projects (84)
  • Battery Chargers (75)
  • Car and Motorcycle (87)
  • Datasheets (45)
  • Decorative Lighting (Diwali, Christmas) (31)
  • DIY LED Projects (81)
  • Electronic Components (97)
  • Electronic Devices and Circuit Theory (35)
  • Electronics Tutorial (99)
  • Fish Aquarium (5)
  • Free Energy (34)
  • Games (2)
  • GSM Projects (9)
  • Health Related (17)
  • Heater Controllers (23)
  • Home Electrical Circuits (98)
  • Incubator Related (6)
  • Industrial Electronics (26)
  • Infrared (IR) (39)
  • Inverter Circuits (94)
  • Laser Projects (10)
  • LM317/LM338 (21)
  • LM3915 IC (24)
  • Meters and Testers (54)
  • Mini Projects (153)
  • Motor Controller (64)
  • MPPT (7)
  • Oscillator Circuits (12)
  • PIR (Passive Infrared) (8)
  • Power Electronics (33)
  • Power Supply Circuits (66)
  • Radio Circuits (9)
  • Remote Control (46)
  • Security and Alarm (56)
  • Sensors and Detectors (115)
  • SG3525 IC (5)
  • Simple Circuits (72)
  • SMPS (30)
  • Solar Controllers (60)
  • Timer and Delay Relay (51)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (38)
  • Ultrasonic Projects (12)
  • Water Level Controller (45)

Follow Homemade Circuits

Facebook
Twitter
YouTube
Instagram
My Facebook-Page
Quora

Feeds

Post RSS
Comment RSS

Circuit Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

© 2021 · Swagatam Innovations