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Remote Controlled Solar Lamp Intensity Controller Circuit

Last Updated on July 7, 2019 by Swagatam 7 Comments

caution electricity can be dangerous

The post details a simple remote controlled solar lamp intensity controller circuit which can be used for controlling the street lamp LED intensity without practically reaching for the LED box. The idea was requested by one of the dedicated members of this website

Circuit Objectives and Requirements

  1. I have successful build this current controlled driver circuit with a 50 watt LED (5 x 10 watt) for a garden light.
  2. So far i don't want to use it the whole night and because of its elevated position (it will be about 4-5 meter above the
    earth),manual Switching is not preferable.
  3. Therefore would you mind suggesting me any remote control circuit for Controlling LED Intensity? counting on your usual co-operation!

The proposed circuit can be built using the below shown circuit design.

Remote Controlled Solar Lamp Intensity Controller Circuit

The Design

The design employs 3-step intensity control for the connected LED lamp which could be easily converted to a 10-step intensity controller by simply repeating the indicated relay driver stages across all the 10 pinouts of the IC 4017.

The circuit basically is made up of 3 distinct stages, which can be understood from the following explanation:

The first stage from right is a transistor based LED current controller circuit which has been already built by the user as the solar lamp, who requested this article.

The central IC 4017 stage is a 3 step relay selector switch circuit which toggles sequentially across the relay stages switching the relays ON/OFF one at a time in response to every single pulse at its pin#14.

The 3rd stage at the left side is an RF remote control receiver module, whose VT pinout is configured with the pin#14 of the IC 4017.

The pin VT of the remote module IC HT12D blinks once, each time the remote transmitter handset button is pressed (any button out of the 4 buttons).

This blinking of the VT pin is used as the toggling pulse for the IC 4017 which responds instantly causing the subsequent relay to latch, and releasing the previous relay in the sequence.

The relay contacts can be seen configured with current determining resistor Rx, Ry, Rz, which are correspondingly selected from a higher value to a lower value and vice versa by the relay contacts.

These resistors get linked with the current controlled LED driver stage altering the current restriction levels of the LED driver stage.

This action in turn renders the LED with a corresponding amount of current limit producing an equivalent level of  illumination on the LED, lower current causes the illumination to decrease and thesubsequent higher current selection allows the LED intensity to grow brighter depending on which resistor is toggled ON by relays.

The resistors Rx, Ry, Rz can be calculated by the formula provided in this 100 watt LED driver circuit article

The transmitter circuit for the above explained remote controlled solar lamp intensity controller circuit can be witnessed in the following diagram and built accordingly for the lamp intensity control.

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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!

Have Questions? Please Comment below to Solve your Queries! Comments must be Related to the above Topic!!

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