ldr

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  1. B

    Controlling DC motor directing using LDR.

    Hello! I’m using two photoresistors to control a motor's direction based on which one receives more light. With two motors, I have it set up so the right motor spins when the right LDR gets more light, and the left motor spins when the left LDR gets more light. I've made that using two 2N2222...
  2. F

    Design for solar powered Dusk until Dawn streetlight

    Hi, I need some help verifying my thinking on solar panel charging of a 3.7v lithium ion battery. Long story short we are renovating our old village street light. This was originally an oil lamp and we are getting a replica made and as there is no power supply nearby are going to install a...
  3. E

    Hello fellas, i'm building a LDR circuit following my teacher's diagram, but i don't know what i did wrong, can you help me?

    Here's the circuit from my teacher And here's the circuit i built on ISIS I don't know if i'm using the wrong components or values, i need this for a school work here some more details: 10k Potentiometer Transistor BJT BC547 And i believe most of details are on the image already My...
  4. D3ADZ0NE

    How do I build a circuit to dim an AC powered lamp at low light levels

    I have a college group project to build a traffic light using only analog components (no microcontrollers ), my subsection is to design and build the driver unit and a circuit that dims a set of ac lamps by 60% at night. I receive digital signals from a 555 timing circuit. Now, I've managed to...
  5. V

    In-depth resources to create my own dual-axis solar tracker using 1 DC motor and 1 battery/power source

    Hi all, I'm quite new to electronics. I have a very basic understanding of DC circuits, but nothing too extreme, therefore I would like some help on how to create a dual-axis solar tracker using 2 LDRs, run off of a single DC motor, and 1 battery/power source (potentially looking into solar...
  6. B

    Automated watering system

    I was wondering if someone could help and guide me in a little project that I am working on. I am making an automated watering system for my wife. I can't seem to wrap my head around the 'C' script/code. This is what I want to happen. Using an LDR I wish to determine weather it is day or...
  7. J

    Designing a stable and self-regulated halogen light source

    Need Statement (Not a lot of experience with power electronics, apologies). I need to power a low-voltage halogen lamp (OSRAM 64328 HLX, 65W, Nominal voltage 9.8V, 6.6A) with a 230V AC source. Additionally, I need to have the capability to digitally control the powering of this lamp, which I...
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