Recent content by Jaron Wiley

  1. J

    Calculating Resistors for a Photocell Dark Switch Circuit

    Hi I am trying to make an LED 3.5V 0.02A run in a circuit that will turn it off when visible light comes on. I have a cadmium sulfide photocell I took out of a night light. The power input is 12V 250mA. I understand I need to use a transistor as a switch for the LED and I know how to calculate...
  2. J

    Need help creating a solar charging circuit for hobby

    Would this be a better booster to use? http://www.newark.com/jsp/search/productdetail.jsp?SKU=65J6904&CMP=KNC-GPLA
  3. J

    Need help creating a solar charging circuit for hobby

    I looked at the schematics for the SEPIC converter and I believe our friend is a correct that it is a little over my head. I understand the basics, I just have trouble with the equations (not knowing the desired values of Vd, etc.) Since this is just one part of a larger project I'm trying to...
  4. J

    Need help creating a solar charging circuit for hobby

    Hi I am fairly new to electronics and I have a project I want to create a circuit for. I have a solar panel rated 6v 50mA. I want to make a rechargeable battery run a series of 2 or 3 bright LEDs. My question is: What voltage limit will the source need to have in order to take a charge...