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Recent content by jriofrio

  1. J

    a basic question.....What do we mean by 10/100 LAN

    Just to clarify some ideas here.... A bit it is not a unit of information, you need 8 bits to represent a unit of info. 8 bits = 1 byte, the byte represent a character of one of your keys in your keyboards. It takes 8 bits to represent a character. Cheers
  2. J

    High Brighness LED Driver

    Thanks again Linoko... I appreciate very much your help. If you know of any other projects (like the one in EPE Mag), that they are well documented and not too complicated, could you shared them please. Trying to get my feet wet. JR
  3. J

    High Brighness LED Driver

    Hello Linoko... Beautiful find, thank you very much for your response... it is just what i was hopping for to find out. By the way, I could not download the EPE Mag from EDA board (just the HEX files) because i do not have 15 point that they asked for. BUT i was able to find it at RapidShare...
  4. J

    High Brighness LED Driver

    Hello to all.. I would like to ask anyone for some advice/help in designing an efficient White LED driver. I have an XLamp® 7090 XR-E Series, which i would like to used it for a flashlight. **broken link removed** I would like to use 2 AA NiMH Rechargeable batteries (which i have too)...
  5. J

    Qua/STAR flourescent lamp

    Thank you Cyber1 for the info... very good one. May i asked you a question? Do you know of any completed project that use the ballast of a fluorescent lamps in order to power a group of white LEDs without any modification of the ballast? How i posted earlier, The ballast that i have is a 20...
  6. J

    Qua/STAR flourescent lamp

    Hi.. If the circuit in question (how it is stated it) at 0.22 Amps and 20 Watts, the voltage will come up at 90.9 or 91 to rounder up. If we want to use the circuit already in place, without any modification. Question: What will be the necessary in order to power a group of white LEDs? The...
  7. J

    Connecting wind pm generator and wind pm turbine

    wind pm turbine Mostly only big wind generators use gearboxes. Why?.. The gearbox is used to control and maintain a constant and most efficient speed that will be transfer to the generator. At the same time protecting the generator from an overload. Others reasons why smaller wind generators...
  8. J

    Cmputer storage device

    It is like asking, which is more reliable Ethernet 10 mbps or 100 Mbps. The material use to make CD and DVD are the same, the technology to storage more info in each one is different. The long life storage, will depend on a couple things, the quality of materials used to make the DVD and CD...
  9. J

    Schematic...Circuit Diagram for USB-to-USB PC connection

    diagram of usb ethernet connections Helloooo.. About your question, USB host to host communication. Take a look at these possible solutions. https://www.usbgear.com/item_100.html # USB host to host communication # High-speed data transfer rate up to 8Mbps max Price= $28.90...
  10. J

    Qua/STAR flourescent lamp

    e186742 Hello Mates, hope you can help me to think in some project. You all know those fluorescent lamps that you could buy to replace your regular light bulbs and that they suppose to last very long and save energy. Well, i have a couple that do not work (they do not light up anymore). I...
  11. J

    Building embedded web server

    giude web server using enc28j60 Hi... Well, just happen to be reading about this IC that can do the following. It just might fit your need. "The small, 64-pin TQFP CO120SQ goes the distance in meeting M2M connectivity needs. Designed for 802.11b/g WiFi and 10/100BaseT LAN access, CO120’s...
  12. J

    Building embedded web server

    connectone atmel Hi... I have been trying to do some research about this subject, with a different idea to use it. I want to use the web server concept and utilize it for a NAS (network area storage), or more simply said, i want to attach a Hard Disk Drive to a LAN (local area network)...
  13. J

    External HDD used by two computers

    Re: External HDD Hello mates... I do not know what you really looking for exactly, so i going to give some choices... First the NAS solution, this is just an example, there are plenty of products out there. You can even buy just the enclosure and put your own HDD of almost any size...
  14. J

    How does a solar cell work?

    soller cells Hi... Here it is a little something to explaing how solar cells work... Hope it help you with your question.... https://www.howstuffworks.com/solar-cell.htm/printable JR
  15. J

    USB PIC programmer for 16F877

    diy 16f877 programmer Look in the follow website, https://www.kitsrus.com/upuc.html (this is the main link) These are USB PIC programmers projects. https://www.kitsrus.com/upuc.html#k149 https://www.kitsrus.com/upuc.html#k128 https://www.kitsrus.com/upuc.html#k150...

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