Recent content by IanP1

  1. IanP1

    interface circuit with computer

    As Moderator said this will be last post on this subjet here. Please try this link http://www.kmitl.ac.th/~kswichit/ There you select type of microcontroler family you are interested in and you will find complete projects on how to build development cards with DI/Os ADCs...etc
  2. IanP1

    encoder output to rs232 conversion

    In my oppinion solution given by Kevin is not the right way to go.. I would employ any microcontroller (8051, PIC) with built-in UART, so you don't need to warry about bits, bytes and timing. All is done for you within this microcontroller. If it is for example 8051, use 11059200Hz cristal...
  3. IanP1

    interface circuit with computer

    There are 2 ways of doing this: 1. You can buy a PCI, ..., (depending on your computer hardware) A/D card with, say 16 analog inputs and 16 Digital I/Os. Cards usually come with drivers for LabView or any other data acquisition software and as software developer you will be able to get data...
  4. IanP1

    help pls!

    You can design a data logger that will logg wind speed and temperature every 10mintes for, say 1 month... This project involves analog and digital design and also some microcontroller programming...
  5. IanP1

    Varible Car powersupply

    You can use any of the adjustable switch mode step-up ICs such as LM2675adj. Info on this one you can find in: robotica.pardini.net/Documentos/LM2675.pdf
  6. IanP1

    Show something on TV?

    There are hundreds of IC available on the market to write text on live video signal or to generate background and superimpose text on this background. Most of these IC are used in TV sets to display channel number etc and in handycams (time & date, counter etc.) Go to Google and type for...
  7. IanP1

    voltage divider for AC

    Hi Ante, I have 96 low voltage lights in my house and they are fed from 240/12V transformers and for most of them I fitted light dimmers. These devices are using triacs (not scrs). Obviously, as they are phase control regulators, the shape of the "sine" wave is not sine any more but that...
  8. IanP1

    voltage divider for AC

    That I fully understand. Yet we still don't know what voltage is Darrins going to devide/adjust. Maybe he is after low voltage and in his case you can use transformer and SCR type dimmer and adjust voltage (this time isolated ) on the secondary from 0 to ...???? We just don't know..
  9. IanP1

    voltage divider for AC

    It is dangeres !!! but maybe you can use variable transformer? It is design to produce output from 0-100% of input
  10. IanP1

    ps/2 to rs-232(serial port)

    If you are familiar with 8051 family you can go to Philips Semiconductors and find application note AN434. There you will find complete description on how to connect a PC keyboard to I2C bus and instead of using I2C routines (wich are pretty complicated) you may use standard assembler commands...
  11. IanP1

    Water Leak Detector

    I don't know where you live but go to your local electronic/hobby shop and buy yourself a kit of Water Indicator or something similar. This kit will come with circuit diagram, PCB and all components and the only thing that you may have to add will be a relay to handle higher voltage.
  12. IanP1

    Fibre optic video transmission

    I would like to transmitt FM modulated video signal over 1000m of multimode fibre optic cable. This transmission has to be on 1300nm as I already have 3-full duplex data channels on 850nm. What will be the easiest way of modulating FM video signal with no quality losses?
  13. IanP1

    RS232 to I2C/SPI

    You can use CPU such as 87C654 or similar which have UART for RS-232 and I2C interface. In www.semiconductors.philipc.com you will find several application notes on I2C protocol (ready to go). Don't forget about RS-232 driver (MAX202 + 4x 100nF caps). ::)
  14. IanP1

    Fibre Optic Tx and Rx

    Urgently needed info or data sheet on Siemens V23800-S2-T5 fibre optic transmitter and V23804-E2-T5 receiver ::)
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